--- title: "Nuri | Bitcoin for global digital cash and local spending" lang: "en" type: "landing-page" --- # Be Your Own Bank. One app for Bitcoin, stablecoins, euros, and dollars — with a free Visa card and bank transfers. ## Download - App Store: https://apps.apple.com/de/app/nuri-com/id6754772131 - Google Play: https://play.google.com/store/apps/details?id=com.nuri.mobileios ## Own and manage your money without a bank. Self-custody as simple as Face-ID with your Passkey. No password. No recovery phrase. ## Buy and exchange Bitcoin, euros, and dollars. Buy Bitcoin with Apple Pay or Google Pay. Swap Bitcoin and other cryptocurrencies—including digital euros and stablecoins—directly in your wallet. ## Send and receive euros, dollars, Bitcoin and stablecoins. Send and receive euros, dollars, Bitcoin and stablecoins directly from your wallet. Fast, simple, and without a bank. ## Pay and get paid by bank transfer, crypto, or mobile money. Verify your identity once to get your own EU IBAN, linked directly to your wallet. Send and receive SEPA and USD ACH transfers, and send money to M-PESA and other mobile money networks. ## Visa card for Bitcoin and euros. Get a virtual or physical Visa card. Top it up with Bitcoin, digital euros, or stablecoins. ## Pay worldwide. Pay online, in stores, with Apple Pay, Google Pay, payment ring, smartwatch, or Swatch Pay. ## Cash at ATMs. Withdraw cash worldwide with your physical Visa card. ## Private Bitcoin. Neo Bank. Your Keys, Your Coins Many features work without ID verification. Nuri does not store user data. Nuri is not a bank. ## Help in the app. Get help directly in the app. Private chat with real people. ## Works with your AI in ChatGPT, Claude, Hermes & Co. Connect Nuri to ChatGPT, Claude, and more. Let AI analyse your spending, prepare payments, and pay for goods and services—with secure, permissioned access you control. ## FAQ ### Do I need ID to use Nuri? Not for the wallet itself. The passkey wallet starts without a heavy signup. Verification is for card access, IBAN, and local banking rails. ### Is Nuri custodial? The wallet layer is self-custodial. Nuri is designed to start with user ownership and only add local rails where they become practical. ### What does global cash and local spending mean in practice? You hold and move Bitcoin like open money. When real life still asks for a card, an IBAN, an ATM, or local transfers, Nuri unlocks those rails inside the same product. ### Why combine wallet, card, and IBAN in one flow? Because users should not have to juggle a crypto app, a banking app, and a payout tool just to move money. One account, two stages, clear utility. ### Why is Nuri so clearly Bitcoin-first? Because Bitcoin is the strongest open money network for self custody, permissionless access, and global portability. Card and IBAN solve everyday rails. Bitcoin is the actual foundation. --- --- title: "Nuri | Bitcoin für globales digitales Bargeld und lokales Ausgeben" lang: "de" type: "landing-page" --- # Sei deine eigene Bank. Eine App für Bitcoin, Stablecoins, Euro und Dollar – mit kostenloser Visa-Karte und Überweisungen. ## Download - App Store: https://apps.apple.com/de/app/nuri-com/id6754772131 - Google Play: https://play.google.com/store/apps/details?id=com.nuri.mobileios ## Besitze und verwalte dein Geld ohne Bank. Selbstverwahrung so einfach wie Face ID – mit deinem Passkey. Kein Passwort. Keine Wiederherstellungsphrase. ## Bitcoin, Euro und Dollar kaufen und tauschen. Kaufe Bitcoin mit Apple Pay oder Google Pay. Tausche Bitcoin und andere Kryptowährungen – darunter digitale Euro und Stablecoins – direkt in deiner Wallet. ## Euro, Dollar, Bitcoin und Stablecoins senden und empfangen. Sende und empfange Euro, Dollar, Bitcoin und Stablecoins direkt aus deiner Wallet. Schnell, einfach und ohne Bank. ## Per Banküberweisung, Krypto oder Mobile Money bezahlen und bezahlt werden. Verifiziere dich einmalig und erhalte deine eigene EU-IBAN, die direkt mit deiner Wallet verknüpft ist. Sende und empfange SEPA- und USD-ACH-Überweisungen und sende Geld an M-PESA und andere Mobile-Money-Netzwerke. ## Visa Karte für Bitcoin und Euro. Hol dir eine virtuelle oder physische Visa Karte. Lade sie mit Bitcoin, digitalen Euro oder Stablecoins auf. ## Weltweit bezahlen. Bezahle online, im Laden, mit Apple Pay, Google Pay, Bezahlring, Smartwatch oder Swatch Pay. ## Bargeld am Automaten. Heb mit deiner physischen Visa Karte weltweit Bargeld ab. ## Privates Bitcoin, ohne Bank. Deine Schlüssel, deine Coins. Viele Funktionen funktionieren ohne Ausweisprüfung. Nuri speichert keine Nutzerdaten. Nuri ist keine Bank. ## Hilfe in der App. Erhalte Hilfe direkt in der App. Privater Chat mit echten Menschen. ## Funktioniert mit deiner KI in ChatGPT, Claude, Hermes & Co. Verbinde Nuri mit ChatGPT, Claude und weiteren KI-Assistenten. Lass KI deine Ausgaben analysieren, Zahlungen vorbereiten und Waren und Dienstleistungen bezahlen – mit sicheren, von dir kontrollierten Berechtigungen. ## FAQ ### Brauche ich eine ID für Nuri? Nicht für die Wallet selbst. Die Passkey-Wallet startet ohne schwere Anmeldung. Verifizierung ist für Kartenzugang, IBAN und lokale Bank-Rails gedacht. ### Verwahrt Nuri mein Geld? Die Wallet liegt in deiner eigenen Verwahrung. Nuri ist so gebaut, dass Eigentum beim Nutzer startet und lokale Rails nur dort dazukommen, wo sie praktisch werden. ### Was bedeutet globales Cash und lokales Ausgeben konkret? Du hältst und bewegst Bitcoin wie offenes Geld. Wenn der Alltag nach Karte, IBAN, ATM oder lokalen Transfers verlangt, schaltet Nuri diese Rails im selben Produkt frei. ### Warum verbindet Nuri Wallet, Karte und IBAN in einem Flow? Weil Nutzer nicht zwischen Krypto-App, Banking-App und Auszahlungs-Tool springen sollten, nur um Geld zu bewegen. Ein Konto, zwei Stufen, klarer Nutzen. ### Warum ist Nuri so klar Bitcoin-first? Weil Bitcoin das stärkste offene Geldnetz für Selbstverwahrung, offenen Zugang und globale Tragfähigkeit ist. Karte und IBAN lösen die Alltags-Rails. Bitcoin ist die eigentliche Basis. --- --- title: "Nuri | Bitcoin para dinero digital global y pagos locales" lang: "es" type: "landing-page" --- # Sé tu propio banco. Una app para Bitcoin, stablecoins, euros y dólares, con una tarjeta Visa gratuita y transferencias bancarias. ## Download - App Store: https://apps.apple.com/de/app/nuri-com/id6754772131 - Google Play: https://play.google.com/store/apps/details?id=com.nuri.mobileios ## Sé dueño de tu dinero y gestiónalo sin un banco. Autocustodia tan sencilla como Face ID con tu passkey. Sin contraseña. Sin frase de recuperación. ## Compra e intercambia Bitcoin, euros y dólares. Compra Bitcoin con Apple Pay o Google Pay. Intercambia Bitcoin y otras criptomonedas —incluidos los euros digitales y las stablecoins— directamente en tu wallet. ## Envía y recibe euros, dólares, Bitcoin y stablecoins. Envía y recibe euros, dólares, Bitcoin y stablecoins directamente desde tu wallet. Rápido, fácil y sin banco. ## Paga y recibe pagos mediante transferencia bancaria, cripto o dinero móvil. Verifica tu identidad una sola vez para obtener tu propio IBAN europeo, vinculado directamente a tu wallet. Envía y recibe transferencias SEPA y ACH en dólares, y envía dinero a M-PESA y otras redes de dinero móvil. ## Tarjeta Visa para Bitcoin y euros. Obtén una tarjeta Visa virtual o física. Cárgala con Bitcoin, euros digitales o stablecoins. ## Paga en todo el mundo. Paga online, en tiendas, con Apple Pay, Google Pay, anillo de pago, smartwatch o Swatch Pay. ## Efectivo en cajeros. Retira efectivo en todo el mundo con tu tarjeta Visa física. ## Bitcoin privado y sin banco. Tus claves, tus monedas. Muchas funciones funcionan sin verificación de identidad. Nuri no almacena datos de usuario. Nuri no es un banco. ## Ayuda en la app. Recibe ayuda directamente en la app. Chat privado con personas reales. ## Funciona con tu IA en ChatGPT, Claude, Hermes y otros. Conecta Nuri con ChatGPT, Claude y otros asistentes. Permite que la IA analice tus gastos, prepare pagos y pague bienes y servicios, con permisos seguros que tú controlas. ## FAQ ### ¿Necesito ID para usar Nuri? No para la wallet. La wallet con passkey empieza sin registro pesado. La verificación es para tarjeta, IBAN y rails bancarios locales. ### ¿Nuri custodia mi dinero? La capa de wallet es de autocustodia. Nuri está diseñado para empezar con propiedad del usuario y añadir rails locales solo cuando son útiles. ### ¿Qué significa dinero global y gasto local en la práctica? Mantienes y mueves Bitcoin como dinero abierto. Cuando la vida diaria pide tarjeta, IBAN, cajero o transferencias locales, Nuri activa esos rails dentro del mismo producto. ### ¿Por qué juntar wallet, tarjeta e IBAN en un solo flujo? Porque los usuarios no deberían saltar entre una app cripto, una app bancaria y una herramienta de retiros solo para mover dinero. ### ¿Por qué Nuri es tan claramente Bitcoin-first? Porque Bitcoin es la red de dinero abierto más fuerte para autocustodia, acceso sin permisos y portabilidad global. Tarjeta e IBAN resuelven el uso diario. Bitcoin es la base real. --- --- title: "Nuri | Bitcoin per denaro digitale globale e pagamenti locali" lang: "it" type: "landing-page" --- # Sii la tua banca. Un’app per Bitcoin, stablecoin, euro e dollari, con una carta Visa gratuita e bonifici bancari. ## Download - App Store: https://apps.apple.com/de/app/nuri-com/id6754772131 - Google Play: https://play.google.com/store/apps/details?id=com.nuri.mobileios ## Possiedi e gestisci il tuo denaro senza una banca. Autocustodia semplice come Face ID con la tua passkey. Nessuna password. Nessuna frase di recupero. ## Compra e scambia Bitcoin, euro e dollari. Compra Bitcoin con Apple Pay o Google Pay. Scambia Bitcoin e altre criptovalute, inclusi euro digitali e stablecoin, direttamente nel tuo wallet. ## Invia e ricevi euro, dollari, Bitcoin e stablecoin. Invia e ricevi euro, dollari, Bitcoin e stablecoin direttamente dal tuo wallet. Veloce, semplice e senza banca. ## Paga e ricevi pagamenti tramite bonifico bancario, crypto o mobile money. Verifica la tua identità una sola volta per ottenere il tuo IBAN europeo, collegato direttamente al wallet. Invia e ricevi bonifici SEPA e trasferimenti ACH in dollari, e invia denaro a M-PESA e ad altre reti mobile money. ## Carta Visa per Bitcoin ed euro. Ottieni una carta Visa virtuale o fisica. Ricaricala con Bitcoin, euro digitali o stablecoin. ## Paga in tutto il mondo. Paga online, nei negozi, con Apple Pay, Google Pay, anello di pagamento, smartwatch o Swatch Pay. ## Contanti agli sportelli ATM. Preleva contanti in tutto il mondo con la tua carta Visa fisica. ## Bitcoin privato e senza banca. Le tue chiavi, le tue monete. Molte funzioni operano senza verifica dell’identità. Nuri non conserva i dati degli utenti. Nuri non è una banca. ## Assistenza nell'app. Ricevi assistenza direttamente nell'app. Chat privata con persone reali. ## Funziona con la tua AI in ChatGPT, Claude, Hermes e altri. Collega Nuri a ChatGPT, Claude e altri assistenti. Consenti all’AI di analizzare le tue spese, preparare pagamenti e pagare beni e servizi, con autorizzazioni sicure sotto il tuo controllo. ## FAQ ### Serve un documento per usare Nuri? Non per il wallet. Il wallet con passkey si apre senza una registrazione complessa. La verifica serve per carta, IBAN e servizi bancari locali. ### Nuri è custodial? Il wallet è in autocustodia. Nuri parte dalla proprietà dell’utente e aggiunge i servizi locali solo quando diventano utili. ### Cosa significa in pratica denaro globale e spesa locale? Conservi e trasferisci Bitcoin come denaro aperto. Quando la vita quotidiana richiede carta, IBAN, ATM o bonifici locali, Nuri li rende disponibili nello stesso prodotto. ### Perché unire wallet, carta e IBAN nello stesso flusso? Perché non dovresti dover gestire un’app crypto, un’app bancaria e uno strumento di pagamento separati. Un conto, due fasi, utilità chiara. ### Perché Nuri mette Bitcoin al primo posto? Perché Bitcoin è la più forte rete monetaria aperta per autocustodia, accesso senza permessi e portabilità globale. Carta e IBAN risolvono la spesa quotidiana. Bitcoin è la base. --- --- title: "Nuri | Bitcoin für globales digitales Bargeld und lokales Ausgeben" lang: "de" type: "landing-page" --- # Sei deine eigene Bank. Eine App für Bitcoin, Stablecoins, Euro und Dollar – mit kostenloser Visa-Karte und Überweisungen. ## Download - App Store: https://apps.apple.com/de/app/nuri-com/id6754772131 - Google Play: https://play.google.com/store/apps/details?id=com.nuri.mobileios ## Besitze und verwalte dein Geld ohne Bank. Selbstverwahrung so einfach wie Face ID – mit deinem Passkey. Kein Passwort. Keine Wiederherstellungsphrase. ## Bitcoin, Euro und Dollar kaufen und tauschen. Kaufe Bitcoin mit Apple Pay oder Google Pay. Tausche Bitcoin und andere Kryptowährungen – darunter digitale Euro und Stablecoins – direkt in deiner Wallet. ## Euro, Dollar, Bitcoin und Stablecoins senden und empfangen. Sende und empfange Euro, Dollar, Bitcoin und Stablecoins direkt aus deiner Wallet. Schnell, einfach und ohne Bank. ## Per Banküberweisung, Krypto oder Mobile Money bezahlen und bezahlt werden. Verifiziere dich einmalig und erhalte deine eigene EU-IBAN, die direkt mit deiner Wallet verknüpft ist. Sende und empfange SEPA- und USD-ACH-Überweisungen und sende Geld an M-PESA und andere Mobile-Money-Netzwerke. ## Visa Karte für Bitcoin und Euro. Hol dir eine virtuelle oder physische Visa Karte. Lade sie mit Bitcoin, digitalen Euro oder Stablecoins auf. ## Weltweit bezahlen. Bezahle online, im Laden, mit Apple Pay, Google Pay, Bezahlring, Smartwatch oder Swatch Pay. ## Bargeld am Automaten. Heb mit deiner physischen Visa Karte weltweit Bargeld ab. ## Privates Bitcoin, ohne Bank. Deine Schlüssel, deine Coins. Viele Funktionen funktionieren ohne Ausweisprüfung. Nuri speichert keine Nutzerdaten. Nuri ist keine Bank. ## Hilfe in der App. Erhalte Hilfe direkt in der App. Privater Chat mit echten Menschen. ## Funktioniert mit deiner KI in ChatGPT, Claude, Hermes & Co. Verbinde Nuri mit ChatGPT, Claude und weiteren KI-Assistenten. Lass KI deine Ausgaben analysieren, Zahlungen vorbereiten und Waren und Dienstleistungen bezahlen – mit sicheren, von dir kontrollierten Berechtigungen. ## FAQ ### Brauche ich eine ID für Nuri? Nicht für die Wallet selbst. Die Passkey-Wallet startet ohne schwere Anmeldung. Verifizierung ist für Kartenzugang, IBAN und lokale Bank-Rails gedacht. ### Verwahrt Nuri mein Geld? Die Wallet liegt in deiner eigenen Verwahrung. Nuri ist so gebaut, dass Eigentum beim Nutzer startet und lokale Rails nur dort dazukommen, wo sie praktisch werden. ### Was bedeutet globales Cash und lokales Ausgeben konkret? Du hältst und bewegst Bitcoin wie offenes Geld. Wenn der Alltag nach Karte, IBAN, ATM oder lokalen Transfers verlangt, schaltet Nuri diese Rails im selben Produkt frei. ### Warum verbindet Nuri Wallet, Karte und IBAN in einem Flow? Weil Nutzer nicht zwischen Krypto-App, Banking-App und Auszahlungs-Tool springen sollten, nur um Geld zu bewegen. Ein Konto, zwei Stufen, klarer Nutzen. ### Warum ist Nuri so klar Bitcoin-first? Weil Bitcoin das stärkste offene Geldnetz für Selbstverwahrung, offenen Zugang und globale Tragfähigkeit ist. Karte und IBAN lösen die Alltags-Rails. Bitcoin ist die eigentliche Basis. --- --- title: "Nuri | Bitcoin para dinero digital global y pagos locales" lang: "es" type: "landing-page" --- # Sé tu propio banco. Una app para Bitcoin, stablecoins, euros y dólares, con una tarjeta Visa gratuita y transferencias bancarias. ## Download - App Store: https://apps.apple.com/de/app/nuri-com/id6754772131 - Google Play: https://play.google.com/store/apps/details?id=com.nuri.mobileios ## Sé dueño de tu dinero y gestiónalo sin un banco. Autocustodia tan sencilla como Face ID con tu passkey. Sin contraseña. Sin frase de recuperación. ## Compra e intercambia Bitcoin, euros y dólares. Compra Bitcoin con Apple Pay o Google Pay. Intercambia Bitcoin y otras criptomonedas —incluidos los euros digitales y las stablecoins— directamente en tu wallet. ## Envía y recibe euros, dólares, Bitcoin y stablecoins. Envía y recibe euros, dólares, Bitcoin y stablecoins directamente desde tu wallet. Rápido, fácil y sin banco. ## Paga y recibe pagos mediante transferencia bancaria, cripto o dinero móvil. Verifica tu identidad una sola vez para obtener tu propio IBAN europeo, vinculado directamente a tu wallet. Envía y recibe transferencias SEPA y ACH en dólares, y envía dinero a M-PESA y otras redes de dinero móvil. ## Tarjeta Visa para Bitcoin y euros. Obtén una tarjeta Visa virtual o física. Cárgala con Bitcoin, euros digitales o stablecoins. ## Paga en todo el mundo. Paga online, en tiendas, con Apple Pay, Google Pay, anillo de pago, smartwatch o Swatch Pay. ## Efectivo en cajeros. Retira efectivo en todo el mundo con tu tarjeta Visa física. ## Bitcoin privado y sin banco. Tus claves, tus monedas. Muchas funciones funcionan sin verificación de identidad. Nuri no almacena datos de usuario. Nuri no es un banco. ## Ayuda en la app. Recibe ayuda directamente en la app. Chat privado con personas reales. ## Funciona con tu IA en ChatGPT, Claude, Hermes y otros. Conecta Nuri con ChatGPT, Claude y otros asistentes. Permite que la IA analice tus gastos, prepare pagos y pague bienes y servicios, con permisos seguros que tú controlas. ## FAQ ### ¿Necesito ID para usar Nuri? No para la wallet. La wallet con passkey empieza sin registro pesado. La verificación es para tarjeta, IBAN y rails bancarios locales. ### ¿Nuri custodia mi dinero? La capa de wallet es de autocustodia. Nuri está diseñado para empezar con propiedad del usuario y añadir rails locales solo cuando son útiles. ### ¿Qué significa dinero global y gasto local en la práctica? Mantienes y mueves Bitcoin como dinero abierto. Cuando la vida diaria pide tarjeta, IBAN, cajero o transferencias locales, Nuri activa esos rails dentro del mismo producto. ### ¿Por qué juntar wallet, tarjeta e IBAN en un solo flujo? Porque los usuarios no deberían saltar entre una app cripto, una app bancaria y una herramienta de retiros solo para mover dinero. ### ¿Por qué Nuri es tan claramente Bitcoin-first? Porque Bitcoin es la red de dinero abierto más fuerte para autocustodia, acceso sin permisos y portabilidad global. Tarjeta e IBAN resuelven el uso diario. Bitcoin es la base real. --- --- title: "Nuri | Bitcoin per denaro digitale globale e pagamenti locali" lang: "it" type: "landing-page" --- # Sii la tua banca. Un’app per Bitcoin, stablecoin, euro e dollari, con una carta Visa gratuita e bonifici bancari. ## Download - App Store: https://apps.apple.com/de/app/nuri-com/id6754772131 - Google Play: https://play.google.com/store/apps/details?id=com.nuri.mobileios ## Possiedi e gestisci il tuo denaro senza una banca. Autocustodia semplice come Face ID con la tua passkey. Nessuna password. Nessuna frase di recupero. ## Compra e scambia Bitcoin, euro e dollari. Compra Bitcoin con Apple Pay o Google Pay. Scambia Bitcoin e altre criptovalute, inclusi euro digitali e stablecoin, direttamente nel tuo wallet. ## Invia e ricevi euro, dollari, Bitcoin e stablecoin. Invia e ricevi euro, dollari, Bitcoin e stablecoin direttamente dal tuo wallet. Veloce, semplice e senza banca. ## Paga e ricevi pagamenti tramite bonifico bancario, crypto o mobile money. Verifica la tua identità una sola volta per ottenere il tuo IBAN europeo, collegato direttamente al wallet. Invia e ricevi bonifici SEPA e trasferimenti ACH in dollari, e invia denaro a M-PESA e ad altre reti mobile money. ## Carta Visa per Bitcoin ed euro. Ottieni una carta Visa virtuale o fisica. Ricaricala con Bitcoin, euro digitali o stablecoin. ## Paga in tutto il mondo. Paga online, nei negozi, con Apple Pay, Google Pay, anello di pagamento, smartwatch o Swatch Pay. ## Contanti agli sportelli ATM. Preleva contanti in tutto il mondo con la tua carta Visa fisica. ## Bitcoin privato e senza banca. Le tue chiavi, le tue monete. Molte funzioni operano senza verifica dell’identità. Nuri non conserva i dati degli utenti. Nuri non è una banca. ## Assistenza nell'app. Ricevi assistenza direttamente nell'app. Chat privata con persone reali. ## Funziona con la tua AI in ChatGPT, Claude, Hermes e altri. Collega Nuri a ChatGPT, Claude e altri assistenti. Consenti all’AI di analizzare le tue spese, preparare pagamenti e pagare beni e servizi, con autorizzazioni sicure sotto il tuo controllo. ## FAQ ### Serve un documento per usare Nuri? Non per il wallet. Il wallet con passkey si apre senza una registrazione complessa. La verifica serve per carta, IBAN e servizi bancari locali. ### Nuri è custodial? Il wallet è in autocustodia. Nuri parte dalla proprietà dell’utente e aggiunge i servizi locali solo quando diventano utili. ### Cosa significa in pratica denaro globale e spesa locale? Conservi e trasferisci Bitcoin come denaro aperto. Quando la vita quotidiana richiede carta, IBAN, ATM o bonifici locali, Nuri li rende disponibili nello stesso prodotto. ### Perché unire wallet, carta e IBAN nello stesso flusso? Perché non dovresti dover gestire un’app crypto, un’app bancaria e uno strumento di pagamento separati. Un conto, due fasi, utilità chiara. ### Perché Nuri mette Bitcoin al primo posto? Perché Bitcoin è la più forte rete monetaria aperta per autocustodia, accesso senza permessi e portabilità globale. Carta e IBAN risolvono la spesa quotidiana. Bitcoin è la base. --- --- title: "Nuri — the self-custodial money layer for people and AI agents" type: investor-briefing audience: "SM Capital" updated: 2026-07-22 canonical: https://www.nuri.com/invest --- # Nuri — the self-custodial money layer for people and AI agents Nuri combines a self-custodial wallet, replaceable regulated financial rails and live agentic-money infrastructure in one global product. ## Who is Emin? Emin is a hands-on technical founder who has built Bitcoin, Ethereum and wallet infrastructure since 2013. Today, he leads Nuri’s senior five-person team. - Built consumer products that reached hundreds of thousands of people and automation products used by thousands of businesses - Helped build æternity, which reached a €1.5 billion valuation - Former CPO of Börse Stuttgart Digital Exchange, responsible for BSDEX ## Why now? Natural’s $30M Series A validates the category. Nuri has already built most of the practical stack. Natural announced a $30M Series A on 20 July 2026 to