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BitBox02 vs Coldcard

Comparing
two wallets
Decided by
Editorial rating
Last reviewed
2026-08-25
BitBox024.6

Swiss made, fully open source, sold in Multi and Bitcoin-only editions, with a Nova model that works from an iPhone.

Coldcard3.4Bitcoin-onlyWarning

Bitcoin-only air-gapped signer whose seed generation was weakened by a build error from March 2021 until fixed firmware landed on July 31, 2026.

Verdict: BitBox02

BitBox02 rates higher on our rubric: 4.6 against 3.4 for Coldcard.

Criterion
Editorial rating
BitBox02
4.6
Coldcard
3.4

BitBox02 and Coldcard, fact by fact

Every row is from the two reviews as of their review dates, with sources on each. A check marks the side a decidable criterion favours; rows without one are information, not a score.

BitBox02 and Coldcard compared fact by fact from their reviews; a check marks the side a decidable criterion favours.
FactBitBox02Coldcard
Editorial rating4.6 (favoured on this row)3.4
StatusAvailableCaution: see the review
Made byBitBoxCoinkite
PriceNot published$189
Who holds the keysself-custodial, keys held in a dual chip design, certified EAL6+ on the Nova modelself-custodial, keys held behind two secure elements from different vendors, signing air-gapped by choice
Bitcoin-onlyNoYes
Runs oniOS, Android, Windows, macOS, LinuxWindows, macOS, Linux
ScreenMonochrome OLED with touch sliders; the Nova uses a more readable glass OLEDQ: 3.2 inch LCD with a full keyboard. Mk5: bright OLED with a numeric keypad
ConnectivityUSB-C on both models; the Nova adds Bluetooth for iPhone and iPadUSB-C, microSD, NFC, QR scanner on the Q and a virtual disk mode, every path off by default
ReleasedNot statedCoinkite has made Coldcard since 2017; the Q and the Mk5 are the current models
Countries on the maker's listNo published listNo published list
Last reviewed2026-08-252026-08-25

Pros and cons, side by side

BitBox02

What works

  • Fully open source firmware, in a Multi edition and a true Bitcoin-only edition
  • Dual chip design, with an EAL6+ certified secure chip on the Nova
  • microSD backup makes setup and recovery fast, and writing down the words is optional
  • Three built-in on-ramps (Pocket Bitcoin, MoonPay, BTC Direct) send coins straight to the device
  • The Nova works with an iPhone or iPad over Bluetooth

What to watch

  • No touchscreen: confirmations happen on a small OLED with touch sliders
  • The original BitBox02 has no iOS support, so an iPhone user needs the Nova
  • BitBox publishes no shipping country list, only regional tiers and a duty policy
  • Shipping cost and any unpaid import duties are only shown at checkout

Coldcard

What works

  • Bitcoin only, which keeps every other chain's parsing code off the device
  • Two secure elements from independent vendors, so one chip flaw is not enough
  • Air-gapped signing over QR, microSD, NFC or virtual disk, with all data paths disabled by default
  • Reproducible open source firmware that advanced users can build and verify themselves
  • Duress PIN, brick PIN and login countdown for coercion scenarios
  • Coinkite's advisory published the technical cause, the entropy estimates and step by step migration instructions

What to watch

  • A March 2021 build error weakened seed generation for over five years, and updating the firmware does not repair an affected seed
  • Migrating means generating a new seed and moving every coin, which costs an on-chain transaction and real care
  • Coinkite publishes no loss total, so the scale rests on outside estimates from TRM Labs and Galaxy Research
  • Steeper learning curve than a Ledger or a Trezor, with no companion app of its own
  • Coinkite publishes no shipping country policy at all

Frequently asked questions

Is BitBox02 or Coldcard better?

BitBox02 rates higher on our rubric: 4.6 against 3.4 for Coldcard. The rating follows the product rubric published on our about page; the rows above set custody, price and platforms side by side so you can check it.

Is BitBox02 or Coldcard bitcoin-only?

Coldcard is bitcoin-only; BitBox02 supports other assets too. Multi edition supports bitcoin plus other assets; the Bitcoin-only edition runs firmware with the rest removed

Does BitBox02 or Coldcard carry a warning?

Coldcard: A build error introduced in a March 2021 firmware migration left seed generation drawing on a software pseudorandom number generator instead of the hardware one, and attackers found it before Coinkite did. Coinkite published fixed firmware for every affected model and updated its advisory on August 1, 2026, but updating does not repair a seed already generated on affected firmware: those owners have to create a new seed and move their coins.

The full reviews: BitBox02 and Coldcard, each with its sources, and every wallet we review.

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