BitBox02 Bitcoin-only
Minimal Swiss USB-C wallet with a reduced attack surface in its Bitcoin-only edition.
Overview
The BitBox02 Bitcoin-only edition is a minimalist Swiss hardware wallet built by BitBox (formerly Shift Crypto) with a clear philosophy: strip out everything you don't need. By running firmware that supports only Bitcoin, it shrinks the codebase and attack surface compared with multi-coin devices, which is a genuine security benefit as well as a statement of focus. It's a favorite daily driver for Bitcoiners who want something simple and trustworthy.
The device is a slim USB-C stick with a touch-slider interface and a small OLED screen. Keys are held on-device behind a PIN, backed by a secure element, and transactions are confirmed on the screen. A nice touch is the included microSD-based backup: you can back up your seed straight to a card during setup, which many newcomers find less error-prone than hand-writing 24 words. The firmware is open-source, and the companion BitBoxApp is clean and approachable.
Honest caveats: it's a wired device, not air-gapped, so you connect it to a computer or phone. The touch-slider takes a little getting used to, and being Bitcoin-only means no altcoins — if you want those, choose the BitBox02 Multi edition instead. But for a buyer who wants an open-source, reduced-surface, genuinely pleasant Bitcoin wallet from a reputable Swiss maker, the BitBox02 Bitcoin-only is one of the easiest recommendations in the category.
Key features
- Bitcoin-only firmware for a reduced codebase and attack surface
- Open-source firmware and companion BitBoxApp
- Secure element plus PIN protection
- Touch-slider interface with OLED screen
- MicroSD backup option for easier seed backup
- USB-C connection (USB-A adapter for phones)
- Slim, well-built Swiss design
Specs
- connection USB-C + microSD backup
- open Source Yes
- secure Element Yes
- bitcoin Only Yes
Who it’s for
Bitcoiners wanting a simple, trustworthy open-source daily driver.
Watch: hands-on videos
BitBox02 Bitcoin-only: frequently asked questions
Why choose the Bitcoin-only edition over the Multi?
Bitcoin-only firmware has less code and a smaller attack surface. Choose it if you hold only Bitcoin; pick the Multi edition if you also want Ethereum and ERC-20 support.
Is the BitBox02 air-gapped?
No. It connects over USB-C. It does offer a microSD backup feature, but signing happens over the wired connection.
Is the microSD backup a security risk?
The backup is your encrypted seed material and should be treated as sensitively as any seed backup. It's a convenience for reliable backups, not a substitute for keeping that card safe offline.
Is it fully open-source?
The firmware and app are open-source; it also uses a secure element chip for physical protection, which is a common trade-off.
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