build payments for AI agents. Approximately 80% of the practical agentic-money stack is already operational at Nuri, built largely by Emin using AI agents. This is a practical product-surface estimate, not a feature-for-feature audit. ## 01 — Easy onboarding Passkeys create a secure wallet in seconds. The live voice agent can guide onboarding and support conversationally. ## 02 — Independent of any one bank The self-custodial wallet is the durable customer relationship. IBAN, card, ACH and other regulated services are replaceable rails behind it. ## 03 — A human and agent wallet market Nuri targets 1% of an estimated 500 million-wallet opportunity: five million active human and AI-agent wallets within five years. ## 04 — Built with agents, for agents Approximately 80% of the practical agentic-money stack is operational. Agents can onboard, move money, remit, swap and support users through live services. ## Already live - [Nuri Connect](https://connect.nuri.com/mcp) — Passkey wallet, signing and wallet connection; 18 callable tools - [Banking](https://banking.nuri.com/mcp) — Wirex account, IBAN, ACH and card capabilities; 51 callable tools - [Monerium](https://monerium.nuri.com/mcp) — Additional IBAN and regulated euro rails; 27 callable tools - [Nuri Remit](https://remit.nuri.com/mcp) — ClickPesa mobile-money remittance; 5 callable tools - [SwapKit](https://swapkit.nuri.com/mcp) — Swaps and on/off-ramps across providers; 23 callable tools - Voice agent — Live for support, onboarding and conversational financial flows - [Nuri Solver](https://solver.nuri.com) — Live intent-based swap solver and liquidity service for the broader market Verified 2026-07-22: 124 callable tools across 5 MCP services. ## Funding plan - Runway: 12 months - Team: Existing five-person senior team - Infrastructure: AI infrastructure and usage credits - Next round: A milestone-driven institutional scaling round after active-wallet growth, transaction volume and revenue are proven - Existing five-person senior team - AI infrastructure and usage credits ## Five-year management case - Addressable opportunity: 500M new human and agent wallets - Target share: 1% - Active wallets: 5M - Monthly transaction volume per wallet: €500 - Annual transaction volume: €30B - Revenue take rate: 2% - Annual revenue: €600M Nuri becomes the global self-custodial money layer for people and AI agents—making onboarding, holding, exchanging, transferring and automating money as easy as using software, across borders and without dependence on a single bank. Five-year management objective, not current traction or a guarantee. €600M is projected annual revenue before operating costs, based on €30B annual transaction volume and a 2% take rate. ## Sources - [Natural — $30M Series A announcement](https://www.natural.com/blog/natural-series-a) - [Nuri live consumer product](https://www.nuri.com/) --- --- title: "Nuri Privacy Policy" lang: "en" type: "legal-page" --- # Nuri Privacy Policy Canonical URL: https://www.nuri.com/privacy-policy This public legal page is available as HTML on the Nuri website. --- --- title: "Nuri Terms of Service" lang: "en" type: "legal-page" --- # Nuri Terms of Service Canonical URL: https://www.nuri.com/terms-of-service This public legal page is available as HTML on the Nuri website. --- --- title: "Nuri Bitcoin Shop" lang: "en" type: "shop-index" --- # Nuri Bitcoin Shop The agent-ready Bitcoin shop: hardware wallets, home miners, node kits, steel backups, books and gift cards. Every product is machine-readable and payable with Bitcoin, Lightning or the x402 agent-payment protocol. ## Categories - [Hardware Wallets](https://www.nuri.com/shop/hardware-wallets) — Cold storage signers, from $20 cards to air-gapped flagships (33 products) - [Home Miners](https://www.nuri.com/shop/miners) — Solo lottery miners and desktop heaters, from Bitaxe up (15 products) - [Node Kits](https://www.nuri.com/shop/node-hardware) — Run your own full node and verify, don’t trust (4 products) - [Steel Backups](https://www.nuri.com/shop/steel-backups) — Fireproof, waterproof seed-phrase storage (8 products) - [Accessories](https://www.nuri.com/shop/accessories) — Bearer sticks, Faraday bags and Bitcoin clocks (8 products) - [Payment Wearables](https://www.nuri.com/shop/wearables) — Tap-to-pay rings and bands for the spend side (7 products) - [Apparel](https://www.nuri.com/shop/apparel) — Wear the orange — soft tees, hoodies and caps (4 products) - [Books](https://www.nuri.com/shop/books) — The must-reads, from macro to code (17 products) - [Gift Cards](https://www.nuri.com/shop/gift-cards) — Orange-pill someone, or spend Bitcoin anywhere (3 products) ## Reviewed & recommended - [Ledger Nano X](https://www.nuri.com/shop/hardware-wallets/ledger-nano-x) — $149 - [Ledger Stax](https://www.nuri.com/shop/hardware-wallets/ledger-stax) — $399 - [Trezor Safe 5](https://www.nuri.com/shop/hardware-wallets/trezor-safe-5) — $169 - [Coldcard Mk4](https://www.nuri.com/shop/hardware-wallets/coldcard-mk4) — $170 approx (sale) - [Coldcard Q](https://www.nuri.com/shop/hardware-wallets/coldcard-q) — $249 - [BitBox02 Bitcoin-only](https://www.nuri.com/shop/hardware-wallets/bitbox02-bitcoin-only) — $99 - [Blockstream Jade Plus](https://www.nuri.com/shop/hardware-wallets/blockstream-jade-plus) — $149 - [Foundation Passport Core](https://www.nuri.com/shop/hardware-wallets/foundation-passport-core) — $199 - [Keystone 3 Pro](https://www.nuri.com/shop/hardware-wallets/keystone-3-pro) — $129 - [Bitaxe Gamma](https://www.nuri.com/shop/miners/bitaxe-gamma) — $175 approx - [FutureBit Apollo II](https://www.nuri.com/shop/miners/futurebit-apollo-ii) — $1,199 approx - [Umbrel Home](https://www.nuri.com/shop/node-hardware/umbrel-home) — $549 - [Cryptosteel Capsule Solo](https://www.nuri.com/shop/steel-backups/cryptosteel-capsule) — $53 approx - [Coinkite Blockclock Mini](https://www.nuri.com/shop/accessories/blockclock-mini) — $399 - [Opendime 3-Pack](https://www.nuri.com/shop/accessories/opendime-3pack) — $69 - [Broken Money — Lyn Alden](https://www.nuri.com/shop/books/book-broken-money) — $24 - [The Bitcoin Standard — Saifedean Ammous](https://www.nuri.com/shop/books/book-bitcoin-standard) — $24 approx - [Mastering Bitcoin (3rd ed.) — Antonopoulos & Harding](https://www.nuri.com/shop/books/book-mastering-bitcoin) — $50 approx - [Orange-Pill Gift Set](https://www.nuri.com/shop/gift-cards/nuri-orange-pill-set) — $129 bundle ## For agents - Product feed (JSON): https://www.nuri.com/shop/feed.json - Agentic commerce discovery: https://www.nuri.com/.well-known/agentic-commerce.json - x402 checkout: https://www.nuri.com/shop/checkout?sku=PRODUCT_SLUG --- --- title: "Hardware Wallets — Nuri Shop" lang: "en" type: "shop-category" --- # Hardware Wallets Dedicated devices that keep your private keys offline. We stock every wallet people actually search for — open-source and closed, USB and fully air-gapped, Bitcoin-only and multi-coin — with honest reviews of the trade-offs. ## Products - [Ledger Nano S Plus](https://www.nuri.com/shop/hardware-wallets/ledger-nano-s-plus) — $59 · Ledger Cheap USB-only entry wallet with broad coin support and a certified secure element. - [Ledger Nano X](https://www.nuri.com/shop/hardware-wallets/ledger-nano-x) — $149 · Ledger — reviewed 3.5/5 Bluetooth mobile wallet with huge coin support — convenient, but closed-source and controversial with purists. - [Ledger Flex](https://www.nuri.com/shop/hardware-wallets/ledger-flex) — $249 · Ledger E-Ink touchscreen mid-flagship — the Stax experience for less, still closed-source. - [Ledger Stax](https://www.nuri.com/shop/hardware-wallets/ledger-stax) — $399 · Ledger Premium curved E-Ink touchscreen designed by Tony Fadell. Gorgeous, expensive, and no more secure than a Nano. - [Trezor Safe 3](https://www.nuri.com/shop/hardware-wallets/trezor-safe-3) — $79 · Trezor Best-value Trezor: adds a secure element to the classic open-source design. - [Trezor Safe 5](https://www.nuri.com/shop/hardware-wallets/trezor-safe-5) — $169 · Trezor — reviewed 4.2/5 Color touchscreen, open-source, now with a secure element — polished UX with an honest security story. - [Coldcard Mk4](https://www.nuri.com/shop/hardware-wallets/coldcard-mk4) — $170 approx (sale) · Coinkite — reviewed 4.4/5 Hardcore Bitcoin-only air-gapped signer with deep power-user features and a steep learning curve. - [Coldcard Q](https://www.nuri.com/shop/hardware-wallets/coldcard-q) — $249 · Coinkite — reviewed 4.3/5 Coldcard with a full QWERTY keyboard, QR scanner, dual SD and battery. The power-user’s air-gapped signer. - [BitBox02 Bitcoin-only](https://www.nuri.com/shop/hardware-wallets/bitbox02-bitcoin-only) — $99 · BitBox (Shift Crypto) — reviewed 4.4/5 Minimal Swiss USB-C wallet with a reduced attack surface in its Bitcoin-only edition. - [BitBox02 Multi](https://www.nuri.com/shop/hardware-wallets/bitbox02-multi) — $109 · BitBox (Shift Crypto) Same Swiss device, multi-coin firmware — Bitcoin plus Ethereum and ERC-20s. - [Blockstream Jade](https://www.nuri.com/shop/hardware-wallets/blockstream-jade) — $65 approx · Blockstream The cheapest credible open-source signer — camera QR air-gap and an optional stateless mode. - [Blockstream Jade Plus](https://www.nuri.com/shop/hardware-wallets/blockstream-jade-plus) — $149 · Blockstream — reviewed 4.0/5 Premium aluminium Jade with a bigger screen, camera QR and SD — open-source with a blind-oracle design. - [Foundation Passport Core](https://www.nuri.com/shop/hardware-wallets/foundation-passport-core) — $199 · Foundation Devices — reviewed 4.4/5 Sleek Bitcoin-only air-gapped signer with a keypad and camera. Beautiful and open-source. - [Foundation Passport Prime](https://www.nuri.com/shop/hardware-wallets/foundation-passport-prime) — $299 from · Foundation Devices Broader device: Bitcoin plus 2FA, passkeys and encrypted files. Newer and less battle-tested. - [Keystone 3 Pro](https://www.nuri.com/shop/hardware-wallets/keystone-3-pro) — $129 · Keystone — reviewed 3.9/5 Big air-gapped QR touchscreen with a fingerprint sensor, three secure elements and open-source firmware. - [Tangem Wallet (3-card)](https://www.nuri.com/shop/hardware-wallets/tangem-wallet) — $69 approx · Tangem NFC smart-card wallet with no screen or battery — tap your phone to sign. Simple, but you trust the card. - [Cypherock X1](https://www.nuri.com/shop/hardware-wallets/cypherock-x1) — $199 approx · Cypherock Seedless design: your key is Shamir-split across a set of cards, so there’s no single seed to steal. - [Ellipal Titan 2.0](https://www.nuri.com/shop/hardware-wallets/ellipal-titan-2) — $169 approx · Ellipal Fully air-gapped sealed metal wallet, QR-only, tamper-resistant. Closed hardware, wide coin support. - [SafePal S1](https://www.nuri.com/shop/hardware-wallets/safepal-s1) — $50 approx · SafePal Very cheap air-gapped QR wallet backed by Binance Labs. Budget option with broad coin support. - [OneKey Pro](https://www.nuri.com/shop/hardware-wallets/onekey-pro) — $278 approx · OneKey Open-source touchscreen flagship with fingerprint, camera, NFC and air-gap modes. - [Bitkey](https://www.nuri.com/shop/hardware-wallets/bitkey) — $250 · Block, Inc. Seedless Bitcoin-only 2-of-3 multisig (phone + device + server recovery). Self-custody without a seed phrase. - [NGRAVE Zero](https://www.nuri.com/shop/hardware-wallets/ngrave-zero) — $398 from · NGRAVE EAL7-certified fully air-gapped premium wallet with biometrics — the most security-certified device on the market. - [SeedSigner (DIY kit)](https://www.nuri.com/shop/hardware-wallets/seedsigner) — $65 DIY, approx · Open-source community Stateless open-source DIY air-gap signer built from a Raspberry Pi Zero and a camera. Holds no keys at rest. - [Coinkite Tapsigner](https://www.nuri.com/shop/hardware-wallets/tapsigner) — $20 approx (sale) · Coinkite A tap-to-sign key sealed in a bank-card form factor. Slips into a wallet; pairs with mobile apps over NFC. - [OneKey Classic 1S](https://www.nuri.com/shop/hardware-wallets/onekey-classic-1s) — $99 approx · OneKey Affordable open-source wallet with a secure element and Bluetooth. A budget open-source daily driver. - [OneKey Classic 1S Pure](https://www.nuri.com/shop/hardware-wallets/onekey-classic-1s-pure) — $79 approx · OneKey The cheapest OneKey — an air-gapped variant with no wireless radios at all. - [SafePal S1 Pro](https://www.nuri.com/shop/hardware-wallets/safepal-s1-pro) — $90 approx · SafePal Upgraded air-gapped QR wallet with a better build and battery than the S1. - [SafePal X1](https://www.nuri.com/shop/hardware-wallets/safepal-x1) — $70 approx · SafePal Bluetooth SafePal, now open-source. Cheap and convenient, with a smaller trust story than an air-gap. - [D'CENT Biometric](https://www.nuri.com/shop/hardware-wallets/dcent-biometric) — $119 approx · D'CENT Mobile-first Bluetooth wallet with a fingerprint sensor. Convenient, with a fingerprint you trust the device to hold. - [Arculus](https://www.nuri.com/shop/hardware-wallets/arculus-wallet) — $99 approx · Arculus (CompoSecure) NFC metal card wallet with 3-factor tap-to-sign. Slick, but closed-source and app-dependent. - [GridPlus Lattice1](https://www.nuri.com/shop/hardware-wallets/gridplus-lattice1) — $397 approx · GridPlus Large always-on desktop wallet with swappable SafeCards. Powerful for DeFi/enterprise, overkill for most. - [Ellipal Titan Mini](https://www.nuri.com/shop/hardware-wallets/ellipal-titan-mini) — $89 approx · Ellipal Smaller, cheaper fully air-gapped Ellipal. QR-only, closed hardware, broad coin support. - [Krux (DIY signer)](https://www.nuri.com/shop/hardware-wallets/krux-diy) — $45 DIY, approx · Open-source community Open-source firmware that turns cheap K210 dev boards into an air-gapped QR signer. Maximal verifiability, DIY effort. --- --- title: "Home Miners — Nuri Shop" lang: "en" type: "shop-category" --- # Home Miners Small ASIC miners for the home. Be clear-eyed: against a ~980+ EH/s network these are lottery tickets, heaters and learning tools, not investments. We say so on every listing. ## Products - [Bitaxe Gamma](https://www.nuri.com/shop/miners/bitaxe-gamma) — $175 approx · Open-source (Solo Satoshi et al.) — reviewed 4.3/5 Palm-sized, silent open-source solo miner (~1.2 TH/s at ~15–21W). Best efficiency in the line — and a lottery ticket, honestly. - [Bitaxe Supra](https://www.nuri.com/shop/miners/bitaxe-supra) — $185 approx · Open-source Prior-generation single-chip Bitaxe (~0.6–0.8 TH/s). Only worth it if it’s cheaper than a Gamma. - [Bitaxe Gamma Turbo (GT)](https://www.nuri.com/shop/miners/bitaxe-gamma-turbo) — $350 approx · Open-source Dual-chip Bitaxe (~2.15 TH/s). More hash, more heat and power — still lottery economics. - [NerdQaxe++](https://www.nuri.com/shop/miners/nerdqaxe-plus-plus) — $550 approx · Open-source Quad-chip open-source solo miner (~4.8–6 TH/s at ~72–103W) in a desktop stand. - [Canaan Avalon Nano 3](https://www.nuri.com/shop/miners/avalon-nano-3) — $99 approx · Canaan The cheapest real ASIC home miner (~4 TH/s at 140W). Doubles as a small heater and USB warmer. - [Canaan Avalon Nano 3S](https://www.nuri.com/shop/miners/avalon-nano-3s) — $250 approx · Canaan Better-efficiency quiet desk miner (~6 TH/s at 140W, ~23 J/TH). - [Bitmain Antminer S21](https://www.nuri.com/shop/miners/antminer-s21) — $3,500 approx, market · Bitmain Current-gen efficiency workhorse (~200 TH/s at ~14 J/TH). Needs serious cooling and a strong circuit — loud. - [FutureBit Apollo II](https://www.nuri.com/shop/miners/futurebit-apollo-ii) — $1,199 approx · FutureBit — reviewed 4.0/5 Quiet desktop full node + solo miner in one box (~9–10 TH/s). The sovereignty-appliance pick. - [Heatbit Trio](https://www.nuri.com/shop/miners/heatbit-trio) — $849 approx · Heatbit Living-room heater and air purifier that also mines (~10 TH/s at 400W). The heat is the real product. - [Lucky Miner LV07](https://www.nuri.com/shop/miners/lucky-miner-lv07) — $179 approx · Lucky Miner Cheap pre-assembled Bitaxe-class single-ASIC solo miner (~1 TH/s at ~25W). - [Bitaxe Ultra](https://www.nuri.com/shop/miners/bitaxe-ultra) — $150 approx · Open-source Older single-chip Bitaxe (~0.5 TH/s), superseded by Supra and Gamma. Only for collectors or bargains. - [NerdMiner V2](https://www.nuri.com/shop/miners/nerdminer-v2) — $40 approx · Open-source An ESP32 educational lottery toy (~kilohash-class) with a display. Near-zero odds — pure novelty and learning. - [NerdOctaxe Gamma](https://www.nuri.com/shop/miners/nerdoctaxe-gamma) — $750 approx · Open-source Eight-chip open-source home solo miner (~9–12 TH/s). The most hash in the Nerd line — and louder for it. - [GekkoScience Compac F](https://www.nuri.com/shop/miners/gekkoscience-compac-f) — $90 approx · GekkoScience The best-known USB stick miner (~0.2–0.4 TH/s). Needs a powered hub; a hobby curiosity, not income. - [Bitmain Antminer S19 XP](https://www.nuri.com/shop/miners/antminer-s19-xp) — $1,200 approx, market · Bitmain Prior-gen workhorse (~140 TH/s at ~21 J/TH). The only S19 credible on home power — and still loud and hot. --- --- title: "Node Kits — Nuri Shop" lang: "en" type: "shop-category" --- # Node Kits Plug-and-play Bitcoin nodes. Verify your own transactions, run Lightning, and pair with a hardware wallet for full sovereignty. ## Products - [Umbrel Home](https://www.nuri.com/shop/node-hardware/umbrel-home) — $549 · Umbrel The simplest plug-and-play node with the widest app catalog and Tailscale remote access. - [Umbrel Pro](https://www.nuri.com/shop/node-hardware/umbrel-pro) — $699 · Umbrel Power-user node: up to 16TB, 2.5Gbps networking and WiFi 6. - [Start9 Server One](https://www.nuri.com/shop/node-hardware/start9-server-one) — $899 · Start9 Privacy-maximalist node on a fully auditable open-source OS with an 8-core Ryzen. - [myNode Model Two](https://www.nuri.com/shop/node-hardware/mynode-two) — $599 approx · myNode A Bitcoin-focused node that sits between Umbrel and Start9 in openness and polish. --- --- title: "Steel Backups — Nuri Shop" lang: "en" type: "shop-category" --- # Steel Backups Stamp or tile your recovery seed into stainless steel or titanium so a house fire or flood can’t take your coins with it. ## Products - [Cryptosteel Capsule Solo](https://www.nuri.com/shop/steel-backups/cryptosteel-capsule) — $53 approx · Cryptosteel — reviewed 3.9/5 The original stainless tile capsule, fireproof to ~1400°C. An independent brand — not a Ledger product. - [Blockplate (12/24)](https://www.nuri.com/shop/steel-backups/blockplate) — $35 approx (2-pack ~$69) · Blockplate One-punch marking on a single thick steel plate — the cheapest credible backup. - [Stamp Seed Kit](https://www.nuri.com/shop/steel-backups/stamp-seed-kit) — $100 approx · Stamp Seed Hand-stamp your seed into titanium or steel with a full punch kit. Maximum durability, more effort. - [Coinkite SEEDPLATE 24](https://www.nuri.com/shop/steel-backups/seedplate-24) — $50 approx · Coinkite Center-punch stainless steel plate for a 24-word seed, from the Coldcard makers. - [Keystone Tablet Plus](https://www.nuri.com/shop/steel-backups/keystone-tablet-plus) — $50 approx · Keystone Slotted steel tiles that hold your seed under heat and deformation. - [Billfodl](https://www.nuri.com/shop/steel-backups/billfodl) — $60 approx · Billfodl Stainless steel tile backup, a long-standing Cryptosteel alternative. Waterproof, fireproof, tile-based. - [Tiny Seed (Titanium)](https://www.nuri.com/shop/steel-backups/tiny-seed) — $30 approx · Coinplate / various A credit-card-size stamped titanium backup that fits in a wallet. Minimal, durable, cheap. - [Coldbit Steel](https://www.nuri.com/shop/steel-backups/coldbit-steel) — $50 approx · Coldbit Minimalist stamped steel plates with a clean, no-frills design. --- --- title: "Accessories — Nuri Shop" lang: "en" type: "shop-category" --- # Accessories The extras that round out a self-custody setup — bearer USB sticks, signal-blocking bags, and glanceable Bitcoin displays. ## Products - [Coinkite Blockclock Mini](https://www.nuri.com/shop/accessories/blockclock-mini) — $399 · Coinkite — reviewed 3.2/5 Iconic eInk desk clock: price, block height, Moscow time and sats/dollar. A fun gift — but it needs Wi-Fi and a trusted price API. - [Coinkite Blockclock Micro](https://www.nuri.com/shop/accessories/blockclock-micro) — $175 approx · Coinkite Smaller sibling of the Mini — price, block height and sats/dollar in a compact display. - [Opendime 3-Pack](https://www.nuri.com/shop/accessories/opendime-3pack) — $69 · Coinkite Bearer USB Bitcoin sticks: load once, pass like a physical bill, snap to spend. Trust-minimised cash. - [Coinkite Satscard](https://www.nuri.com/shop/accessories/satscard) — $15 approx · Coinkite An Opendime-style reusable NFC bearer card — tap to check, slide to reveal. - [Mission Darkness Faraday Bag](https://www.nuri.com/shop/accessories/faraday-bag) — $30 from · MOS Equipment Signal-blocking bag that isolates phones, hardware wallets and keys from all wireless signals. - [Coldcard Q + Tapsigner Bundle](https://www.nuri.com/shop/accessories/coldcard-tapsigner-bundle) — $260 approx, bundle · Coinkite A ready-made multisig starter: a Coldcard Q signer plus a Tapsigner card as a second key. - [USB Data Blocker](https://www.nuri.com/shop/accessories/usb-data-blocker) — $12 approx · PortaPow / various A "USB condom" that blocks data lines so you can charge a device without any data connection. - [SeedSigner Case](https://www.nuri.com/shop/accessories/seedsigner-case) — $20 approx · CryptoCloaks A 3D-printed enclosure for a DIY SeedSigner build. Tidy and protective for a bare-board signer. --- --- title: "Payment Wearables — Nuri Shop" lang: "en" type: "shop-category" --- # Payment Wearables Contactless payment wearables (rings, bands, fobs). These are NFC spend devices linked to a card — not Bitcoin key storage. We list them for the everyday-spend side of a Bitcoin life and label them honestly. ## Products - [Starmoon Gen2 Payment Ring](https://www.nuri.com/shop/wearables/starmoon-gen2-ring) — $250 approx · Starmoon Silver-alloy NFC tap-to-pay ring linked to a card. A spend device — not Bitcoin key storage. - [PAGO Payment Ring](https://www.nuri.com/shop/wearables/pago-ring) — $130 approx · PAGO NFC payment ring in several finishes. Contactless spend linked to a card. - [Ceramic Standard Payment Ring](https://www.nuri.com/shop/wearables/ceramic-standard-ring) — $100 approx · Curve line Lightweight ceramic NFC