Coldcard Q (Coinkite): hardware wallets rating breakdown
It wins on the criterion that decides whether you actually lose money: it shows you exactly what you are signing, every time, with no exceptions. That is not because Coinkite is cleverer — it is because the device is Bitcoin-only, so the entire class of blind-signing risk that drains EVM users simply does not exist on it. It parses the PSBT and displays every output, amount, change and fee on its own screen. It is also genuinely air-gapped: QR scanner, dual microSD, AAA batteries, and a physical switch to kill USB. It never has to touch a computer.
It wins on the criterion that decides whether you actually lose money: it shows you exactly what you are signing, every time, with no exceptions. That is not because Coinkite is cleverer — it is because the device is Bitcoin-only, so the entire class of blind-signing risk that drains EVM users simply does not exist on it.
How the score is built
Each criterion is scored 0–10 and weighted. The median column is the middle score across every entry in this ranking, so a row reads as a position rather than a number.
| Criterion | What we measured | Weight | Score | Category median | Rank | Weighted gap |
|---|---|---|---|---|---|---|
| Security architecture | null EAL certification · published · 2026-07-14MIT + Commons Clause (source-available, NOT open source) firmware licence · sourced · 2026-07-14 · source | 30% | 8 | 6 | 3 of 13 | +0.60 |
| Clear signing | — | 15% | 10 | 6 | 1 of 13 | +0.60 |
| Recovery and seed portability | — | 15% | 9 | 8 | 1 of 13 | +0.15 |
| Company and customer-data safety | — | 10% | 9 | 7 | 1 of 13 | +0.20 |
| Connectivity and air-gap | fully — QR + microSD + battery air-gapped · published · 2026-07-14 · source | 10% | 10 | 6 | 1 of 13 | +0.40 |
| Assets and networks | — | 8% | 3 | 8 | 12 of 13 | -0.40 |
| Price and true cost | — | 7% | 4 | 6 | 10 of 13 | -0.14 |
| Maintenance | — | 5% | 8 | 7 | 3 of 13 | +0.05 |
Measured 14 July 2026 · weights and method · decided by security architecture, worth +0.60 points against the median
Security architecture: 8/10
Secure element: present or not, which chip, and the actual certification level (EAL5+, EAL6+) as published by the certifying body rather than the vendor’s marketing. Then the three questions vendors like to blur into one: is the firmware open source, is the hardware design open, and are the builds REPRODUCIBLE — can you verify that the binary on your device was built from the source you just read? Audits count only when the firm is named and the report is public.
Scored 8 of 10 against a category median of 6, which places it 3rd of 13 among hardware wallets on this criterion. At a 30% weight that is 0.60 points above the median contribution of the weighted total. The best score in the category is 9, the worst 2.
Clear signing: 10/10
Its own criterion, not a footnote to UX, because this is the hole the money actually leaves through. Does the device parse and display what you are signing — the ERC-20 approval amount, the swap destination, the EIP-712 payload — or does it show you a hash and ask you to trust the computer it is plugged into? Read from vendor documentation and firmware source. NOT hands-on: we have not bought these devices, and we say so rather than implying we pressed the buttons.
Scored 10 of 10 against a category median of 6, which places it 1st of 13 among hardware wallets on this criterion. At a 15% weight that is 0.60 points above the median contribution of the weighted total. The best score in the category is 10, the worst 0.
Recovery and seed portability: 9/10
BIP39, SLIP39/Shamir, passphrase support. The decisive question: can the seed be restored into a DIFFERENT vendor’s wallet? If it cannot, that is vendor lock-in, and it loses points — the entire premise of self-custody is that you can walk away from the company that sold you the device.
Scored 9 of 10 against a category median of 8, which places it 1st of 13 among hardware wallets on this criterion. At a 15% weight that is 0.15 points above the median contribution of the weighted total. The best score in the category is 9, the worst 5.
Company and customer-data safety: 9/10
Jurisdiction, ownership, and the history of customer-data leaks. This carries more weight than it looks: when the buyer list of a hardware wallet leaks, it publishes the names, home addresses and phone numbers of people known to hold crypto. That is a physical-safety event, not a privacy inconvenience, and it is scored as one.
Scored 9 of 10 against a category median of 7, which places it 1st of 13 among hardware wallets on this criterion. At a 10% weight that is 0.20 points above the median contribution of the weighted total. The best score in the category is 9, the worst 2.
Connectivity and air-gap: 10/10
Is the device fully air-gapped (QR or SD only), or does it require USB or Bluetooth? Which software wallets it interoperates with, from vendor documentation.
Scored 10 of 10 against a category median of 6, which places it 1st of 13 among hardware wallets on this criterion. At a 10% weight that is 0.40 points above the median contribution of the weighted total. The best score in the category is 10, the worst 2.
Assets and networks: 3/10
What the official support list actually contains, and — importantly — whether support is native on the device or delegated to third-party software with caveats. This is the vendor’s own claim; we mark it as such, because verifying it properly means buying the device and trying ten coins, which is Level C and which we have not done.
Scored 3 of 10 against a category median of 8, which places it 12th of 13 among hardware wallets on this criterion. At a 8% weight that is 0.40 points below the median contribution of the weighted total. The best score in the category is 9, the worst 3.
Price and true cost: 4/10
Vendor store price, plus any accessory the device genuinely needs to be usable. A cheap device that requires a paid dongle is not a cheap device.
Scored 4 of 10 against a category median of 6, which places it 10th of 13 among hardware wallets on this criterion. At a 7% weight that is 0.14 points below the median contribution of the weighted total. The best score in the category is 9, the worst 2.
Maintenance: 8/10
Firmware release cadence and how long old models keep receiving updates — counted from the public repository’s release history, not from a promise on the website.
Scored 8 of 10 against a category median of 7, which places it 3rd of 13 among hardware wallets on this criterion. At a 5% weight that is 0.05 points above the median contribution of the weighted total. The best score in the category is 9, the worst 2.
Other measurements
- third-party audit
- not published SOURCED
Its nearest neighbours in this ranking
| # | Entry | Security architecture | How it differs |
|---|---|---|---|
| 2 | BitBox02 / Nova (Shift Crypto) | 9 | Ahead by 1 on security architecture. |
| 3 | Blockstream Jade | 6 | Behind by 2 on security architecture. |
Questions about this score
Why does a Bitcoin-only wallet show transactions better than a multi-coin one?
+
Because there is a finite set of things a Bitcoin transaction can be, so the device can parse and display every output in full. An EVM device faces arbitrary contract calldata, which frequently cannot be rendered into something a human can verify — and 'blind signing' is where most hardware-wallet losses actually originate.
Is the Coldcard suitable for a beginner?
+
No, and it does not pretend to be. It assumes comfort with PSBTs, air-gapped workflows and a Bitcoin-only setup. If you are buying your first device to hold several assets, one of the general-purpose wallets in this rating will serve you better — and will make the verification compromise this one refuses.