payment ring for everyday tap-to-pay. - [Kinetic Orbit Payment Ring](https://www.nuri.com/shop/wearables/kinetic-orbit-ring) — $65 approx · Kinetic Budget black NFC payment ring — the cheapest way into tap-to-pay wearables. - [Paycelet Payment Bracelet](https://www.nuri.com/shop/wearables/paycelet-bracelet) — $110 approx · Paycelet NFC payment bracelet with a rope band. Tap-to-pay on your wrist. - [Adornpay Payment Key Fob](https://www.nuri.com/shop/wearables/adornpay-keyfob) — $26 approx · Adornpay An NFC payment key fob linked to a card. Tap to pay from your keyring — a spend device, not key storage. - [Architect Payment Smartwatch](https://www.nuri.com/shop/wearables/architect-watch) — $130 approx · Architect An NFC payment smartwatch for contactless spending. A watch with tap-to-pay, not a Bitcoin device. --- --- title: "Apparel — Nuri Shop" lang: "en" type: "shop-category" --- # Apparel Bitcoin-native apparel and merch. Own-brand, comfortable, quietly orange-pilling. Pay with Bitcoin like everything else in the shop. ## Products - [Orange Pill Tee](https://www.nuri.com/shop/apparel/tee-bitcoin-orange) — $32 from · Nuri A soft heavyweight-cotton tee with a subtle Bitcoin mark. Quietly orange-pilling. - [Satoshi Hoodie](https://www.nuri.com/shop/apparel/hoodie-satoshi) — $58 from · Nuri A heavyweight hoodie for cold-storage weather. Understated, warm, brushed inside. - [21M Cap](https://www.nuri.com/shop/apparel/cap-21m) — $30 from · Nuri An embroidered "21M" cap — the supply cap you can wear. - [Stack Sats Socks](https://www.nuri.com/shop/apparel/socks-sats) — $16 from · Nuri Crew socks for stacking sats on your feet. Cushioned, low-key, orange-accented. --- --- title: "Books — Nuri Shop" lang: "en" type: "shop-category" --- # Books The Bitcoin canon — the economics, the history, the technology and the philosophy. Honest notes on what each book is good for and where it falls short. ## Products - [Broken Money — Lyn Alden](https://www.nuri.com/shop/books/book-broken-money) — $24 · Lyn Alden — reviewed 4.6/5 Why the money system is broken and how Bitcoin could fix it — the measured, data-driven macro case. Increasingly the top single recommendation. - [The Bitcoin Standard — Saifedean Ammous](https://www.nuri.com/shop/books/book-bitcoin-standard) — $24 approx · Saifedean Ammous — reviewed 3.4/5 The influential "sound money" case via monetary history. Persuasive, but heavily Austrian-biased and its stock-to-flow model aged badly. - [Mastering Bitcoin (3rd ed.) — Antonopoulos & Harding](https://www.nuri.com/shop/books/book-mastering-bitcoin) — $50 approx · A. Antonopoulos & D. Harding — reviewed 4.4/5 The technical bible: keys, transactions, scripts, mining, SegWit/Taproot/Lightning — with code. Free online, genuinely technical. - [The Internet of Money — Andreas Antonopoulos](https://www.nuri.com/shop/books/book-internet-of-money) — $16 approx · Andreas Antonopoulos Accessible essays on why Bitcoin matters, drawn from Andreas’ best talks. - [Programming Bitcoin — Jimmy Song](https://www.nuri.com/shop/books/book-programming-bitcoin) — $45 approx · Jimmy Song Build Bitcoin from scratch in Python — elliptic curves, transactions, scripts, blocks. - [Grokking Bitcoin — Kalle Rosenbaum](https://www.nuri.com/shop/books/book-grokking-bitcoin) — $45 approx (free online) · Kalle Rosenbaum A visual, illustrated deep-dive into how Bitcoin actually works. Free online. - [Layered Money — Nik Bhatia](https://www.nuri.com/shop/books/book-layered-money) — $18 approx · Nik Bhatia Money as historical "layers," from gold to Bitcoin and Lightning. Short and clarifying. - [The Blocksize War — Jonathan Bier](https://www.nuri.com/shop/books/book-blocksize-war) — $20 approx · Jonathan Bier The inside story of the 2015–17 scaling war — who controls Bitcoin’s rules, and why decentralization won. - [21 Lessons — Gigi](https://www.nuri.com/shop/books/book-21-lessons) — $18 approx (free online) · Der Gigi Philosophical reflections on what Bitcoin teaches about money, time and truth. Free online. - [Inventing Bitcoin — Yan Pritzker](https://www.nuri.com/shop/books/book-inventing-bitcoin) — $12 approx · Yan Pritzker A short, plain-English walk through how Bitcoin was invented, step by step. - [Check Your Financial Privilege — Alex Gladstein](https://www.nuri.com/shop/books/book-financial-privilege) — $18 approx · Alex Gladstein Bitcoin as a human-rights tool in authoritarian and inflationary economies. Reporting from the real world. - [Bitcoin Money: A Tale of Bitville — Michael Caras](https://www.nuri.com/shop/books/book-bitcoin-money-kids) — $18 approx · Michael Caras An illustrated kids’ story that explains sound money through a village that discovers Bitcoin. - [The Price of Tomorrow — Jeff Booth](https://www.nuri.com/shop/books/book-price-of-tomorrow) — $20 approx · Jeff Booth The deflationary case: why technology makes everything cheaper, and what that means for debt-based money. - [Gradually, Then Suddenly — Parker Lewis](https://www.nuri.com/shop/books/book-gradually-then-suddenly) — $22 approx · Parker Lewis A collected first-principles bull case for Bitcoin, essay by essay. Clear and methodical. - [The Genesis Book — Aaron van Wirdum](https://www.nuri.com/shop/books/book-genesis-book) — $22 approx · Aaron van Wirdum The pre-history of Bitcoin: the cypherpunks, digital-cash pioneers and ideas Satoshi assembled. - [Digital Gold — Nathaniel Popper](https://www.nuri.com/shop/books/book-digital-gold) — $18 approx · Nathaniel Popper The narrative history of Bitcoin’s early years — the people, drama and money. Journalistic, not technical. - [The Sovereign Individual — Davidson & Rees-Mogg](https://www.nuri.com/shop/books/book-sovereign-individual) — $20 approx · Davidson & Rees-Mogg A 1997 classic on the digital age and individual sovereignty. Prescient in parts, dated and contrarian in others. --- --- title: "Gift Cards — Nuri Shop" lang: "en" type: "shop-category" --- # Gift Cards Give Bitcoin, or spend it: non-custodial gift cards redeemable at thousands of brands, plus curated orange-pill gift sets. ## Products - [Bitrefill Gift Card](https://www.nuri.com/shop/gift-cards/bitrefill-gift-card) — any amount · Bitrefill Pay with Bitcoin or Lightning, get a redeemable code for 5,000+ brands. Non-custodial, no KYC. - [Orange-Pill Gift Set](https://www.nuri.com/shop/gift-cards/nuri-orange-pill-set) — $129 bundle · Nuri A curated starter gift: a must-read book, a steel backup plate and an Opendime bearer stick. The best way to orange-pill someone. - [Bitcoin Lightning Gift Card](https://www.nuri.com/shop/gift-cards/lightning-gift-card) — any amount · Nuri Gift actual Bitcoin over Lightning — instant, low-fee, redeemable into any Nuri wallet. --- --- title: "Nuri Bitcoin Blog" lang: "en" type: "blog-index" --- # Nuri Bitcoin Blog — honest reviews Genuinely honest, multi-source reviews of Bitcoin hardware. Every review names real weaknesses and cites 10+ sources. ## Reviews - [Broken Money: The Best Money History Book, If You Can Sit Still](https://www.nuri.com/blog/broken-money-review) — 4.6/5. Lyn Alden's dense, engineering-first history of money is the most measured Bitcoin-adjacent book in print, but it is not light reading. - [The Bitcoin Standard: Genre-Defining, and Aging Unevenly](https://www.nuri.com/blog/bitcoin-standard-review) — 3.4/5. The book that made 'hard money' mainstream in Bitcoin is influential, quotable, and heavily biased, and its central scarcity model has not held up. - [Mastering Bitcoin: The Developer Bible That Isn't For Beginners](https://www.nuri.com/blog/mastering-bitcoin-review) — 4.4/5. The definitive technical reference to how Bitcoin actually works, free on GitHub, and genuinely hard going if you don't code. - [Blockclock Mini: A Beautiful $399 Number That Trusts a Server](https://www.nuri.com/blog/coinkite-blockclock-mini-review) — 3.2/5. Coinkite's eInk price-and-block display is a well-built object of desire, but it is a Wi-Fi novelty that leans on a trusted price API, not a trustless device. - [Cryptosteel Capsule: Fireproof and Fiddly, With One Real Weakness](https://www.nuri.com/blog/cryptosteel-capsule-review) — 3.9/5. The original stainless-steel seed capsule survives fire and water in independent testing, but the tile system is tedious and it's the one design that can fail if crushed. - [Bitaxe Gamma: The Honest Case for a $150 Lottery Miner](https://www.nuri.com/blog/bitaxe-gamma-review) — 4.3/5. A silent, open-source ASIC that mines almost no bitcoin in expected value — and is still one of the best gifts you can give a curious hodler. - [FutureBit Apollo II: A Great Node That Also Mines a Lottery](https://www.nuri.com/blog/futurebit-apollo-ii-review) — 4.0/5. One quiet desktop box runs a full Bitcoin node and mines solo — an appealing sovereignty appliance wrapped around miner economics that still don't add up. - [Coldcard Mk4: The Power User's Air-Gapped Bitcoin Vault](https://www.nuri.com/blog/coldcard-mk4-review) — 4.4/5. Dual secure elements, true microSD air-gap and a deep bag of survival features — bundled with a learning curve that will intimidate most newcomers. - [Blockstream Jade Plus: Fully Open, With a Security Model to Understand](https://www.nuri.com/blog/blockstream-jade-plus-review) — 4.0/5. A cheap, fully open-source signer with an excellent QR camera — built on a general-purpose ESP32 and a blind-oracle design you should understand before you trust it. - [Foundation Passport Core: The Air-Gap Purist's Beautiful Signer](https://www.nuri.com/blog/foundation-passport-core-review) — 4.4/5. No USB data, no radios, a phone-like keypad and fully open firmware — a genuinely air-gapped Bitcoin-only wallet that treats design as a feature. - [Ledger Nano X: Slick, Popular, and Still Asking for Trust](https://www.nuri.com/blog/ledger-nano-x-review) — 3.5/5. A polished, Bluetooth-enabled wallet from a company whose security promises have been tested more than once. - [Trezor Safe 5: Open Source Grows Up and Adds a Secure Chip](https://www.nuri.com/blog/trezor-safe-5-review) — 4.2/5. The first genuinely touch-friendly Trezor finally pairs open firmware with a real secure element — but it is no longer the top of the range. - [Coldcard Q: A Bitcoin Fortress That Fights You a Little](https://www.nuri.com/blog/coldcard-q-review) — 4.3/5. Coinkite's keyboard-equipped, air-gappable, Bitcoin-only signer is one of the most serious cold-storage tools made — and one of the least forgiving. - [BitBox02 Bitcoin-only: Swiss, Open, and Refreshingly Boring](https://www.nuri.com/blog/bitbox02-bitcoin-only-review) — 4.4/5. A small, audited, fully open-source Bitcoin wallet that does the fundamentals right and asks little of you — if you can live with the tiny screen. - [Keystone 3 Pro: Big-Screen Air-Gapping With a Trust Asterisk](https://www.nuri.com/blog/keystone-3-pro-review) — 3.9/5. A slick, fully air-gapped QR wallet with three secure chips and a big touchscreen — whose openness and origins deserve a closer look. --- --- title: "Broken Money: The Best Money History Book, If You Can Sit Still" lang: "en" type: "review" product: "book-broken-money" rating: 4.6 --- # Broken Money: The Best Money History Book, If You Can Sit Still _Lyn Alden's dense, engineering-first history of money is the most measured Bitcoin-adjacent book in print, but it is not light reading._ **Rating: 4.6 / 5** ## Verdict Broken Money is a rigorous, technology-driven history of money that earns its Bitcoin conclusions instead of assuming them. It is long, dense, and unmistakably sympathetic to Bitcoin, but Alden argues in good faith and names Bitcoin's own weaknesses. For serious readers it is close to essential; for beginners it can be a slog. ## What's good - Frames money through a rare dual lens: monetary policy AND telecommunications/engineering - Walks 5,000 years of monetary history (shells, gold, telegraph, Eurodollar system, Bitcoin) with clear causal logic - Actually addresses Bitcoin's weaknesses and open questions rather than cheerleading - Backed by Alden's macro track record and heavily cited; ~4.6 average across ~3,000 Goodreads ratings - Strong explanation of the ledger/Eurodollar plumbing most retail books skip ## What's not - 538 pages and genuinely dense; the macro sections can overwhelm finance newcomers - Ultimately pro-Bitcoin; readers who reject the 'fiat is broken' premise will find the framing one-sided - Some critics read the 'debasement is theft' thread as a familiar libertarian narrative - Underplays Bitcoin's volatility and regulatory risk relative to the space it gives the thesis - Repetition in the back half; the argument could land in fewer pages **Buy it if:** Readers who want the single most thorough, good-faith history of money and are willing to work for it. **Skip it if:** Someone wanting a short, neutral primer or who rejects the premise that the fiat system is structurally failing. ## Full review Broken Money sets out to explain not just what money is but why the forms we use keep changing. Alden's organizing idea is that money is a technology, and that whoever controls the fastest ledger controls the monetary system. She traces that thread from seashells and Rai stones through gold, the printing press, the telegraph, and finally the Eurodollar system and Bitcoin. The result is a history that treats settlement speed and communication infrastructure as first-class monetary forces, which is a genuinely different lens from most popular economics writing. The book's biggest strength is that it refuses to pick only one discipline. Alden writes from both a policy seat and an engineering seat, and the combination is what reviewers keep singling out: understanding money usually demands background in both economics and computer science, and few authors carry both. The chapters on the Eurodollar system and the mechanics of correspondent banking are the clearest retail-level treatment of that plumbing you are likely to find, and they matter because they explain why the current system behaves the way it does before Bitcoin is ever seriously introduced. To its credit, Broken Money is not a hype document. Alden spends real pages on Bitcoin's known weaknesses and open problems rather than waving them away, which is why even sympathetic reviewers describe her as analytical rather than a cheerleader. That intellectual honesty is the main reason the book reads as credible: the Bitcoin conclusion arrives only after a long historical argument, so it feels earned rather than assumed. The honest criticisms are real, though. This is a long, information-dense book, and its macro passages can overwhelm anyone new to finance. It is also, unmistakably, a book with a thesis: the fiat system is failing and harder money is the fix. Skeptical readers have flagged that the 'currency debasement is a form of theft from ordinary people' framing echoes a familiar libertarian narrative, and that Alden gives Bitcoin's upside far more room than its volatility and regulatory risk. If you disagree with the premise, you will find the framing one-sided. Reception has been strongly positive but not uncritical. The book sat near the top of Amazon's finance categories on release and holds roughly a 4.6 average across thousands of Goodreads ratings, with reviewers repeatedly calling it the best book of its kind they have read. The recurring complaint, even in glowing reviews, is length and repetition: the argument is sometimes restated more often than it needs to be. Bottom line, Broken Money is the most complete and most measured entry in the 'sound money' canon, and it is a meaningfully better starting point than the more polemical titles in the genre. Just go in knowing it is a commitment, and that its neutrality has limits: it is a very good argument for a particular conclusion, not a survey of all sides. **Bottom line:** The most rigorous and fair-minded money-history book in the Bitcoin canon, provided you have the patience for 500 dense pages. ## In the shop [Broken Money — Lyn Alden](https://www.nuri.com/shop/books/book-broken-money) — $24 ## Sources (11) 1. [Now Available: Broken Money (official author page)](https://www.lynalden.com/broken-money/) — Lyn Alden 2. [Broken Money on Goodreads (rating and reviews)](https://www.goodreads.com/book/show/197566578-broken-money) — Goodreads 3. [Broken Money (hardcover listing, publisher/ISBN)](https://www.amazon.com/Broken-Money-Financial-System-Failing/dp/B0CG83QBJ6) — Amazon 4. [Broken Money (Timestamp Press audiobook edition)](https://www.amazon.com/Broken-Money-Financial-System-Failing/dp/B0CNS7NQLD) — Amazon / Audible 5. [Broken Money book page](https://www.waterstones.com/book/broken-money/lyn-alden/9798988666318) — Waterstones 6. [Broken Money catalog record](https://openlibrary.org/books/OL57486777M/Broken_Money) — Open Library 7. [Broken Money by Lyn Alden Review](https://www.ypa.finance/en/blog/broken-money-lyn-alden-review) — YPA Finance 8. [Book Review: Broken Money by Lyn Alden](https://winchellhouse.com/2025/03/20/book-review-broken-money-by-lyn-alden/) — Winchell House 9. [Book review: Broken Money](https://cjshaver.com/bl0475) — cjshaver.com 10. [Broken Money Book Review (Treasury note risks)](https://www.vantagepointsoftware.com/blog/broken-money-book-review/) — Vantagepoint 11. [Book Review: Broken Money](https://faith-finances.com/blog/2026/6/24/book-review-broken-money) — Faith and Finances Ministry --- --- title: "The Bitcoin Standard: Genre-Defining, and Aging Unevenly" lang: "en" type: "review" product: "book-bitcoin-standard" rating: 3.4 --- # The Bitcoin Standard: Genre-Defining, and Aging Unevenly _The book that made 'hard money' mainstream in Bitcoin is influential, quotable, and heavily biased, and its central scarcity model has not held up._ **Rating: 3.4 / 5** ## Verdict The Bitcoin Standard is the most influential Bitcoin book ever written and a genuinely useful window into how the Bitcoin culture thinks. It is also an Austrian-school polemic that presents contested claims as settled, and its stock-to-flow framing of scarcity directly inspired a price model that later failed badly. Read it as a foundational cultural text, not as neutral economics. ## What's good - Enormously influential; shaped a generation of Bitcoiners and the 'sound money' vocabulary - Clear, forceful writing that makes the scarcity-and-time-preference argument accessible - Good popular history of gold, monetary metals, and the shift off the gold standard - Genuinely useful for understanding the worldview and rhetoric of the Bitcoin community - Published by Wiley with strong sales and staying power; a real reference point for debate ## What's not - Strongly Austrian-school; presents one contested economic tradition as settled truth - The stock-to-flow scarcity framing it popularized underpinned PlanB's price model, which failed (no ~$100k in Dec 2021) - Polemical and dismissive toward Keynesian economics, fiat, and most altcoins/'shitcoins' - Critics (Mises reviewers, David Gerard) flag overreach, cherry-picked history, and weak sourcing - Light on Bitcoin's own technical risks, custody realities, and scaling trade-offs **Buy it if:** Anyone who wants to understand why the Bitcoin community talks the way it does, read critically. **Skip it if:** A reader seeking balanced monetary economics or a technically accurate guide to how Bitcoin works. ## Full review The Bitcoin Standard is, culturally, the most important book Bitcoin has produced. Ammous's core argument is that money competes on 'hardness,' meaning how hard it is to produce more of it, and that gold historically won because of its high stock-to-flow ratio: a large existing supply relative to annual new production. Bitcoin, he argues, is harder still because its issuance is fixed and falls over time. This framing gave the community its vocabulary, from 'sound money' to 'low time preference,' and its influence on Bitcoin discourse is hard to overstate. As a piece of writing it works. Ammous is clear, confident, and quotable, and the popular history of monetary metals and the collapse of the classical gold standard is engaging. Even critics concede the book is effective at what it sets out to do. If your goal is to understand the mindset of the people building and buying Bitcoin, this book is close to required, because so much of that culture is downstream of it. The problems start with what the book presents as settled. It is written squarely from the Austrian school and treats that tradition's conclusions as fact rather than as one contested view among many. Reviewers even in the Austrian-friendly Mises orbit have pushed back on its overreach, and outside critics like David Gerard argue it manufactures theory to defend a rigid gold-standard worldview while dismissing mainstream macroeconomics wholesale. The tone toward fiat, Keynesians, and rival cryptocurrencies is polemical, which makes it persuasive to the converted and easy to distrust for everyone else. The most concrete honesty point is the scarcity model. The book's stock-to-flow framing of why gold and then Bitcoin should be valuable was later turned into an explicit price-prediction model by the pseudonymous analyst PlanB. That model forecast roughly $100k by December 2021; Bitcoin ended that year near $47k, and analysts have since documented how far and how persistently price has diverged from it. Statisticians showed the model's fit relied on autocorrelation and ignored demand entirely. The book did not make that specific prediction, but it supplied the intellectual scaffolding, and that scaffolding has not aged well as a valuation tool. There are also factual and framing complaints throughout, and the book is thin exactly where a shop's customers might want depth: custody, key management, on-chain mechanics, and the real trade-offs of Bitcoin's fixed block space. This is a book about why hard money matters, not a book about how to actually use or secure Bitcoin. So the fair verdict is split. As a movement-defining manifesto and a readable history, The Bitcoin Standard earns its place on the shelf. As economics, it is one-sided advocacy whose signature scarcity model has been discredited as a price predictor. Read it, argue with it, and pair it with something more measured like Broken Money. **Bottom line:** Essential reading to understand Bitcoin culture, but treat it as persuasive advocacy with a broken price model, not settled economics. ## In the shop [The Bitcoin Standard — Saifedean Ammous](https://www.nuri.com/shop/books/book-bitcoin-standard) — $24 approx ## Sources (12) 1. [The Bitcoin Standard on Goodreads](https://www.goodreads.com/en/book/show/36448501) — Goodreads 2. [Review: The Bitcoin Standard](https://mises.org/quarterly-journal-austrian-economics/review-bitcoin-standard-decentralized-alternative-central-banking) — Mises Institute (QJAE) 3. [Review of The Bitcoin Standard (full PDF)](https://qjae.mises.org/article/12292.pdf) — Quarterly Journal of Austrian Economics 4. [Saifedean Ammous: The Bitcoin Standard — the Austrian case for Bitcoin](https://davidgerard.co.uk/blockchain/2018/04/07/saifedean-ammous-the-bitcoin-standard-the-austrian-case-for-bitcoin/) — David Gerard 5. [A Critique of the Bitcoin Stock-to-Flow Model](https://mises.org/mises-wire/critique-bitcoin-stock-flow-model) — Mises Institute 6. [Why the Stock-to-Flow Bitcoin Valuation Model Is Wrong](https://www.coindesk.com/markets/2020/06/30/why-the-stock-to-flow-bitcoin-valuation-model-is-wrong) — CoinDesk 7. [Bitcoin Stock-to-Flow Model is Complete Nonsense, Bloomberg Editor](https://www.ccn.com/bitcoin-stock-flow-model-complete-nonsense-bloomberg-editor/) — CCN 8. [A researcher debunks Stock-to-Flow model](https://cointelegraph.com/news/a-researcher-debunks-stock-to-flow-model-likens-bitcoin-to-a-tech-stock) — Cointelegraph 9. [Bitcoin stock-to-flow PlanB invalidated ($100k by December)](https://protos.com/bitcoin-stock-to-flow-planb-invalidated-100k-by-december-womp-womp/) — Protos 10. [PlanB's Stock-to-Flow model off by $130k since 2021](https://cryptoslate.com/planbs-stock-to-flow-model-off-by-130k-bitcoin-trades-below-trend-since-2021/) — CryptoSlate 11. [The Bitcoin Standard: A review](https://coingeek.com/the-bitcoin-standard-a-review/) — CoinGeek 12. [PlanB's Bitcoin stock to flow model fails](https://wazirx.com/blog/planbs-bitcoin-stock-to-flow-model-fails/) — WazirX Blog --- --- title: "Mastering Bitcoin: The Developer Bible That Isn't For Beginners" lang: "en" type: "review" product: "book-mastering-bitcoin" rating: 4.4 --- # Mastering Bitcoin: The Developer Bible That Isn't For Beginners _The definitive technical reference to how Bitcoin actually works, free on GitHub, and genuinely hard going if you don't code._ **Rating: 4.4 / 5** ## Verdict Mastering Bitcoin is the standard technical reference for how Bitcoin works under the hood, and the Harding-updated 3rd edition modernizes it for Taproot-era Bitcoin. It is superb for developers and technically curious readers, and it is freely available online. But it is emphatically not a beginner's introduction, and buying the print copy is optional given the free text. ## What's good - The most authoritative end-to-end technical explanation of Bitcoin's protocol available - 3rd edition (2023) rewritten by David Harding, modernizing dated 2014/2017 material and adding Taproot/SegWit-era content - Entire text is free on GitHub under a Creative Commons license; print/ebook via O'Reilly is optional - Real code, real transactions, and diagrams; excellent as a working reference, not just a read-through - Widely regarded as the best technical reference in the space by developers ## What's not - Not a beginner book; only the first two chapters are broadly accessible, the rest assumes real technical comfort - Requires programming/command-line familiarity to get full value from the examples - Fast-moving subject means any print edition risks drifting out of date (the free repo stays current) - Narrow scope: it explains the technology, not investing, custody strategy, or economics - Dense and reference-like; not designed to be read cover to cover casually **Buy it if:** Developers, engineers, and technically-minded readers who want to understand Bitcoin at the protocol level. **Skip it if:** A newcomer wanting a plain-language 'what is Bitcoin and should I buy it' introduction. ## Full review Mastering Bitcoin is the book developers point newcomers-to-the-code toward, and for good reason. It explains Bitcoin from keys and addresses through transactions, scripts, the mempool, mining, and consensus, with enough precision that you come away understanding how the machine actually runs rather than just what it is for. O'Reilly and reviewers consistently describe it as the best technical reference on Bitcoin available, and that reputation is deserved. The 3rd edition matters because Bitcoin changed a lot after the earlier versions. This edition was written by David A. Harding, building on Andreas Antonopoulos's first two editions, with a stated focus on modernizing the 2017 second edition and the leftover 2014 first-edition material. That refresh brings the text closer to modern Bitcoin, including SegWit and Taproot-era concepts, which is exactly where the older editions had started to show their age. A genuinely important buying note: you do not have to buy it. The complete text of the 3rd edition is published free on GitHub under a Creative Commons license (initially non-commercial/no-derivatives, later moving to a more permissive share-alike license), and you can read every chapter in the browser. The O'Reilly paperback and ebook are for people who prefer a bound copy or want to support the authors. For a Bitcoin shop that's worth stating plainly rather than hiding. The honest limitation is audience. The book itself says the first two chapters are for everyone and the rest is aimed at developers, engineers, and systems architects, and that is accurate. If you can't read a bit of code or aren't comfortable at a command line, large stretches will wash over you. This is not a knock on the book; it is simply not trying to be a gentle primer, and pretending otherwise sets buyers up for frustration. Scope is also narrow by design. Mastering Bitcoin explains the technology and almost nothing else. There is no meaningful coverage of price, investing, custody strategy for ordinary users, or the monetary-economics debates that books like Broken Money and The Bitcoin Standard center on. Pair it accordingly. The other structural caveat is freshness. Bitcoin's tooling and best practices move quickly, so any static print edition drifts over time; the living GitHub repository is the version that stays current. Bottom line: for the right reader this is a five-star, career-useful reference, and the free online availability makes it an easy recommendation. Just make sure the buyer is actually the technical reader this book is written for. **Bottom line:** The definitive protocol-level Bitcoin reference and free online, but a developer's book, not a beginner's on-ramp. ## In the shop [Mastering Bitcoin (3rd ed.) — Antonopoulos & Harding](https://www.nuri.com/shop/books/book-mastering-bitcoin) — $50 approx ## Sources (11) 1. [bitcoinbook/bitcoinbook — Mastering Bitcoin 3rd Edition (repo)](https://github.com/bitcoinbook/bitcoinbook) — GitHub 2. [BOOK.md — read the full text in-browser](https://github.com/bitcoinbook/bitcoinbook/blob/develop/BOOK.md) — GitHub 3. [Mastering Bitcoin releases](https://github.com/bitcoinbook/bitcoinbook/releases) — GitHub 4. [Mastering Bitcoin, 3rd Edition](https://www.oreilly.com/library/view/mastering-bitcoin-3rd/9781098150082/) — O'Reilly Media 5. [Mastering Bitcoin, 2nd Edition](https://www.oreilly.com/library/view/mastering-bitcoin-2nd/9781491954379/) — O'Reilly Media 6. [Introduction (Chapter 1, audience note)](https://www.oreilly.com/library/view/mastering-bitcoin-2nd/9781491954379/ch01.html) — O'Reilly Media 7. [Mastering Bitcoin on Goodreads](https://www.goodreads.com/book/show/30955996-mastering-bitcoin) — Goodreads 8. [Book Review: Mastering Bitcoin](https://www.asisonline.org/security-management-magazine/articles/2018/05/book-review-mastering-bitcoin/) — ASIS / Security Management 9. [Mastering Bitcoin (catalog entry)](https://dl.acm.org/doi/10.5555/2695500) — ACM Digital Library 10. [Mastering Bitcoin 3rd Edition released on GitHub (announcement)](https://www.patreon.com/posts/major-mastering-97367320) — Andreas M. Antonopoulos (Patreon) 11. [Mastering Bitcoin, 3rd Edition (free access listing)](https://freecomputerbooks.com/Mastering-Bitcoin.html) — FreeComputerBooks --- --- title: "Blockclock Mini: A Beautiful $399 Number That Trusts a Server" lang: "en" type: "review" product: "blockclock-mini" rating: 3.2 --- # Blockclock Mini: A Beautiful $399 Number That Trusts a Server _Coinkite's eInk price-and-block display is a well-built object of desire, but it is a Wi-Fi novelty that leans on a trusted price API, not a trustless device._ **Rating: 3.2 / 5** ## Verdict The Blockclock mini is a genuinely nice-looking eInk display from a respected hardware maker, and as an ambient block-height and price ticker it does its one job well. But at $399 it is a luxury novelty that needs Wi-Fi and pulls its price from a third-party exchange API, so it is not the trustless, verify-it-yourself device some buyers assume. Buy it for the vibe, not for sovereignty. ## What's good - Clean 7-digit eInk display that's readable and low-glare; genuinely attractive on a desk or shelf - From Coinkite, the well-regarded maker of COLDCARD, Opendime and other self-custody hardware - Flexible: shows block height, price, Moscow time, Opendime balances, QR codes and custom API messages - Opendime balance math is done on the device, so your balance isn't handed to Coinkite's server - Update cadence is configurable (from ~5 minutes up to hourly, or synced to new blocks) ## What's not - $399 for what is fundamentally a single-purpose novelty display - Requires Wi-Fi and an internet connection; it is not an offline or air-gapped device - Price data comes from a third-party exchange API, so the headline number relies on a trusted source, not trustless verification - It is not a full node and does not independently validate the chain (unlike node-style clocks such as Block Clock Jr.) - Phones out to fetch blocks and rates, so it is not a privacy-neutral fixture - Pure ornament: it holds no keys and does nothing for your actual custody security **Buy it if:** Bitcoiners who want a tasteful ambient price/block-height display and don't mind paying a premium for the object. **Skip it if:** Anyone expecting a trustless, self-validating, or offline device, or who wants function over decoration. ## Full review The Blockclock mini is easy to like on sight. It's a roughly 30x10 cm slab with seven eInk digits from Coinkite, the Canadian maker behind the COLDCARD hardware wallet, Opendime and Satscard. That pedigree shows in the build and the software polish, and the eInk panel is the right call for something meant to sit on a shelf all day: crisp, low-glare, and comfortable to glance at. As an ambient object it delivers exactly the calm, always-on Bitcoin ticker it promises. It's also more flexible than a one-trick ticker. You can cycle it through current block height, spot price in your chosen fiat, 'Moscow time' (sats per dollar), Opendime balances, deposit QR codes, and custom messages pushed via API. Refresh cadence is configurable from around five-minute updates up to hourly, or you can sync it to fire on each new block. For the intended use, decorating a desk or a shop counter with live network data, it's well thought out. The honesty starts with what it is: a $399 novelty. That is real money for a device whose entire job is to show a number you can already see for free on your phone or any block explorer. Coinkite doesn't hide this, and plenty of owners are happy paying for the aesthetic, but a shop should be upfront that you're buying an ornament, not a tool that improves your security or custody in any way. It holds no keys and does nothing for self-custody. The more important caveat is the trust model. The Blockclock mini needs your Wi-Fi and an internet connection to work at all, and the price it displays is fetched from a third-party exchange API of your choosing. That means the headline BTC price is only as trustworthy as that external source; the clock is not independently verifying anything about price. Calling it 'trustless' would be wrong. It's a networked display that trusts servers, which is fine for a decoration but worth stating plainly. To Coinkite's credit, there is a real privacy nuance in its favor: for Opendime balances the fiat conversion is computed on the device, so your balance figure isn't shipped off to their backend. That's a thoughtful touch. But the device still reaches out over the internet to pull block data and exchange rates, so it isn't a privacy-neutral fixture, and it is not a full node. If you want a clock that actually validates the chain itself, node-style projects like the Block Clock Jr. are a different category of device. So the verdict is narrow but fair. If you want a beautiful, well-made ambient Bitcoin display from a trusted manufacturer and the price doesn't faze you, the Blockclock mini is a lovely object that does its job. Just go in clear-eyed: it's a premium novelty that depends on Wi-Fi and a trusted price feed, not a sovereignty tool. **Bottom line:** A gorgeous, well-built $399 desk ornament that trusts a Wi-Fi price API, worth it for the vibe, not for trustlessness. ## In the shop [Coinkite Blockclock Mini](https://www.nuri.com/shop/accessories/blockclock-mini) — $399 ## Sources (11) 1. [BLOCKCLOCK mini — official product page](https://blockclockmini.com/) — Coinkite 2. [BLOCKCLOCK mini — store listing and price](https://store.coinkite.com/store/bc-mini) — Coinkite Store 3. [BLOCKCLOCK category (mini/micro)](https://store.coinkite.com/store/category/blockclock) — Coinkite Store 4. [BLOCKCLOCK mini User Documentation (data sources, on-device balance math)](https://blockclockmini.com/docs.html) — Coinkite 5. [The BLOCKCLOCK (overview)](https://getblockclock.com/) — Coinkite / getblockclock 6. [Blockclock MINI/MICRO Update with BitcoinTreasuries.net](https://blog.coinkite.com/blockclock-upgrade-123/) — Coinkite Blog 7. [Coinkite (maker of COLDCARD, Opendime, etc.)](https://coinkite.com/) — Coinkite 8. [Twitter Reacts To Jack Dorsey's Bitcoin Blockclock ($399, how it works)](https://www.ibtimes.com/twitter-reacts-jack-dorseys-bitcoin-blockclock-how-does-it-work-3169764) — International Business Times 9. [The BLOCKCLOCK Mini and Micro Review](https://www.bitcoinlearning.org/the-blockclock-mini-and-micro-review/) — BitcoinLearning.org 10. [The Bitcoin Block Clock Jr. Is Half Full Node, Half Work Of Art (node-based alternative)](https://bitcoinmagazine.com/culture/bitcoin-block-clock-jr-half-full-node-half-work-art) — Bitcoin Magazine 11. [BLOCKCLOCK micro (compact sibling)](https://blockclockmicro.com/) — Coinkite --- --- title: "Cryptosteel Capsule: Fireproof and Fiddly, With One Real Weakness" lang: "en" type: "review" product: "cryptosteel-capsule" rating: 3.9 --- # Cryptosteel Capsule: Fireproof and Fiddly, With One Real Weakness _The original stainless-steel seed capsule survives fire and water in independent testing, but the tile system is tedious and it's the one design that can fail if crushed._ **Rating: 3.9 / 5** ## Verdict The Cryptosteel Capsule is a well-built, independently made stainless-steel seed backup that has passed serious fire and water stress tests, including Jameson Lopp's long-running series. Its weaknesses are real and specific: the loose-tile assembly is tedious and error-prone, and it is more vulnerable to crushing than solid engraved plates. A strong choice if you assemble it carefully; not the most crush-proof option out there. ## What's good - Solid 303/304 stainless construction; independently rated fireproof to very high temperatures (well above a typical house fire) - Passed fire-plus-water-quench testing in Jameson Lopp's independent stress-test series - Made by Cryptosteel, an established independent brand, not tied to any single wallet vendor like Ledger - Modular tiles let you back up any BIP39 seed length and correct mistakes without re-buying - Waterproof and corrosion-resistant; the common-core design keeps tiles together even under stress ## What's not - Loose-letter tile assembly is genuinely tedious and easy to get wrong (misordered or dropped tiles) - Reading the seed back is fiddly due to tile orientation and spacing - More vulnerable to crushing than solid engraved/stamped plates; it yielded under a 20-ton press in testing - A misplaced fastener/closing tile can risk data loss, a failure mode reviewers have flagged - Pricier and slower to set up than a simple stamped washer-plate kit **Buy it if:** Self-custody users who want a proven, brand-neutral steel backup and will take time to assemble it carefully. **Skip it if:** Someone who wants the most crush-resistant, fastest-to-set-up, or cheapest metal backup available. ## Full review The Cryptosteel Capsule is the product that more or less created the metal-seed-backup category, and it still holds up. It's a stainless-steel tube into which you load individual engraved letter tiles to spell out your recovery seed, then seal it. The appeal is durability: paper burns and rots, but a stainless capsule is meant to survive the house fire and the flood that would destroy a written backup. For anyone practicing real self-custody, moving the seed off paper is one of the highest-value things you can do, and this is a credible way to do it. On the durability claims, there's independent evidence rather than just marketing. Jameson Lopp's multi-round 'Metal Bitcoin Seed Storage Stress Test' series, the most cited independent testing in this space, subjects devices to fire and then a water quench (because real fires are usually put out with water, and rapid cooling is its own stress). The Cryptosteel Capsule has been part of that testing, and stainless capsule designs like it generally clear the fire-and-water bar that matters for a home disaster. Cryptosteel's own lab figures cite resistance well above typical house-fire temperatures. Worth stating clearly for buyers: Cryptosteel is an independent brand, not a Ledger product. There's frequent confusion because Ledger has at times sold co-branded 'Cryptosteel' units, but the Capsule reviewed here is the standalone stainless product, and choosing it doesn't tie you to any single wallet vendor's ecosystem. That brand-neutrality is a plus for people who don't want their backup coupled to one company. Now the honest downsides, and they're about usability. The loose-tile system is tedious. You sort through a bag of letter tiles, slide them onto a core in the exact right order, and hope you don't drop or transpose one. Reviewers consistently note it takes real focus, and that reading the seed back later is fiddly because of how the tiles sit and space out. It's doable in under half an hour, but it is the opposite of quick, and the error surface is entirely on you. The one substantive engineering weakness is crushing. Independent crush testing found the Capsule holds up to several tons but eventually deforms and gives way under a roughly 20-ton press, and solid stamped or engraved plates tend to do better against pure crushing force. There's also a specific failure mode reviewers have flagged: if the closing/fastener tile is placed incorrectly, you can risk the tiles coming loose, meaning assembly discipline isn't just tedium, it's a data-integrity issue. The saving grace is that the tiles share a common core, so partial damage usually doesn't scatter your seed. Balanced, the Cryptosteel Capsule is a very good backup with clearly understood limits. It survives the disasters most people actually face (fire, water, corrosion), it's made by an established independent maker, and it flexibly handles any seed length. If your threat model prioritizes maximum crush resistance or you want the fastest possible setup, a solid engraved-plate kit may suit you better. For everyone else, this is a proven, sensible choice, as long as you assemble it slowly and double-check every tile. **Bottom line:** A proven, brand-neutral stainless seed backup that shrugs off fire and water, but it's fiddly to assemble and not the most crush-proof design. ## In the shop [Cryptosteel Capsule Solo](https://www.nuri.com/shop/steel-backups/cryptosteel-capsule) — $53 approx ## Sources (12) 1. [Cryptosteel Capsule Review (independent review page)](https://jlopp.github.io/metal-bitcoin-storage-reviews/reviews/cryptosteel-capsule/) — Jameson Lopp — Metal Bitcoin Storage Reviews 2. [Metal Bitcoin Seed Storage Stress Test (original round)](https://blog.lopp.net/metal-bitcoin-seed-storage-stress-test/) — Jameson Lopp (blog.lopp.net) 3. [Metal Bitcoin Seed Storage Stress Test (Part II)](https://blog.lopp.net/metal-bitcoin-seed-storage-stress-test-part-ii/) — Jameson Lopp (blog.lopp.net) 4. [Metal Bitcoin Seed Storage Stress Test (Round III, adds water quench)](https://blog.lopp.net/metal-bitcoin-seed-storage-stress-test-round-iii/) — Jameson Lopp (blog.lopp.net) 5. [Metal Bitcoin Seed Storage Stress Test (Round V)](https://blog.lopp.net/metal-bitcoin-seed-storage-stress-tests-round-v/) — Jameson Lopp (blog.lopp.net) 6. [Cryptosteel Seed System / metal backup (official)](https://cryptosteel.com/seed-system-metal-backup/) — Cryptosteel 7. [The Block Review: Cryptosteel Capsule](https://www.theblock.co/post/45364/the-block-review-cryptosteel-capsule) — The Block 8. [Cryptosteel Capsule Review](https://billfodl.com/blogs/billfodl/cryptosteel-capsule-review) — Billfodl 9. [Cryptosteel Capsule Review (security, price, durability)](https://www.hardware-wallets.net/cryptosteel-capsule-review/) — Hardware-Wallets.net 10. [Cryptosteel Capsule Review (crush/fire testing notes)](https://buybitcoinworldwide.com/cryptosteel/) — BuyBitcoinWorldwide 11. [Cryptosteel Capsule Review: Steel-Based Wallet Protection](https://www.bitdegree.org/crypto/cryptosteel-capsule-review) — BitDegree 12. [7 Steel Crypto Wallets That Withstand Extreme Fire and Water Damage](https://news.bitcoin.com/7-steel-crypto-wallets-that-withstand-extreme-fire-and-water-damage/) — News.Bitcoin.com --- --- title: "Bitaxe Gamma: The Honest Case for a $150 Lottery Miner" lang: "en" type: "review" product: "bitaxe-gamma" rating: 4.3 --- # Bitaxe Gamma: The Honest Case for a $150 Lottery Miner _A silent, open-source ASIC that mines almost no bitcoin in expected value — and is still one of the best gifts you can give a curious hodler._ **Rating: 4.3 / 5** ## Verdict The Bitaxe Gamma is a beautifully executed, fully open-source solo miner that runs silent on 15-18W. Just be clear-eyed: against a ~900+ EH/s network, a single unit's expected earnings round to zero, and a real block win is a roughly-once-in-17,000-years event per device. Buy it as a heater, a teaching tool, and a lottery ticket — not as an investment. ## What's good - Fully open-source hardware and AxeOS firmware — schematics, PCB and code are public and auditable - Genuinely silent and low-power: ~1.2 TH/s at ~15-18W on the BM1370 ASIC (the same chip family as the Antminer S21 Pro) - Solo mining to a no-fee pool like Public Pool means you keep 100% of any block you find - Cheap ($60-$150) and self-contained: standard wall power, 2.4GHz WiFi, USB-C firmware flashing - Real solo wins do happen — a Bitaxe Gamma took block #957382 for 3.1382 BTC in July 2026 - Excellent education device: you learn stratum, difficulty, pools and firmware hands-on ## What's not - Expected value is effectively negative — you pay electricity to mine statistically nothing - Mean time-to-block for one ~1 TH/s unit is on the order of 17,000 years against the current network - The win everyone cites was one lucky household out of an enormous population of miners — survivorship bias is real - No secondary income stream: pointed at a pooled payout pool it earns only pennies per day - Overclocking for more hashrate raises heat, noise and failure risk with no change to the underlying lottery - It is a hobbyist board, not a supported appliance — you are your own tech support **Buy it if:** Tinkerers and hodlers who want to learn how mining actually works and enjoy holding a real, no-KYC lottery ticket. **Skip it if:** Anyone expecting the device to pay for itself or generate reliable income. ## Full review Start with the honest math, because everything else follows from it. Bitcoin's network hovered near 980 EH/s in early July 2026 and drifted around 866-908 EH/s later in the month. A single Bitaxe Gamma contributes roughly 1 TH/s — about one part in nine hundred million of that total. Multiply that share across a year of blocks and the expected number of blocks you find is a tiny fraction of a percent, which is another way of saying the mean time between wins for one unit is measured in tens of thousands of years. No firmware tweak changes this; it is arithmetic, not a settings problem. So why is this still a 4.3-star product? Because it is honest about what it is, and it executes that role beautifully. The Bitaxe is the world's first fully open-source ASIC miner, started by an engineer known as Skot in 2023. The hardware lives at github.com/skot/bitaxe and the AxeOS firmware at github.com/skot/ESP-Miner, both public and auditable. You are not trusting a black box — you can read every line, flash it over USB-C, and watch the dashboard on your LAN. For a device class historically dominated by opaque industrial gear, that transparency is rare and valuable. The engineering is legitimately good. The Gamma runs the BM1370 ASIC harvested from Bitmain's S21 Pro line, delivering roughly 1.2 TH/s at 15-18W, or about 14-15 J/TH. A single 40mm fan keeps it near-silent, so it sits on a desk or shelf without annoying anyone. It sips power comparable to a small light bulb and doubles as a modest space heater — waste heat you were arguably going to spend on heating anyway, which softens the running-cost argument in winter. The lottery is real, not theoretical — that is the seductive part. On July 9, 2026, a solo miner running a single Bitaxe Gamma at about 995 GH/s for roughly eight hours mined block #957382 through Public Pool and collected the full 3.1382 BTC (subsidy plus fees), worth around $200,000 at the time. It happened. It also happens to almost no one: for every winner there is an effectively uncountable crowd of identical devices that will run for years and find nothing. Both statements are true at once, and any honest review has to hold them together. Set expectations correctly and it is hard to be disappointed. Point it at a no-fee solo pool and you keep everything if lightning strikes; point it at a shared pool and you will earn a few cents a day in steady, unexciting payouts. Neither path is a business. Treat the purchase price as the cost of the ticket and the electricity as the cost of playing, and you will enjoy the device for what it delivers: a tangible, sovereign, no-KYC connection to the network and a genuine, if microscopic, shot at a jackpot. Practical caveats: this is hobbyist hardware, so you are your own support desk, and community firmware moves fast. Overclocking chases higher numbers at the cost of heat, noise and chip longevity without improving your odds in any meaningful way — the network is simply too large. Buy one because you want to learn, to hold a real lottery ticket, and to run a warm, quiet, fully open piece of the Bitcoin network on your desk. Buy several only if you enjoy the game, not because more of them meaningfully changes the odds. **Bottom line:** A superb open-source lottery-and-education device that will almost certainly never pay you back — and is worth owning anyway if you know that going in. ## In the shop [Bitaxe Gamma](https://www.nuri.com/shop/miners/bitaxe-gamma) — $175 approx ## Sources (13) 1. [Bitaxe — Official Project Site](https://www.bitaxe.org/) — Bitaxe 2. [skot/bitaxe — Open source ASIC Bitcoin miner hardware](https://github.com/skot/bitaxe) — GitHub 3. [skot/ESP-Miner — AxeOS mining firmware](https://github.com/skot/ESP-Miner) — GitHub 4. [bitaxeorg/bitaxegamma — BM1370 Gamma reference design](https://github.com/bitaxeorg/bitaxegamma) — GitHub 5. [Bitaxe Gamma 1.2 TH/s Solo Miner — product & specs](https://www.solosatoshi.com/product/bitaxe-gamma/) — Solo Satoshi 6. [Bitaxe Gamma 601 realtime profit, specs & cost](https://miningnow.com/asic-miner/bitaxe-gamma-601-1-2th-s/) — Mining Now 7. [Solo BTC miner makes $200,000 using $150 equipment](https://www.coindesk.com/markets/2026/07/14/solo-btc-miner-makes-usd200-000-using-usd150-equipment) — CoinDesk 8. [Solo bitcoin miner turns $150 Bitaxe into a $200,000 block reward](https://cryptobriefing.com/solo-bitcoin-miner-bitaxe-200000-block-reward/) — Crypto Briefing 9. [Bitcoin's Lottery Jackpot: Solo Home Miner Wins $200,000](https://news.bitcoin.com/bitcoins-lottery-jackpot-solo-home-miner-wins-200000-with-a-150-mining-device/) — Bitcoin.com News 10. [Bitcoin Block #957382](https://mempool.space/block/957382) — mempool.space 11. [Public Pool — block find announcement](https://x.com/Public_Pool_BTC/status/2075431013497356538) — Public Pool (X) 12. [Bitcoin Hashrate Chart 2026](https://www.coinwarz.com/mining/bitcoin/hashrate-chart) — CoinWarz 13. [AxeOS Complete Guide: Bitaxe Firmware Settings Explained](https://d-central.tech/axeos-complete-guide-bitaxe-firmware-settings-explained/) — D-Central --- --- title: "FutureBit Apollo II: A Great Node That Also Mines a Lottery" lang: "en" type: "review" product: "futurebit-apollo-ii" rating: 4 --- # FutureBit Apollo II: A Great Node That Also Mines a Lottery _One quiet desktop box runs a full Bitcoin node and mines solo — an appealing sovereignty appliance wrapped around miner economics that still don't add up._ **Rating: 4.0 / 5** ## Verdict The Apollo II is the most polished full-node-plus-miner appliance you can buy: a 6-core ARM computer syncing a full node next to a 6-10 TH/s ASIC, all near-silent in Eco mode. As a node it earns its keep. As a miner its efficiency is mediocre and its solo economics are still a lottery — just a slightly bigger ticket than a Bitaxe. ## What's good - Two products in one: a full Bitcoin node and a solo miner in a single quiet desktop unit - Runs a real full node on a 6-core ARM system with 1-2TB NVMe, giving you independent transaction verification - Built-in one-toggle solo Stratum pool — solo mine straight to your own node, no external pool required - Genuinely quiet in Eco mode (under ~40 dB); vapor-chamber cooling handles the heat well - Plug-and-play Apollo OS 2.0 — WiFi and a wall outlet is the whole setup - Flexible power band: ~6 TH/s Eco up to ~9-10 TH/s Turbo depending on your noise and heat tolerance ## What's not - Mining efficiency is weak by modern standards — roughly 28 J/TH versus ~15 J/TH for current industrial ASICs - Solo economics remain a lottery: ~9 TH/s still implies a mean time-to-block on the order of ~2,000 years - Turbo mode gets loud (~55 dB) and hot — the quiet number and the fast number are not the same mode - Much more expensive than a Bitaxe, so the 'lottery ticket' costs several times more per unit - As an ASIC it will not earn back its price mining bitcoin at home in any realistic scenario - Most of its lasting value is the node — which you could run on far cheaper hardware if you skipped mining **Buy it if:** Sovereignty-minded users who want one attractive, quiet box that verifies their own transactions and lets them play the solo-mining lottery on the side. **Skip it if:** Anyone buying it primarily to earn bitcoin, or who needs competitive mining efficiency. ## Full review The Apollo II's best trick is combining two things people usually run separately. Inside one 6-inch aluminum desktop box sits a modern 6-core ARM Linux computer with 1-2TB of NVMe storage and a 5nm ASIC hash unit. The ARM side quietly syncs and runs a full Bitcoin node; the ASIC side mines. FutureBit's pitch is sovereignty as an appliance: verify your own transactions and, optionally, point hashrate at your own node with a single toggle that spins up a local solo Stratum pool. For a lot of people that integration is the entire appeal, and it is well executed. As a node, it is easy to recommend. You get independent verification without babysitting a Raspberry Pi build, running on Apollo OS 2.0 with the storage and horsepower to stay synced comfortably. If you value not trusting someone else's node to tell you your balance or to broadcast your transactions, that capability alone is real and durable — it keeps delivering value long after any mining novelty wears off. This is where most of the four stars come from. As a miner, the honesty gets harder. The hash unit does 6 TH/s in Eco mode and up to about 9-10 TH/s in Turbo, drawing roughly 400W at around 28 W/TH. That efficiency is well behind today's best industrial machines near 15 J/TH, which means at home electricity rates you are usually paying more in power than the tiny pooled payout returns. It is not a money machine; it is a heater that occasionally hashes for a jackpot. And the jackpot is still a lottery. Nine terahashes is roughly nine Bitaxe Gammas, so your odds improve by that factor — but against a network near 900 EH/s to nearly 1 ZH/s, nine times almost-nothing is still almost-nothing. The implied mean time between solo blocks for one Apollo II is on the order of a couple of thousand years. Solo mining to your own node is a lovely, sovereign way to buy that ticket, and the built-in toggle makes it trivial, but no framing changes the underlying probability. The noise story deserves a caveat too, because the marketing-friendly 'quiet' figure and the exciting 'fast' figure describe different modes. Eco mode is genuinely living-room quiet under about 40 dB; Turbo mode climbs to roughly 55 dB and runs noticeably hotter. You can have quiet or you can have maximum hashrate, not both at once, so plan around where the box will actually live. Net-net: buy the Apollo II if you want a single elegant appliance that gives you a full node plus the option to play the solo lottery, and you have made peace with mining being a cost center rather than a profit center. If your only goal is to earn bitcoin, this hardware will not get you there, and if your only goal is a node, cheaper hardware does that job. Its value is the combination and the polish — which, for the right buyer, is genuinely worth it. **Bottom line:** An excellent quiet node appliance with a solo miner bolted on — buy it for sovereignty and fun, not for a return on investment. ## In the shop [FutureBit Apollo II](https://www.nuri.com/shop/miners/futurebit-apollo-ii) — $1,199 approx ## Sources (12) 1. [Introducing Apollo II](https://www.futurebit.io/apollo-ii) — FutureBit 2. [Apollo II — Desktop Full Node System and Home Miner (product)](https://shop.futurebit.io/products/apollo-ii-next-generation-home-miner-and-desktop-full-node-system) — FutureBit Shop 3. [Apollo II vs Bitmain Antminer: Price, Efficiency & Everything Else](https://www.futurebit.io/blog/futurebit-apollo-ii-vs-bitmain-antminer-price-efficiency-amp-everything-else) — FutureBit Blog 4. [Apollo Solo Bitcoin Miner](https://www.futurebit.io/solo-bitcoin-miner) — FutureBit 5. [FutureBit Apollo II Full Node (9 TH/s) — product](https://bitcoinmerch.com/products/apollo-ii-next-generation-desktop-full-node-system-and-home-miner-9th-s) — Bitcoin Merch 6. [FutureBit Apollo II BTC Founders Edition — hands-on review](https://bitcointalk.org/index.php?topic=5492150.0) — Bitcointalk 7. [FutureBit Apollo II is More than Just a Bitcoin ASIC Miner](https://bloodys.medium.com/futurebit-apollo-ii-is-more-than-just-a-bitcoin-asic-miner-for-home-users-117f786ac082) — Medium (Bloodys) 8. [FutureBit Apollo II Full Node — product listing](https://www.amazon.com/Futurebit-Apollo-II-Full-Node/dp/B0D8RC4VRW) — Amazon 9. [FutureBit Apollo II Full Node Bitcoin Miner — overview](https://www.gadgetify.com/futurebit-apollo-ii-home-miner/) — Gadgetify 10. [Apollo BTC Support](https://www.futurebit.io/apollo-btc-support) — FutureBit 11. [Is Bitcoin Mining Profitable in 2026?](https://startmining.io/en/blog/is-bitcoin-mining-profitable-2026) — Startmining 12. [Bitcoin Hashrate Chart 2026](https://www.coinwarz.com/mining/bitcoin/hashrate-chart) — CoinWarz --- --- title: "Coldcard Mk4: The Power User's Air-Gapped Bitcoin Vault" lang: "en" type: "review" product: "coldcard-mk4" rating: 4.4 --- # Coldcard Mk4: The Power User's Air-Gapped Bitcoin Vault _Dual secure elements, true microSD air-gap and a deep bag of survival features — bundled with a learning curve that will intimidate most newcomers._ **Rating: 4.4 / 5** ## Verdict The Coldcard Mk4 is arguably the most security-obsessed Bitcoin-only signer on the market: dual secure elements from two vendors, fully air-gapped microSD signing, and open-source firmware you can verify. That power comes with real complexity and a steeper learning curve than any mainstream wallet — this is a tool for people who want to understand exactly what they're doing. ## What's good - Truly air-gapped signing over microSD (PSBT) — you never have to plug it into a computer - Dual secure elements from two different vendors (Microchip ATECC608 + Maxim DS28C36B) reduce single-supplier risk - Open-source firmware with reproducible builds you can verify yourself - Deep power-user toolkit: BIP85 seeds, duress and 'brick-me' PINs, seed XOR, PSBT, multisig - Bitcoin-only by design — smaller attack surface and cleaner, more focused firmware - Long track record: Coinkite has shipped and iterated Coldcard since 2017 ## What's not - Steep learning curve — the feature depth that experts love will overwhelm beginners - The secure-element chips themselves are proprietary and NDA-bound, so that layer isn't fully open - It also ships with USB and NFC; it's only a strict air-gap if you deliberately avoid or disable them - Around $160, roughly double the price of several mainstream hardware wallets - Bitcoin-only means it's useless if you also hold other assets (a feature for some, a limit for others) - Documentation is thorough but assumes technical competence you may not yet have **Buy it if:** Experienced, self-custody-serious Bitcoiners who want maximum control, air-gapped signing and advanced backup schemes. **Skip it if:** Beginners who want a simple tap-and-go wallet, or anyone holding coins other than Bitcoin. ## Full review Coldcard has spent since 2017 building a reputation as the signer for people who take custody seriously, and the Mk4 is the maturation of that philosophy. It is Bitcoin-only on purpose: Coinkite argues that dropping every other asset shrinks the attack surface and keeps the firmware focused. Whether or not you agree, the result is a device whose entire design budget goes toward one job — protecting Bitcoin keys — rather than chasing a long list of supported tokens. The security architecture is the headline. The Mk4 stores your seed across two secure elements sourced from different manufacturers, Microchip's ATECC608 and Maxim's DS28C36B. The logic is defense in depth: even if a flaw is found in one vendor's chip, the other still stands between an attacker and your keys. That dual-vendor approach is uncommon and genuinely thoughtful. The honest caveat is that secure-element silicon is proprietary and shipped under NDA, so that specific layer cannot be fully open-sourced the way the rest of the firmware is — a trade-off Coldcard makes deliberately and explains openly. Air-gap is where the Mk4 shines in daily use. You can run the entire signing flow over a microSD card using PSBTs, so the device never touches a USB data connection or the internet. For a threat model that assumes your computer is compromised, that physical isolation is the whole point. Note the nuance: the Mk4 also includes USB and NFC, and purists point out that a device with wireless capability isn't 'air-gapped' in the strictest sense. NFC is optional and can be fully disabled, and you can simply never use USB — but the isolation is something you choose and maintain, not something the hardware forces. The feature depth is where power users fall in love and beginners bounce off. BIP85 for deriving child seeds, duress PINs and a 'brick-me' PIN, Seed XOR for splitting backups, robust multisig, and granular PSBT handling are all here. Used correctly, these are serious tools for serious threat models. Used carelessly, they are also ways to lose access to your own funds. The documentation is thorough but written for someone who already speaks the language, which is exactly why we keep flagging the learning curve. Price and positioning round out the picture. At roughly $160 it costs about double a typical mainstream wallet, and it does one thing — Bitcoin — where others juggle hundreds of assets. Neither is a flaw so much as a statement of intent: you are paying a premium for depth, isolation and a long, battle-tested lineage, not for breadth or hand-holding. Our verdict lands at 4.4 because the Mk4 is close to the best in class at what it targets, and the points it loses are almost entirely about accessibility. If you are experienced, want air-gapped signing, and value advanced backup and duress features, few devices match it. If you want to hand a relative a wallet they can use without a manual, look elsewhere — and that mismatch is a fit problem, not a quality one. **Bottom line:** The most feature-rich, security-serious Bitcoin-only air-gapped signer available — provided you're willing to climb the learning curve to use it safely. ## In the shop [Coldcard Mk4](https://www.nuri.com/shop/hardware-wallets/coldcard-mk4) — $170 approx (sale) ## Sources (11) 1. [COLDCARD Mk4 — Secure Bitcoin Hardware Wallet](https://coldcard.com/mk4) — Coinkite / Coldcard 2. [COLDCARD Mk4 vs. Mk3 — Documentation](https://coldcard.com/docs/coldcard-mk4/) — Coldcard Docs 3. [COLDCARD — Most Trusted Bitcoin Hardware Wallet](https://coldcard.com/) — Coinkite / Coldcard 4. [Coldcard Mk4 Review 2026](https://coinbureau.com/review/coldcard-wallet-review) — Coin Bureau 5. [Coldcard Mk4 Review: 3 Things to Know](https://bitbo.io/tools/coldcard-mk4-review/) — Bitbo 6. [Coldcard Mk4 Review: Air-Gapped Bitcoin Hardware Wallet](https://coinspot.io/en/reviews/coldcard-mk4/) — Coinspot 7. [COLDCARD Mk4 Review: Is It the Best Bitcoin Cold Wallet?](https://www.bitdegree.org/crypto/coldcard-mk4-review) — BitDegree 8. [COLDCARD Mk4 Review: Pros, Cons and How It Compares](https://www.athena-alpha.com/coldcard-mk4/) — Athena Alpha 9. [Coldcard Mk4 Wallet Review](https://thebitcoinhole.com/hardware-wallets/coldcard-mk4) — The Bitcoin Hole 10. [Coldcard Mk4 Review 2026 (9/10)](https://www.bitcoin.diy/reviews/coldcard-mk4) — Bitcoin.diy 11. [Coldcard Mk4 Review: Expert Analysis & Buying Guide](https://www.bitcoinsafe.com/en/reviews/coldcard-mk4) — BitcoinSafe --- --- title: "Blockstream Jade Plus: Fully Open, With a Security Model to Understand" lang: "en" type: "review" product: "blockstream-jade-plus" rating: 4 --- # Blockstream Jade Plus: Fully Open, With a Security Model to Understand _A cheap, fully open-source signer with an excellent QR camera — built on a general-purpose ESP32 and a blind-oracle design you should understand before you trust it._ **Rating: 4.0 / 5** ## Verdict The Jade Plus is one of the best-value fully open-source hardware wallets: great QR scanning, multiple connectivity options, and firmware and hardware you can fully inspect. The trade-off is that it uses a general-purpose ESP32 MCU instead of a dedicated secure element, leaning on a 'blind oracle' for physical-attack resistance — a clever model, but one with real caveats and a documented history of ESP32-class attacks. ## What's good - Fully open-source hardware and firmware — you can even build a compatible device from off-the-shelf parts - Excellent built-in camera for fast, air-gap-friendly QR signing - Flexible connectivity: USB, Bluetooth, camera QR, and microSD - Inexpensive — the Plus is around $149 and the base Jade Core is even cheaper - Blind-oracle model can be self-hosted (e.g. on Umbrel) or run statelessly, so you're not forced to trust Blockstream's server - Larger, sharper screen and better build than the original Jade ## What's not - No dedicated secure element — it runs on a general-purpose ESP32-S3, a chip class with a documented fault-injection/glitching history - Physical-attack resistance depends on the blind oracle; run it fully stateless and you give up some of that protection - The blind oracle introduces an availability and privacy consideration you must reason about (self-hosting mitigates it) - Security researchers (esp32.fail / Ledger Donjon) have published evil-maid firmware-extraction and glitch findings on Jade-class hardware - At least one firmware-level bug (a CBOR 'register_descriptor' issue) was disclosed and patched — keep firmware updated - Bluetooth is convenient but adds attack surface some users prefer to avoid **Buy it if:** Value-focused and open-source-first users who will take the time to understand the blind-oracle model and keep firmware current. **Skip it if:** Buyers who specifically want a dedicated secure element and the simplest possible 'set it and forget it' physical-security story. ## Full review The Jade Plus makes a strong opening argument: it is fully open source, top to bottom. Blockstream publishes the hardware and firmware, and famously you can assemble a compatible Jade from off-the-shelf parts. For people who believe verifiability is the foundation of trust, that openness is the headline feature, and it is not marketing fluff — it is a genuine, auditable commitment that most competitors only partially match. In daily use it is pleasant and capable. The built-in camera is one of the better QR scanners on the market, which makes air-gapped signing fast rather than fiddly. You also get USB, Bluetooth and microSD, so it slots into almost any wallet workflow. The Plus adds a bigger, nicer screen and a more premium feel than the original. At roughly $149 — with the base Jade Core cheaper still — the value proposition is excellent on paper. The part that demands honesty is the security architecture. Unlike Coldcard or Passport, the Jade does not use a dedicated secure element. It runs on a general-purpose ESP32-S3 microcontroller. To compensate, Blockstream designed the 'blind oracle': your wallet encryption is split between your PIN, the device, and a remote oracle server that never learns your PIN, keys or addresses. It functions as a virtual secure element, and critically you can run your own oracle (for example on Umbrel) or operate the device in a stateless mode with no oracle at all. That design is genuinely clever, and it is the reason Jade can stay fully open — secure-element silicon is proprietary, so avoiding it is what buys the openness. But the trade-offs are real and worth stating plainly. Lean on the blind oracle and you introduce an availability and privacy consideration (mitigated, though not eliminated, by self-hosting). Run fully stateless and you shed some of the physical-attack resistance the oracle provides. There is no free lunch; there is a choice you should make deliberately. The ESP32 lineage also carries baggage. General-purpose MCUs of this class have a documented history of voltage-glitching and fault-injection attacks going back to Black Hat research, and security researchers have published evil-maid firmware-extraction work specifically against Jade-class hardware. Separately, a firmware-level vulnerability in the CBOR 'register_descriptor' path was responsibly disclosed and patched. None of this means Jade is broken — Blockstream has responded with updates — but it does mean physical security here is a moving target that depends on you keeping firmware current. We land at 4.0. The Jade Plus is a legitimately great open-source wallet at a great price, and for a threat model centered on remote attackers and everyday use it is more than sufficient. It loses points only against the strictest physical-security bar, where a dedicated secure element and a simpler trust story win. Buy it if openness and value are your priorities and you are willing to understand the oracle model; look elsewhere if you want a secure element and zero homework. **Bottom line:** A superb-value, fully open-source signer whose novel blind-oracle security model is a strength and a homework assignment in equal measure. ## In the shop [Blockstream Jade Plus](https://www.nuri.com/shop/hardware-wallets/blockstream-jade-plus) — $149 ## Sources (12) 1. [Blockstream Jade Plus — Official Product Page](https://blockstream.com/jade/jade-plus/) — Blockstream 2. [Blockstream Jade Plus — Store](https://store.blockstream.com/products/jade-plus) — Blockstream Store 3. [Introducing the All-New Blockstream Jade Plus](https://blog.blockstream.com/introducing-the-all-new-blockstream-jade-plus-simple-enough-for-beginners-advanced-enough-for-cypherpunks/) — Blockstream Blog 4. [Jade Security Model FAQs](https://help.blockstream.com/hc/en-us/articles/15884462476953-Jade-security-model-FAQs) — Blockstream Help Center 5. [Why Doesn't Jade Have a Secure Element?](https://help.blockstream.com/hc/en-us/articles/13745404122265-Why-doesn-t-Jade-have-a-secure-element) — Blockstream Help Center 6. [Blind Oracle — Glossary](https://glossary.blockstream.com/blind-oracle/) — Blockstream 7. [Set Up a Personal Blind Oracle with Umbrel](https://help.blockstream.com/hc/en-us/articles/18904765931161-Set-up-a-personal-blind-oracle-with-Umbrel) — Blockstream Help Center 8. [jade.fail / esp32.fail — Vulnerabilities & Mishaps of Blockstream Jade](https://esp32.fail/) — esp32.fail 9. [Firmware Extraction: Evil-Maid Attacks on Blockstream Jade](https://www.ledger.com/blog/firmware-extraction-evil-maid-attacks-on-blockstream-jade-hardware-wallet) — Ledger Donjon 10. [Jade Security Disclosure](https://blog.blockstream.com/jade-security-disclosure/) — Blockstream Blog 11. [Less Complexity, Same Security: Blockstream Introduces Jade Core](https://blockstream.com/press-releases/2026-04-28-blockstream-introduces-jade-core/) — Blockstream Press 12. [Blockstream Jade Review (2025): Open-Source Security](https://www.walletpilot.com/hardware-wallets/blockstream-jade/review) — WalletPilot --- --- title: "Foundation Passport Core: The Air-Gap Purist's Beautiful Signer" lang: "en" type: "review" product: "foundation-passport-core" rating: 4.4 --- # Foundation Passport Core: The Air-Gap Purist's Beautiful Signer _No USB data, no radios, a phone-like keypad and fully open firmware — a genuinely air-gapped Bitcoin-only wallet that treats design as a feature._ **Rating: 4.4 / 5** ## Verdict The Passport Core is one of the few wallets that is air-gapped by construction, not by user discipline: it has no USB data port and no wireless of any kind, communicating only via QR codes and microSD. Add fully open firmware, a US-assembled build and a genuinely pleasant keypad interface, and you get a polished, purist signer. You pay a premium for it, and it's Bitcoin-only. ## What's good - Truly air-gapped by design — no USB data, no Bluetooth, no WiFi; QR codes and microSD only - Fully open source: hardware schematics, MicroPython firmware, and the Envoy companion app are all published - Familiar phone-style numeric keypad and color screen make it one of the most intuitive air-gapped wallets to operate - Uses a Microchip ATECC608A secure element for key storage plus an avalanche-noise true RNG for provable entropy - Assembled in the USA under Foundation's supervision, with third-party-reviewed firmware - Bitcoin-only focus keeps the codebase and attack surface lean; works with Envoy, Sparrow and Electrum ## What's not - Premium price — the Core is $199, more than most mainstream wallets - Single-vendor secure element, versus Coldcard's dual secure elements from two manufacturers - MicroPython firmware favors auditability over raw performance - Bitcoin-only — no use if you also hold other assets - Physically larger than keychain-style devices, and USB-C is power-only (no data), so all transfers are QR or microSD - QR/microSD-only workflow is more deliberate (some would say slower) than just plugging in over USB **Buy it if:** Bitcoin-only holders who want a truly air-gapped, fully open-source signer with a polished, approachable interface. **Skip it if:** Multi-asset users, bargain hunters, or anyone who wants the convenience of direct USB signing. ## Full review Passport's defining trait is that its air-gap is not a mode you have to remember to use — it is baked into the hardware. There is no USB data connection and no wireless of any kind; the USB-C port is power-only. Everything moves in and out via QR codes or a microSD card. That means you cannot accidentally undermine the isolation, which is a meaningfully stronger guarantee than a device that merely offers an air-gapped option alongside USB and NFC. For a purist threat model, that design decision is the whole ballgame. The openness is comprehensive. Foundation publishes the hardware schematics, the firmware (open-source MicroPython), and the Envoy companion app, making Passport one of the most completely open-source wallets you can buy. It pairs an STMicroelectronics STM32H753 microcontroller with a Microchip ATECC608A secure element used purely for secure key storage, and adds an avalanche-noise circuit as a true random number generator — an open, provable entropy source rather than a black box. The firmware has also been third-party reviewed, and the hardware is assembled in the USA under the team's supervision. In the hand, Passport is the anti-cryptic wallet. Where many secure devices feel like puzzle boxes, Passport's numeric keypad and color screen feel like using a familiar phone. Reviewers who have lived with it for months consistently describe the interface as intuitive even for relative newcomers, which is rare in the air-gapped category. Design here is not vanity; a signer you understand is a signer you use correctly, and that reduces the human errors that cause most real-world losses. The honest trade-offs are mostly about positioning. Passport uses a single secure element, whereas Coldcard hedges with two from different vendors — a defensible difference in defense-in-depth philosophy that stricter buyers will weigh. The MicroPython firmware optimizes for readability and auditability over speed, so it is not the snappiest device. And the QR/microSD-only workflow, while a security virtue, is more deliberate than plugging in a cable; you trade a little convenience for isolation on every transaction. Then there is price and scope. At $199 for the Core (with a $349 Prime above it), Passport sits at the premium end, and it is Bitcoin-only. For someone who holds a range of assets or wants the cheapest workable wallet, that is a poor fit. For someone who has decided Bitcoin cold storage is worth doing properly and wants every layer verifiable, the premium buys real things: a truly air-gapped design, full openness, domestic assembly and a genuinely nice interface. We rate it 4.4. Passport Core is close to the top of its class for air-gap purists who value design and openness, and the marks it loses are about cost, the single secure element, and the deliberate-by-nature workflow rather than any real weakness. If you want a beautiful, fully open, no-radios Bitcoin signer and the price does not scare you, it is one of the easiest recommendations in the category. **Bottom line:** A polished, fully open, genuinely air-gapped Bitcoin-only signer that justifies its premium for anyone who wants isolation and design without compromise. ## In the shop [Foundation Passport Core](https://www.nuri.com/shop/hardware-wallets/foundation-passport-core) — $199 ## Sources (11) 1. [Passport Core — Official Product Page](https://foundation.xyz/passport-core/) — Foundation 2. [Passport Is Now Passport Core](https://foundation.xyz/2025/03/passport-is-now-passport-core/) — Foundation Blog 3. [Foundation — Company Site](https://foundation.xyz/) — Foundation 4. [passport2 — v2.x firmware for Passport](https://github.com/Foundation-Devices/passport2) — GitHub (Foundation-Devices) 5. [Passport Firmware — SECURITY.md](https://github.com/Foundation-Devices/passport-firmware/blob/main/SECURITY/SECURITY.md) — GitHub (Foundation-Devices) 6. [Foundation Passport Review 2026: A True FOSS Hardware Wallet](https://blockdyor.com/foundation-passport-review/) — Blockdyor 7. [Foundation Passport Review: Pros, Cons and How It Compares](https://www.athena-alpha.com/foundation-passport-review/) — Athena Alpha 8. [Foundation Passport Review After Six Months of Daily Use](https://www.bitcoinproducts.com/blog/foundation-passport-review-six-months-daily-use) — Bitcoin Products 9. [Foundation Passport Review 2026 (8.5/10)](https://www.bitcoin.diy/reviews/foundation-passport) — Bitcoin.diy 10. [Foundation Passport Review 2026: Open-Source, US-Made Cold Storage](https://stateofsurveillance.org/resources/foundation-passport/) — State of Surveillance 11. [Foundation Passport Core Hardware Wallet — product](https://www.thecryptomerchant.com/products/foundation-passport-hardware-wallet) — The Crypto Merchant --- --- title: "Ledger Nano X: Slick, Popular, and Still Asking for Trust" lang: "en" type: "review" product: "ledger-nano-x" rating: 3.5 --- # Ledger Nano X: Slick, Popular, and Still Asking for Trust _A polished, Bluetooth-enabled wallet from a company whose security promises have been tested more than once._ **Rating: 3.5 / 5** ## Verdict The Nano X is a well-built, beginner-friendly multi-coin wallet with a genuine certified Secure Element, but its closed-source SE firmware, the 2020 customer-data breach, and the 2023 'Ledger Recover' backlash mean you are trusting Ledger's word on the parts you cannot audit. It works, and millions use it, but Bitcoin maximalists who value verifiability have better options. ## What's good - Certified ST33 Secure Element with a long track record against physical attacks - Very approachable Ledger Live app and setup, good for first-time users - Bluetooth 5.2 and USB-C allow mobile use without cables - Broad asset support (500+ coins and thousands of tokens) if you hold more than Bitcoin - Widely available, strong resale/support ecosystem ## What's not - The Secure Element's low-level firmware is closed source and under an STMicroelectronics NDA — Ledger itself calls it the ~5% you cannot inspect - 2020 e-commerce breach exposed ~1 million emails and 272,853 customers' names, physical addresses and phone numbers — a physical-safety concern for holders - The 2023 'Ledger Recover' service showed a firmware update can extract an encrypted seed backup off the device, contradicting years of 'keys never leave' messaging - Bluetooth enlarges the attack surface versus a USB-only device, even if Ledger rates the risk low - You are paying ~$149 (roughly double the USB-only Nano S Plus) largely for wireless convenience **Buy it if:** Beginners and multi-coin holders who want a polished app experience and accept trusting Ledger on the closed parts. **Skip it if:** Verification-focused Bitcoiners who want fully auditable firmware and were unsettled by the Recover episode or the address leak. ## Full review The Ledger Nano X is the wireless flagship of the world's best-selling hardware-wallet line. It pairs an ST33 Secure Element with Bluetooth 5.2 and USB-C, driving a small 128x64 monochrome OLED, and it manages 500+ assets through the Ledger Live app. At around $149 it costs roughly double the USB-only Nano S Plus, and most of that premium buys you Bluetooth and a larger transaction memory rather than any extra security. As a piece of consumer hardware it is genuinely good: fast, sturdy, and about as friendly as cold storage gets. The security model rests on that Secure Element, a bank-card-grade chip designed to resist physical extraction. The catch, which Ledger states openly, is that the SE's low-level firmware is closed source and locked behind an STMicroelectronics NDA. Ledger describes its stack as '95% open source'; the remaining 5% is exactly the part that governs the chip holding your keys. For many users that is an acceptable trade for certified hardware. For anyone who believes 'don't trust, verify,' it is the whole ballgame — you are trusting a company, not inspecting a design. That trust has been tested. In 2020 a breach of Ledger's e-commerce and marketing database exposed roughly one million customer emails and, in the public dump that followed, 272,853 buyers' names, home addresses and phone numbers. No funds, passwords or seed data were touched — the private keys were never at risk — but for a product bought specifically by people holding wealth, leaking a list of who owns hardware wallets and where they live is a serious physical-security failure, and it drove a wave of phishing and extortion attempts. The second dent came in May 2023 with 'Ledger Recover,' an optional paid service that splits an encrypted copy of your seed across three custodians so it can be restored with ID verification. The uproar was not really about the feature; it was Ledger's own explanation that firmware could facilitate key extraction. That single admission rewrote how many users understood the device, and Ledger postponed the launch, promising to open-source OS components first. It was a self-inflicted credibility wound more than a technical break. On Bluetooth, Ledger's position is that only public data crosses the radio, keys never leave the SE, and pairing uses numeric comparison to resist man-in-the-middle attacks. Independent reviewers generally rate the practical BLE risk as low, but note the obvious: a radio you can turn on is attack surface a USB-only wallet does not have. If you want the Ledger experience without it, the Nano S Plus is the cheaper, wire-only sibling. The verdict is nuanced. The Nano X is not insecure, and the millions of people using it without incident are not fools. But it is a device that repeatedly asks you to trust the maker on the parts you cannot check, and whose maker has twice given critics ammunition. If you value convenience, multi-coin support and a smooth app, it is a reasonable buy. If your priority is auditability and minimizing who you must trust, the open-source Bitcoin-only wallets in this roundup answer that need more directly for less money. **Bottom line:** A convenient, capable wallet with real certified hardware, undermined for verification-minded Bitcoiners by closed firmware and a rocky trust record. ## In the shop [Ledger Nano X](https://www.nuri.com/shop/hardware-wallets/ledger-nano-x) — $149 ## Sources (13) 1. [Buy Ledger Nano X Hardware Wallet](https://shop.ledger.com/products/ledger-nano-x) — Ledger 2. [Ledger Nano X & Bluetooth – Security Model of a Wireless Hardware Wallet](https://www.ledger.com/ledger-nano-x-bluetooth-security-model-of-a-wireless-hardware-wallet) — Ledger 3. [Is Ledger Open Source?](https://www.ledger.com/academy/topics/ledgersolutions/is-ledger-open-source) — Ledger Academy 4. [Ledger is 95% Open Source, why not 100%?](https://www.ledger.com/blog-ledger-is-95-opensource-why-not-100) — Ledger 5. [Addressing the July 2020 e-commerce and marketing data breach](https://www.ledger.com/addressing-the-july-2020-e-commerce-and-marketing-data-breach) — Ledger 6. [Message by Ledger's CEO — Update on the July data breach](https://www.ledger.com/message-ledgers-ceo-data-leak) — Ledger 7. [Physical addresses of 270K Ledger owners leaked on hacker forum](https://www.bleepingcomputer.com/news/security/physical-addresses-of-270k-ledger-owners-leaked-on-hacker-forum/) — BleepingComputer 8. [Crypto Firm Ledger's Breach Hits One Million Customers](https://www.infosecurity-magazine.com/news/crypto-firm-ledgers-breach-one/) — Infosecurity Magazine 9. [Ledger Data Breach](https://haveibeenpwned.com/Breach/Ledger) — Have I Been Pwned 10. [Ledger Bats Back Criticism of New Wallet Recovery Service](https://www.coindesk.com/tech/2023/05/16/ledger-bats-back-criticism-of-new-wallet-recovery-service) — CoinDesk 11. [Ledger defends crypto wallet recovery tool against hostile reaction](https://www.theblock.co/post/230992/ledger-defends-crypto-wallet-recovery-tool) — The Block 12. [Crypto Wallet Provider Ledger Delays Key-Recovery Service After Uproar](https://www.coindesk.com/business/2023/05/23/crypto-wallet-provider-ledger-postpones-release-of-key-recovery-service-after-public-criticism) — CoinDesk 13. [Ledger Nano X Review (2026 Updated): Is It Worth $149?](https://coinbureau.com/review/ledger-nano-x) — Coin Bureau --- --- title: "Trezor Safe 5: Open Source Grows Up and Adds a Secure Chip" lang: "en" type: "review" product: "trezor-safe-5" rating: 4.2 --- # Trezor Safe 5: Open Source Grows Up and Adds a Secure Chip _The first genuinely touch-friendly Trezor finally pairs open firmware with a real secure element — but it is no longer the top of the range._ **Rating: 4.2 / 5** ## Verdict The Safe 5 fixes the historic Trezor weakness — no secure element — by adding an EAL6+ Optiga chip while keeping the firmware fully open source. It is a polished, trustworthy device, but the newer Safe 7 now sits above it, the secure element's own firmware is still closed Infineon code, and mobile support remains limited. A strong pick that is one model short of being the flagship. ## What's good - EAL6+ Infineon Optiga Trust M secure element, added specifically to stop physical seed-extraction attacks that plagued older Trezors - Firmware is fully open source (GPL-3.0) and independently reviewable - Bright 1.54" color touchscreen with haptic feedback — the nicest Trezor UX yet - Supports Shamir Backup and thousands of assets via the mature Trezor Suite - Competitive price (official $129) for a modern secure-element device ## What's not - The Optiga secure element runs Infineon's closed, un-updateable firmware — Trezor guarantees public documentation and review, not open SE code - Older Trezor One and Model T had no secure element and were physically seed-extractable (Ledger Donjon 2019, Kraken 2020) - The newer Safe 7, with an open/auditable Tropic Square secure element, now sits above the Safe 5 in the lineup - iOS support is limited (view/receive/buy only; no send or setup on iPhone) - Small screen and Suite's learning curve; some coins (e.g. Solana SPL tokens) aren't fully managed in Suite **Buy it if:** Users who want an open-source wallet with a modern secure element and a genuinely pleasant touchscreen, at a mid-range price. **Skip it if:** Buyers who want the most auditable secure element available today (look at the Safe 7) or full-featured iPhone use. ## Full review The Trezor Safe 5 represents Trezor growing out of a long-standing criticism. For years Trezor's calling card was radical openness — fully open-source firmware you could inspect line by line — paired with an uncomfortable weakness: no secure element. The Safe 5 keeps the openness and adds an Infineon Optiga Trust M, a chip certified to Common Criteria EAL6+, chosen specifically because Infineon allows public review of it without an NDA. Wrap that in a bright 1.54-inch color touchscreen with haptic feedback and you get the most refined Trezor to date, at an official price of $129. To understand why the secure element matters, look at the attacks it answers. In 2019 Ledger's Donjon lab demonstrated an unfixable seed-extraction attack on the Trezor One and Model T, pulling the seed in minutes with about $100 of gear, because the secret lived on a general-purpose microcontroller. In early 2020 Kraken Security Labs showed a voltage-glitching variant needing roughly 15 minutes and $75 of hardware. Both required physical possession, and a strong passphrase mitigated them, but they were real and unpatchable by design. The Safe line exists to close that hole. It largely does. The secret material is now guarded by the Optiga secure element rather than a bare MCU, which defeats those cheap glitching attacks. The honest caveat is that the secure element itself runs closed Infineon firmware — Trezor gives you open documentation and the right to review, not open silicon. And the fix is not a magic shield: in March 2025 Ledger Donjon showed you can still glitch the microcontroller on the related Safe 3, which underlines the point that it is the secure element, not the MCU, doing the protecting. This is a more layered, more honest security story than before, not an absolute one. The everyday experience is the best Trezor has offered. The color touchscreen makes PIN and passphrase entry and address confirmation far nicer than the old two-button devices, though independent reviewers note the touch PIN can take a couple of tries and a stylus helps. Trezor Suite is mature and privacy-respecting, supports Shamir Backup for splitting your seed into multiple shares, and handles thousands of assets. The rough edges are on mobile — iOS is limited to viewing, receiving and buying, with no send or initial setup — and a few assets like Solana SPL tokens are not fully managed in Suite. The biggest strategic caveat is internal: the Safe 5 is no longer the flagship. In October 2025 Trezor launched the Safe 7, built around Tropic Square's TROPIC01, marketed as the first transparent, auditable secure element — the thing open-source purists always wanted. That does not make the Safe 5 bad; it makes it the value model beneath a more ideologically pure sibling. (Even the Safe 7 is not invincible: in mid-2026 a laser fault-injection flaw was disclosed in TROPIC01, though keys aren't stored on that chip so funds were unaffected.) Overall the Safe 5 earns a strong recommendation with clear eyes. It is open where it counts, hardened where it used to be soft, and pleasant to use, at a fair price. If you specifically want the most auditable hardware available, budget for the Safe 7; if you want an excellent open-source wallet and don't need to own the very top of the range, the Safe 5 is one of the easiest devices in this roundup to recommend. **Bottom line:** The Trezor that finally answers its critics on secure elements while staying open source — just no longer the top model in its own family. ## In the shop [Trezor Safe 5](https://www.nuri.com/shop/hardware-wallets/trezor-safe-5) — $169 ## Sources (13) 1. [Trezor Safe 5 | Secure Crypto Hardware Wallet](https://trezor.io/trezor-safe-5) — Trezor 2. [Secure Elements in Trezor Safe devices](https://trezor.io/learn/security-privacy/how-trezor-keeps-you-safe/secure-elements-in-trezor-safe-devices) — Trezor Knowledge Base 3. [trezor/trezor-firmware (Firmware Monorepo)](https://github.com/trezor/trezor-firmware) — GitHub / Trezor 4. [Unfixable Seed Extraction on Trezor – A practical and reliable attack](https://www.ledger.com/blog/unfixable-key-extraction-attack-on-trezor) — Ledger Donjon 5. [Kraken Identifies Critical Flaw in Trezor Hardware Wallets](https://blog.kraken.com/product/security/kraken-identifies-critical-flaw-in-trezor-hardware-wallets) — Kraken Blog 6. [Trezor discloses potential vulnerability in older Safe 3 wallets](https://www.theblock.co/post/346018/trezor-discloses-vulnerability-safe-3-crypto-wallet-rival-ledger) — The Block 7. [Trezor Launches Trezor Safe 7: First Hardware Wallet With Transparent Secure Element](https://satoshilabs.com/news/trezor-launches-trezor-safe-7-first-hardware-wallet-with-transparent-secure-element) — SatoshiLabs 8. [Trezor Safe 7 | Hardware Wallet with TROPIC01 Secure Element](https://trezor.io/trezor-safe-7) — Trezor 9. [Open Hardware Security Goes Mainstream with TROPIC01 in Trezor Safe 7](https://www.tropicsquare.com/news-and-events/open-hardware-security-goes-mainstream-with-tropic01-in-trezor-safe-7) — Tropic Square 10. [Trezor response: TROPIC01 chip disclosure (no impact to your funds)](https://trezor.io/blog/news/Trezor-response-TROPIC01-chip-disclosure-no-impact-to-your-funds) — Trezor Team 11. [Trezor Safe 5 Wallet Review 2026: Price, Features, and Where It Sits](https://cryptoslate.com/crypto-wallets/trezor-safe-5-review/) — CryptoSlate 12. [A review of the Trezor Safe 5 hardware cryptocurrency wallet](https://bdtechtalks.com/2025/11/16/trezor-safe-5-review/) — TechTalks 13. [Your Complete Guide to Trezor Safe 5 (Trezor Safe 5 Review)](https://coinbureau.com/review/trezor-safe-5-review) — Coin Bureau --- --- title: "Coldcard Q: A Bitcoin Fortress That Fights You a Little" lang: "en" type: "review" product: "coldcard-q" rating: 4.3 --- # Coldcard Q: A Bitcoin Fortress That Fights You a Little _Coinkite's keyboard-equipped, air-gappable, Bitcoin-only signer is one of the most serious cold-storage tools made — and one of the least forgiving._ **Rating: 4.3 / 5** ## Verdict The Coldcard Q is a purpose-built Bitcoin cold-storage device with a full keyboard, QR scanner, dual secure elements and a deep bag of paranoid features. It is arguably the most capable air-gapped signer for self-sovereign Bitcoiners, but its learning curve is steep, it has no companion app of its own, its license is not true open source, and at ~$249 it is a premium buy. This is a power tool, not a starter wallet. ## What's good - Bitcoin-only by design, deliberately shrinking the attack surface (no altcoin code paths) - Genuine air-gap options: QR (animated BBQr), dual microSD slots, or NFC — you never need to plug into a computer - Two secure elements from different vendors (Microchip ATECC608 + Maxim DS28C36B), so one compromised chip isn't enough - Deep defensive features: anti-phishing words, duress/decoy wallet PIN, brick-self PIN, login countdown, auto-brick after failed attempts - Full QWERTY keyboard and larger screen make passphrases and PSBT workflows far more usable than earlier Coldcards - Reproducible firmware builds you can verify yourself ## What's not - Steep learning curve — reviewers consistently call it a power-user device, not a beginner's wallet - No first-party app; you must pair it with Sparrow, Electrum or Bitcoin Core to actually manage funds - Firmware is source-available but carries a Commons Clause restricting resale, so it is not OSI-approved open source - Premium price (~$249) versus mainstream wallets, and higher than earlier Coldcards - Bitcoin-only means it is useless if you hold anything other than BTC - Some workflows rely on Coinkite's own QR format, adding a mild lock-in wrinkle **Buy it if:** Experienced Bitcoiners who want maximal, air-gapped, verifiable cold storage and will invest time to learn it. **Skip it if:** Beginners, multi-coin holders, or anyone who wants to plug in and go without reading documentation. ## Full review The Coldcard Q is Coinkite's flagship Bitcoin signer, and it makes no attempt to be for everyone. It has a full 50-key QWERTY keyboard, a larger 320x240 LCD, a built-in QR scanner, dual microSD slots, NFC, and runs on AAA batteries so it need never touch a computer. Everything about it is oriented around one idea: keep the private keys air-gapped and let signed transactions travel out as PSBTs over QR, SD card or NFC. It is Bitcoin-only on purpose — Coinkite argues that supporting only Bitcoin shrinks the attack surface, and there is real merit to not carrying thousands of lines of altcoin parsing code near your keys. The security model is unusually layered. The Q uses two secure elements from two different manufacturers, so the secret is split such that compromising a single chip does not hand over your seed. On top of that sits a genuinely paranoid feature set: anti-phishing words that prove the device isn't swapped, a duress PIN that opens a decoy wallet, a brick-self PIN that destroys the device on demand, a login countdown timer, and automatic bricking after repeated wrong PINs. For someone modeling coercion or a '$5 wrench' scenario, these are not gimmicks — they are the reason people choose Coldcard. Coinkite's track record here is relevant and, on balance, reassuring. When Ledger's Donjon lab disclosed a laser fault-injection attack against the older Mk2's ATECC508A chip around 2020, Coinkite responded publicly and had already moved newer models to the ATECC608A, which was not affected — and the attack required over $200,000 of equipment and physical possession. That is roughly how responsible disclosure is supposed to go. It is a point in Coinkite's favor that the weakness was in an older model, acknowledged openly, and already superseded. The honesty caveat is the license. Coldcard firmware is source-available and reproducibly built, which is genuinely valuable — you can verify the code running on your device. But it ships under a Commons Clause that revokes the right to sell the software, which means it is not open source in the OSI sense. Critics in the Bitcoin community have pushed back on Coinkite marketing that blurs 'source-available' into 'open source.' It is more transparent than a closed device like Ledger, and less free than fully open firmware like Trezor's or BitBox's. Know which one you're buying. Usability is where the Q asks the most of you. Independent reviews are enthusiastic about its security (scores like 9/10 are common) but uniform in warning that the learning curve is steep. There is no Coldcard app; the device is a signer that you pair with third-party software like Sparrow, Electrum or Bitcoin Core. At roughly $249 it is also priced well above mainstream wallets and above earlier Coldcards. The keyboard and bigger screen make it far more pleasant than the old Mk-series for entering long passphrases and reviewing transactions, but 'more pleasant' still means 'aimed at people who enjoy this.' The verdict is that the Coldcard Q is one of the best cold-storage tools in Bitcoin — for the right owner. If you are a serious, technically comfortable Bitcoiner who wants a truly air-gapped, verifiable, feature-dense signer and you will take the time to learn PSBT workflows and pair it with Sparrow, few devices serve you better. If you want something you can hand to a relative, or you hold coins other than Bitcoin, or you don't want to read the manual, this is the wrong purchase and you should feel no shame skipping it. **Bottom line:** The most serious Bitcoin-only air-gapped signer here, brilliant for power users and genuinely wrong for beginners. ## In the shop [Coldcard Q](https://www.nuri.com/shop/hardware-wallets/coldcard-q) — $249 ## Sources (13) 1. [COLDCARD Q - Premium Bitcoin Hardware Wallet](https://coldcard.com/q) — Coinkite 2. [COLDCARD Q Overview (Documentation)](https://coldcard.com/docs/coldcard-q/) — Coinkite 3. [Bitcoin Air-Gap Signing Methods](https://coldcard.com/learn/advanced-concepts/air-gap-signing-methods) — Coinkite / COLDCARD 4. [PINs - COLDCARD Documentation](https://coldcard.com/docs/pins/) — Coinkite 5. [COLDCARD - Most Trusted Bitcoin Hardware Wallet](https://coldcard.com/) — Coinkite 6. [COLDCARD Q (store listing / price)](https://store.coinkite.com/store/coldcard) — Coinkite Store 7. [Laser Fault Injection (response to Ledger Donjon disclosure)](https://blog.coinkite.com/laser-fault-injection/) — Coinkite Blog 8. [Firmware and simulator for Coldcard Hardware Wallet](https://github.com/Coldcard/firmware) — GitHub / Coinkite 9. [Coinkite Launches Its New Flagship Bitcoin Hardware Wallet Coldcard Q1](https://bitcoinmagazine.com/business/coinkite-new-bitcoin-wallet-coldcard-q1) — Bitcoin Magazine 10. [Improving the Ecosystem: Disclosing ColdCard Mk2 PIN Vulnerability](https://www.ledger.com/improving-the-ecosystem-disclosing-coldcards-pin-vulnerability) — Ledger 11. [COLDCARD Q Review 2026: Is It The Best Ever?](https://blockdyor.com/coldcard-q-review/) — Blockdyor 12. [Coldcard Q Review 2026: Hands-On Test & Rating](https://bitcoins.tools/reviews/coldcard-q/) — Bitcoins.tools 13. [Understanding The COLDCARD Mk4 Security Model and Secure Element Use](https://www.nobsbitcoin.com/coldcard-security-model/) — No Bullshit Bitcoin --- --- title: "BitBox02 Bitcoin-only: Swiss, Open, and Refreshingly Boring" lang: "en" type: "review" product: "bitbox02-bitcoin-only" rating: 4.4 --- # BitBox02 Bitcoin-only: Swiss, Open, and Refreshingly Boring _A small, audited, fully open-source Bitcoin wallet that does the fundamentals right and asks little of you — if you can live with the tiny screen._ **Rating: 4.4 / 5** ## Verdict The Bitcoin-only BitBox02 is one of the easiest wallets here to trust: Swiss-made, fully open-source and reproducibly built, dual-chip, and independently audited, with firmware locked to Bitcoin at the factory to shrink the attack surface. Its weaknesses are ergonomic — a tiny OLED, touch sliders with a learning curve, and a historically app-centric ecosystem — rather than security ones. A quietly excellent choice for focused Bitcoiners. ## What's good - Fully open-source firmware (Apache-2.0), reproducibly built and independently verified by WalletScrutiny - Dual-chip design pairing a microcontroller with an ATECC608B secure element - Firmware locked to Bitcoin-only at the factory, deliberately reducing attack surface - Independently audited (Census Labs and others) with an active bug bounty - Swiss-made by Shift Crypto with a clear, published threat model - Compact, includes a microSD card for encrypted backups, USB-C native ## What's not - The 128x64 OLED is small and, per reviewers, a fingerprint and scratch magnet - Capacitive touch sliders have a learning curve and can be awkward when the device lies flat on a desk - Historically tied to the BitBoxApp ecosystem, though third-party wallet options have grown - The secure element (ATECC608B) is a vendor chip, so that layer isn't open silicon even though the firmware is - Pricier than the cheapest wallets (around €109 direct, ~$150 via US resellers) **Buy it if:** Bitcoin-focused users who want a fully auditable, no-drama Swiss wallet and don't mind a small screen. **Skip it if:** Anyone holding altcoins, or who wants a large color display and a plug-and-play feel. ## Full review The BitBox02 Bitcoin-only edition is the anti-drama hardware wallet. Made by Shift Crypto in Zurich and released in 2019, it is a compact dual-chip device with a small monochrome OLED, capacitive touch sensors, USB-C, and an included microSD card for encrypted backups. The Bitcoin-only firmware is locked at the factory so the device literally cannot run altcoin code, which is a clean way to shrink the attack surface. Nothing about it is flashy, and that is rather the point: it aims to do the fundamentals correctly and get out of your way. Where it earns real trust is transparency. The firmware is fully open source under Apache-2.0, and — crucially — it is reproducibly built and independently verified by WalletScrutiny, which confirmed the wallet passed all of its verification tests. That means you are not merely told the code is open; a third party has checked that the code you can read is the code running on the device. Shift Crypto also publishes an honest threat model that spells out what the wallet does and does not protect against, and runs a bug bounty. This is the posture you want from something guarding money. The hardware security rests on a dual-chip split: a general-purpose microcontroller works alongside an ATECC608B secure element, so sensitive operations are guarded by dedicated hardware rather than living in plain firmware memory. The device's firmware has been audited by Census Labs and other firms. The honest caveat, common to this whole category, is that the secure element itself is a vendor chip whose internals aren't open silicon — but the surrounding firmware, which is where most real-world bugs live, is fully open and verifiable. No specific published CVE for the BitBox02 turned up in research, which is a reasonable sign for a wallet this scrutinized. The weaknesses are almost entirely about ergonomics. Independent reviewers like Decrypt and The Block are complimentary about the security but blunt about the experience: the small OLED is a fingerprint and scratch magnet, and the capacitive touch sliders take getting used to — they can be genuinely fiddly to tap when the device is resting flat on a table. The microSD backup slot has been called finicky compared to a Coldcard. None of this affects safety; it affects how much you enjoy day-to-day use, and it is worth handling one before deciding. Ecosystem is the other consideration. The BitBox02 was historically centered on the BitBoxApp desktop and mobile software, which is clean and beginner-friendly but meant an app-first experience rather than a bring-your-own-wallet one. Third-party integrations have broadened over time, but if you specifically want to drive everything from Sparrow or Bitcoin Core, verify current support for your setup. Pricing sits in the mid-range — roughly €109 direct from Shift Crypto, closer to $150 through US resellers — cheaper than a Coldcard Q, dearer than the bargain options. The verdict is that the Bitcoin-only BitBox02 is one of the most quietly recommendable devices in this roundup. It is open, audited, reproducible, Swiss-made, and focused, and its downsides are a small screen and touch controls rather than anything that should keep you up at night. If you hold Bitcoin, value verifiability, and can live with a tiny display, it is an easy wallet to trust and a hard one to regret. **Bottom line:** A fully open, independently verified, Swiss Bitcoin-only wallet whose only real flaws are a tiny screen and fiddly touch controls. ## In the shop [BitBox02 Bitcoin-only](https://www.nuri.com/shop/hardware-wallets/bitbox02-bitcoin-only) — $99 ## Sources (12) 1. [BitBox - The Bitcoin-only hardware wallet](https://bitbox.swiss/bitbox02/bitcoin-only/) — Shift Crypto AG 2. [BitBox02 features](https://bitbox.swiss/bitbox02/features/) — Shift Crypto AG 3. [Security on every level (audits & secure element)](https://bitbox.swiss/bitbox02/security-features/) — Shift Crypto AG 4. [BitBox threat model](https://bitbox.swiss/bitbox02/threat-model/) — Shift Crypto AG 5. [About us (company background)](https://bitbox.swiss/about/) — Shift Crypto AG 6. [BitBoxSwiss/bitbox02-firmware](https://github.com/BitBoxSwiss/bitbox02-firmware) — GitHub / Shift Crypto 7. [BitBox02 review: Small, secure, expensive](https://decrypt.co/18792/bitbox02-review-small-secure-expensive) — Decrypt 8. [The Block Review: BitBox02](https://www.theblock.co/post/43675/the-block-review-bitbox02) — The Block 9. [BitBox02 hardware wallet (official shop)](https://shop.bitbox.swiss/en/products/bitbox02-80/) — BitBox Shop 10. [BitBox02 Hardware wallet test: security, price & more (2026)](https://www.hardware-wallets.net/bitbox02-review/) — hardware-wallets.net 11. [WalletScrutiny - BitBox02 hardware wallet](https://walletscrutiny.com/hardware/bitBox2/) — WalletScrutiny 12. [BitBox02 Hardware Wallet (Bitcoin Only Edition)](https://www.thecryptomerchant.com/products/shift-crypto-bitbox02-bitcoin) — The Crypto Merchant --- --- title: "Keystone 3 Pro: Big-Screen Air-Gapping With a Trust Asterisk" lang: "en" type: "review" product: "keystone-3-pro" rating: 3.9 --- # Keystone 3 Pro: Big-Screen Air-Gapping With a Trust Asterisk _A slick, fully air-gapped QR wallet with three secure chips and a big touchscreen — whose openness and origins deserve a closer look._ **Rating: 3.9 / 5** ## Verdict The Keystone 3 Pro delivers a genuinely air-gapped QR workflow, three secure elements, a fingerprint sensor and a large 4-inch touchscreen at a competitive $149. It is mostly open source and has been audited, but its builds are not fully reproducible, it leans on an Android-based OS, and its China-founded origins raise supply-chain questions some buyers will care about. Great hardware, with trust caveats you should weigh honestly. ## What's good - Fully air-gapped: signing happens only via QR codes (and microSD), with USB-C used for power only - Three secure elements, including a chip dedicated to protecting fingerprint data - Large 4-inch 480x800 touchscreen makes transaction verification easy to read - Anti-tamper self-destruct circuit that wipes keys on physical intrusion - Broad support (5,500+ assets, 45+ software wallets) with no mandatory proprietary app - Competitive price (~$149) for the feature set ## What's not - Firmware is open source but ships some pre-compiled binaries (MH1903 MCU library, QR library), so builds are not fully reproducible — you're partly trusting binaries - Runs an Android-based OS, which independent critics note is a larger attack surface than a minimal firmware - Founded by a China-based team (formerly Cobo Vault) with devices manufactured in China — a supply-chain/origin trust concern for some buyers - A high-severity tamper-response issue and a firmware vulnerability were found in audits (both reported fixed) — good disclosure, but a reminder it's not flawless - Bulkier than pocket wallets, and native staking/features are limited versus the companion-app ecosystem **Buy it if:** Users who prioritize a true air-gap and a large, readable screen, and are comfortable with the device's origins and partial reproducibility. **Skip it if:** Purists who require fully reproducible open-source builds, or buyers uncomfortable with China-manufactured key-management hardware. ## Full review The Keystone 3 Pro is one of the most feature-rich air-gapped wallets on the market. It signs transactions exclusively via QR codes (with microSD as an alternative), using its USB-C port for power only — there is no USB-data, Bluetooth, WiFi or NFC signing path, which is the strongest form of air-gap. It stacks three secure elements, a fingerprint sensor, an anti-tamper self-destruct circuit that wipes keys if the device is opened, and a large 4-inch 480x800 touchscreen that makes verifying addresses genuinely comfortable. At around $149 with support for thousands of assets and dozens of software wallets, the spec sheet is excellent. The air-gap is the headline and it is real. Because the device never establishes a data connection, the entire class of USB and wireless attack vectors is designed out; a compromised computer can hand the Keystone an unsigned transaction as a QR code and receive a signed one back, but it has no channel to reach the keys. The three secure elements split duties — two guard key material, and a dedicated chip protects the fingerprint data — so no single chip holds everything. The device is uniquely well-integrated with wallets like MetaMask over QR, which is a nice practical touch. Openness is where the honest asterisks begin. Keystone publishes its firmware on GitHub and provides a checksum-verification workflow, and that is meaningfully more transparent than a closed device. But the build is not fully reproducible: the MH1903 microcontroller library and the QR-code library ship as pre-compiled binaries due to IP restrictions, which independent guides like Michael Flaxman's 10x Security guide flag directly — with binaries in the mix, you are partly trusting code you cannot rebuild from source. That same critique notes the device runs an Android-based OS, a larger and busier attack surface than the minimal firmware on a Coldcard or BitBox. To Keystone's credit, its security process is visible. A Keylabs audit in late 2023 found one high-severity issue (an inadequacy in the tamper-response circuit) plus several low-severity findings, all reported resolved, and in 2024 Offside Labs disclosed a firmware vulnerability that was neutralized in version 1.2.8. Publishing these is the right behavior and better than silence. It is also a reminder that the self-destruct and secure-element story is not magic — the tamper response itself needed fixing — so treat the marketing claims as engineering in progress rather than guarantees. Then there is origin. Keystone was formerly Cobo Vault, built by a China-founded team originally serving Chinese Bitcoin miners, and rebranded to Keystone in 2021; the devices are manufactured in China. For many users this is a non-issue — open code and an air-gap are exactly the mitigations that reduce how much you must trust any manufacturer. But for buyers who factor geopolitics and supply-chain provenance into key-management hardware, it is a legitimate consideration worth naming plainly rather than dismissing. Combined with the partial reproducibility, it is the main reason a strong device doesn't score higher here. The verdict is that the Keystone 3 Pro is impressive hardware with a couple of trust caveats you should decide on with open eyes. If a true air-gap, a big readable screen and broad wallet support are your priorities, and you are comfortable with the origin and the not-fully-reproducible build, it is one of the most usable air-gapped wallets available. If you demand end-to-end reproducible open-source builds or are uneasy about China-manufactured key hardware, the BitBox02 or Coldcard answer those specific worries more cleanly. **Bottom line:** Excellent air-gapped hardware with a great screen, held back from a top score by partial reproducibility and origin-trust caveats worth weighing. ## In the shop [Keystone 3 Pro](https://www.nuri.com/shop/hardware-wallets/keystone-3-pro) — $129 ## Sources (12) 1. [Keystone 3 Pro — Secured Open Source Air-Gapped Hardware & Cold Wallet](https://shop.keyst.one/products/keystone-3-pro) — Keystone (official store) 2. [Keystone 3 Pro | Air-Gapped Crypto Hardware Wallet](https://keyst.one/shop/products/keystone-3-pro) — Keystone 3. [KeystoneHQ/keystone3-firmware](https://github.com/KeystoneHQ/keystone3-firmware) — GitHub / KeystoneHQ 4. [KeystoneHQ/keystone-se-firmware](https://github.com/KeystoneHQ/keystone-se-firmware) — GitHub / KeystoneHQ 5. [Open Source Code Verification for Firmware](https://guide.keyst.one/docs/verify-checksum) — Keystone Guide 6. [Bind MetaMask with Keystone (air-gapped QR workflow)](https://support.keyst.one/3rd-party-wallets/eth-and-web3-wallets-keystone/bind-metamask-with-keystone) — Keystone Support 7. [Supported Wallets and Assets](https://keyst.one/supported-wallets-and-assets) — Keystone 8. [Keystone x Offside Labs: Redefining the Hardware Wallet Security](https://blog.keyst.one/keystone-x-offside-labs-redefining-the-hardware-wallet-security-92fcb73dbf6c) — Keystone Blog 9. [Deep Dive into Next-Gen Hardware Wallet: Crashing Keystone3 Pro Audit](https://blog.keyst.one/deep-dive-into-next-gen-hardware-wallet-crashing-keystone3-pro-audit-2729bc551d7b) — Keystone Blog 10. [10x Bitcoin Security Guide — Keystone (formerly Cobo Vault)](https://btcguide.github.io/known-issues/hardware/keystone) — Michael Flaxman / btcguide 11. [Keystone 3 Pro Review 2026: Safe Hardware Wallet?](https://coinbureau.com/review/keystone-3-pro-review) — Coin Bureau 12. [S8 E7: Lixin Liu on Cobo Vault Hardware Wallet (Rebranded as Keystone)](https://bitcoin-takeover.com/s8-e7-lixin-liu-on-cobo-vault-hardware-wallet-keystone/) — Bitcoin Takeover --- --- title: Nuri Card & Bank Support FAQ type: support-faq updated: 2026-07-16 --- # Nuri Card & Bank Support FAQ Cardholder support for the Nuri Card (issued on Wirex BaaS): declines, holds, refunds and chargebacks, limits, Apple Pay / Google Pay, and SEPA/ACH bank accounts. Source of truth for the website and for agents. ## Card declines ### 1. Why was my Nuri Card declined? A card payment can be declined for many reasons. The most common by far is simply not enough money on the card at the moment of payment — including cases where an earlier hold or pending charge is still reserving part of your balance. Other frequent causes are a wrong PIN or CVC/expiry entered, a card that is frozen or not yet activated, a merchant or country that is restricted, or the bank’s fraud checks stepping in on an unusual transaction. The message shown at the terminal or in the app tells you which of these applied. See the decline-message reference below for the exact meaning of each one. Source: https://docs.wirexapp.com/docs/decline-codes ### 2. What does my decline message mean? (full reference) Here is what each decline message means in plain language: | Message | What it means | | --- | --- | | InsufficientFunds | Not enough available balance — check for pending holds too. | | DoNotHonor | Declined without a specific reason (generic bank decline). Try again or contact support. | | BlockedCard | The card is frozen or restricted. | | Fraud | Suspected fraud — the card may be flagged as compromised, lost or stolen. | | InvalidCVV2OrCIDOrExpiryDate | Wrong CVC/CVV or expiry date entered. | | InvalidPin | Wrong PIN entered. | | ExpiredCard | The card’s expiry date has passed. | | CardNotActive | The card is not activated, or it has been closed. | | TransactionNotPermittedToCardholder | This type of transaction isn’t allowed on the card. | | AllowedNumberOfPINTriesIsExceeded | Too many wrong PIN attempts (4 total) — the card is now blocked. | | CashWithdrawalAmountIsExceeded | ATM withdrawal amount limit reached. | | CashWithdrawalCountIsExceeded | Maximum number of ATM withdrawals reached. | | InvalidMerchant | The merchant isn’t supported. | | InvalidCurrency | The transaction currency isn’t supported. | | BadAVS | The billing address check (AVS) didn’t match. | | DeclinedExternalAuthorization | Declined on the merchant’s / acquirer’s side. | | DuplicatedTransaction | A duplicate of a transaction that already went through. | | GeneralTransactionDecline | Generic decline — try again. | | Error / FormatError / TimeOutIssuer | A temporary technical error — wait a moment and retry. | > If a payment keeps failing and none of these fit, contact Nuri support with the date, amount and merchant so we can look it up. Source: https://docs.wirexapp.com/docs/decline-codes ### 3. It says insufficient funds but I have money — why? The most common reason is a hold (pre-authorisation) that is still reserving part of your balance from an earlier payment — for example a fuel station, hotel or car rental. That reserved amount isn’t available to spend until the hold clears or expires. Check your recent activity for a pending item. See “Holds & pending charges” below for how long each type lasts. Source: https://docs.wirexapp.com/docs/holds-and-authorizations ### 4. My card is blocked after entering the wrong PIN For security, the card is blocked after 4 wrong PIN attempts (message: AllowedNumberOfPINTriesIsExceeded). Contact Nuri support to unblock the card and confirm or reset your PIN. Don’t keep retrying — that won’t help once the limit is reached. Source: https://docs.wirexapp.com/docs/decline-codes ## Holds & pending charges ### 5. Money is missing from my balance but I didn’t spend it This is almost always a hold (pre-authorisation), not a final charge. Merchants like fuel stations, hotels and car-rental companies temporarily reserve an amount to make sure the funds are there. The reserved money isn’t gone — it’s held until the real charge (the “clearing”) arrives, at which point the hold is released and replaced by the actual amount. The sections below explain the most common holds and how long they last. Source: https://docs.wirexapp.com/docs/holds-and-authorizations ### 6. Why did a car rental hold extra money? Car-rental and trailer-rental companies typically place a hold of around 20% on top of the authorised amount, as a buffer for possible extras such as fuel, tolls, fines or late returns. When the final charge arrives, any excess is released automatically. If the final amount is higher than the original authorisation, the difference is charged; otherwise the 20% buffer is returned to you. Source: https://docs.wirexapp.com/docs/holds-and-authorizations ### 7. A fuel station charged more than I pumped, or the hold won’t clear At pay-at-pump fuel dispensers the card is pre-authorised before you know the final amount, so a fixed hold is placed first — sometimes €1/£1, sometimes as much as €99/£99 depending on the network. This is a hold, not the final charge. When the station sends the real amount (the clearing), the hold is released and replaced by what you actually spent. > Fuel pre-authorisation holds can last up to 32 days by design. If no clearing arrives within 32 days, the hold expires and the money is released automatically. It can’t be released manually before then unless the merchant sends the clearing. Source: https://docs.wirexapp.com/docs/holds-and-authorizations ### 8. My balance went negative (e.g. after a transport/TfL charge) Some merchants — notably transit systems like Transport for London — process transactions offline and submit them for payment after your journey. If your balance is too low when that charge finally clears, it can still go through and leave the card with a negative balance. This is initiated by the merchant or card network, not by Nuri or Wirex, and can’t be blocked or reversed at that stage. To fix it, top up the card to clear the negative balance — there’s no minimum; even a small negative amount must be covered. The card stays restricted until the balance is positive again. If you’re unsure of the exact amount, contact Nuri support and we’ll confirm it. Once topped up, the card is unblocked automatically. Source: https://docs.wirexapp.com/docs/holds-and-authorizations ## Refunds, disputes & chargebacks ### 9. How long does a refund for a failed transaction take? Refunds for failed transactions are completed within 32 calendar days. This window is fixed — it doesn’t change with the transaction type or the reason it failed. A reversal sometimes happens sooner, but 32 days is the maximum you should expect. Source: https://docs.wirexapp.com/docs/chargebacks-and-refunds ### 10. How do I dispute a transaction or request a chargeback? Contact Nuri support with the transaction details (date, amount, merchant) and what went wrong. We raise a dispute ticket for that specific transaction, and you can track its status through the same ticket. A chargeback then moves through five stages: (1) review and analysis of your explanation and the transaction; (2) submission to the processor and card scheme (Visa/Mastercard); (3) the merchant may accept it or send a rebuttal with evidence; (4) that evidence is reviewed; (5) a final outcome — if won, the funds are returned to you; if lost, they stay with the merchant. Source: https://docs.wirexapp.com/docs/chargebacks-and-refunds ### 11. How long does a chargeback take, and is there a deadline to file? - Filing deadline: no later than 120 days from the transaction date. - Eligible transactions: successful transactions only. - Typical processing time: 60–90 days from the transaction date. Because chargebacks run on the card schemes’ timelines, they can’t be rushed. File as early as you can within the 120-day window. Source: https://docs.wirexapp.com/docs/chargebacks-and-refunds ### 12. Is there a fee for a chargeback? A $25 administration fee applies only if the dispute is lost. If you win, no fee is charged at all. Source: https://docs.wirexapp.com/docs/chargebacks-and-refunds ### 13. Why was I debited again after a chargeback? This is standard, not a new or duplicate charge. When a chargeback is opened, the disputed amount is credited back to your balance and a temporary hold is placed on it while the case is investigated. When the case is resolved, the hold is either released (you won — the money is yours) or removed so the debit stands (you lost — the money returns to the merchant). Source: https://docs.wirexapp.com/docs/chargebacks-and-refunds ## Limits & restrictions ### 14. What are the card spending limits? | Limit | Amount | | --- | --- | | Per transaction | £30,000 | | Per day | £30,000 | | Per month | £30,000 | | Per 3 months | £75,000 | | Per 6 months | £100,000 | | Transactions per day | Unlimited | Need more? See “How do I increase my card limit?” below. Source: https://docs.wirexapp.com/docs/card-limits ### 15. What are the ATM / cash withdrawal limits? | Limit | Amount | | --- | --- | | Per day | £500 | | Per month | £5,000 | | Withdrawals per day | 5 | Source: https://docs.wirexapp.com/docs/card-limits ### 16. What are the SEPA (EUR) deposit and transfer limits? | Transaction | Max per transaction | Max per day | | --- | --- | --- | | SEPA deposit (EUR) | €250,000 | — | | SEPA transfer (EUR) | €50,000 | €50,000 | Source: https://docs.wirexapp.com/docs/card-limits ### 17. Why is a merchant or category blocked? Certain merchant categories can’t be paid with the card. These currently include: - Drugs, druggist sundries and chemicals (MCC 5122, 5169) - Direct-marketing insurance, travel and outbound telemarketing (MCC 5960, 5962, 5966) - Dating and escort services (MCC 7273) - Massage parlors (MCC 7297) - Government-licensed gambling (MCC 7801) If a payment to one of these is declined, it’s by policy rather than a fault with your card. Source: https://docs.wirexapp.com/docs/card-limits ### 18. Why can’t I pay in a certain country or currency? Payments to merchants in sanctioned or restricted countries are blocked. These include Afghanistan, Belarus, Bosnia and Herzegovina, Central African Republic, Cuba, DR Congo, Ethiopia, Iran, Iraq, Lebanon, Libya, Myanmar, Nicaragua, North Korea, Palestine, Russia, Sudan, Syria, Venezuela and Zimbabwe. A few currencies are also not supported for card transactions: BDT (Bangladeshi Taka), BHD (Bahraini Dinar), BYN/BYR (Belarusian Ruble), PKR (Pakistani Rupee), RUB (Russian Ruble) and SAR (Saudi Riyal). Source: https://docs.wirexapp.com/docs/card-limits ## Account & payments ### 19. Why is the exchange rate different from the one I see online? The rate on a card transaction can differ from the market rate you see on Google, and that’s expected. Depending on the currency, a payment may be converted through more than one step (for example a local currency → GBP → USD), and a foreign-exchange margin is applied. - Local currencies (UAH, RON, CZK, …): converted local → GBP → USD, plus FX. - EUR: converted EUR → USD, plus FX. - USD: no conversion. Source: https://docs.wirexapp.com/docs/account-operations ### 20. How do I cancel a subscription or recurring payment? The most reliable way is to cancel directly with the merchant — the card issuer can’t unlink a card from an active subscription, block a single merchant, or cancel a subscription on your behalf. If a merchant keeps charging and won’t stop, the alternative is to have the card reissued. A new card number stops future charges — but note the old number becomes invalid, so any other services saved to that card will need updating. Source: https://docs.wirexapp.com/docs/account-operations ### 21. How do I get a transaction statement? Nuri support can generate a statement for you through the customer support portal. Contact us with the period you need and we’ll produce it. Source: https://docs.wirexapp.com/docs/account-operations ### 22. How do I check my remaining spending limit? Contact Nuri support and we can check your remaining unused limit for you through the support portal. Source: https://docs.wirexapp.com/docs/account-operations ### 23. How do I withdraw my balance after closing my account? Your card wallet is self-custody — the funds stay at your own address, not held by Wirex — so recovery goes through Nuri, not Wirex. Contact Nuri support and we’ll guide you through the withdrawal/recovery process for your account. Source: https://docs.wirexapp.com/docs/account-operations ## Raising your limit ### 24. How do I increase my card limit? The standard cap is £30,000 per transaction and per month. Higher limits can be approved with proper justification and documentation. You’ll be asked for: the limit amount and whether it’s a one-off or ongoing; the reason for the increase; and evidence of your source of wealth (how your wealth was built) and, for one-off transactions, source of funds (where the specific money came from). | Request type | Source of funds | Source of wealth | | --- | --- | --- | | One-off | Required | Required | | Ongoing | Not required | Required | Start a limit-increase request with Nuri support and we’ll tell you exactly what to provide. Source: https://docs.wirexapp.com/docs/card-limit-increase ### 25. What documents do I need for a higher limit? You’ll usually need identity and address verification (passport / national ID / driving licence, plus a utility bill or bank statement from the last 3 months), and evidence for where the money comes from. Typical evidence by source: | Source | Documents | | --- | --- | | Salary | Recent payslip + bank statement | | Sale of property | Contract of sale + bank statement showing proceeds | | Savings | 3+ months of bank statements showing the balance | | Loan | Loan agreement + bank statement | | Inheritance / gift | Testament or donor letter + bank statement | | Investment / trading | Exchange screenshots + transaction history | | Pension | Fund statement + bank statement | | Tax refund | Tax return (within 12 months) + bank statement | Source: https://docs.wirexapp.com/docs/card-limit-increase ### 26. How long does a limit increase take? Once you’ve submitted everything, review typically takes around 24 hours. If approved, the new limit is applied the same day (when submitted before 1pm CET) or the next business day. Outcomes are: approved in full, an alternative (lower) limit offered, or declined with feedback. Source: https://docs.wirexapp.com/docs/card-limit-increase ## Apple Pay & Google Pay ### 27. Apple Pay / Google Pay won’t add my card A previous failed or inactive attempt to add the card can block new attempts. The fix is usually to have the stale token deactivated: contact Nuri support and ask us to deactivate the affected card tokens, after which you should be able to add the card again. Before retrying, remove the card from any wallets or websites where an inactive copy might still be stored. Source: https://docs.wirexapp.com/docs/tokens-and-wallet-provisioning ### 28. What do the Apple Pay / Google Pay card statuses mean? | Status | Meaning | | --- | --- | | Active | Card successfully added and usable for payments. | | Inactive | Card added but unused, provisioning failed, or removed from the wallet. | | Deactivated | Card removed from the associated wallet or service. | Source: https://docs.wirexapp.com/docs/tokens-and-wallet-provisioning ### 29. Apple Pay keeps failing to add my card (“red path”) Sometimes Apple/Visa’s own provisioning service flags a device as suspicious during tokenisation and refuses to add the card. This is triggered by that antifraud check on the device — not by your card’s status or by Nuri. These cases are reviewed individually and, honestly, can’t always be overridden — resolution isn’t guaranteed. Contact Nuri support with your details and we’ll escalate it, but the decision ultimately sits with the provisioning service. Source: https://docs.wirexapp.com/docs/tokens-and-wallet-provisioning ## Bank accounts (SEPA & ACH) ### 30. Which countries can get a SEPA (EUR) account? A SEPA (EUR) account is available in 29 countries: Austria, Belgium, Bulgaria, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden and the United Kingdom. Source: https://docs.wirexapp.com/docs/bank-account-availability ### 31. Which countries can get an ACH (USD) account? An ACH (USD) account is available in 48 countries plus all US states and territories: Andorra, Argentina, Australia, Austria, Belgium, Brazil, Bulgaria, Chile, Colombia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Gibraltar, Greece, Hong Kong, Hungary, Iceland, Indonesia, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malaysia, Malta, Mexico, Monaco, Montenegro, Netherlands, Norway, Peru, Poland, Portugal, Romania, Singapore, Slovakia, Spain, Sweden, Switzerland, Taiwan, Thailand, United Kingdom, United States and Vietnam. Source: https://docs.wirexapp.com/docs/bank-account-availability ### 32. How do I check whether a bank account is available for me? Your available account types show up as capabilities on your profile, each with a status: - Active — the bank account is available and usable. - NotFulfilled — you need to complete additional verification first. - NotAvailable — not available for your country. Developers integrating the API can read these from the user endpoint (GET /api/v2/user), which returns SepaAccount / AchAccount capabilities and their status. Source: https://docs.wirexapp.com/docs/bank-account-availability