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- Coldcard Mk4 vs Coldcard Q
Coinkite Coldcard Mk4 vs Coinkite Coldcard Q
What Coldcard Mk4 does better (2) and where Coldcard Q wins (6) — every spec side by side.
vs
8.2Security8.2
4.9Open source4.9
8.8Bitcoin features8.8
3.0Ease of use5.6
6.2Connectivity7.8
Why is Coldcard Mk4 better than Coldcard Q?
- Weight30 g vs 93 g3.1×
- Thickness7.5 mm vs 22 mm2.9×
Why is Coldcard Q better than Coldcard Mk4?
- Screen size0.8″ vs 2.3″2.9×
- QR code cameraNo · Coldcard Mk4: Yes
- Colour screenNo · Coldcard Mk4: Yes
- QWERTY keyboardNo · Coldcard Mk4: Yes
- Built-in batteryNo · Coldcard Mk4: Yes
- Compatible third-party wallets14 vs 16+14%
Specifications
Side by side
| Security | ||
| Secure Element chip | Yes | Yes |
| Dual Secure Elements | Yes | Yes |
| Air-gapped signing | Yes | Yes |
| 100% air-gapped | Yes | Yes |
| Supply-chain & tamper protection | Yes | Yes |
| Secure boot | Yes | Yes |
| Anti-klepto (anti-exfil) signing | No | No |
| Firmware & open source | ||
| Open-source firmware | No | No |
| Source code available | Yes | Yes |
| Reproducible builds | Yes | Yes |
| Firmware licence | MIT + anti-sell clause | MIT + anti-sell clause |
| Upgradable firmware | Yes | Yes |
| Firmware update via | USB, microSD | microSD |
| Bitcoin-only firmware / edition | Yes | Yes |
| Device lock | ||
| PIN lock | Yes | Yes |
| PIN entered on the device | Yes | Yes |
| Fingerprint unlock | No | No |
| Duress PIN / decoy wallet | Yes | Yes |
| Brick / wipe PIN | Yes | Yes |
| Wipe after failed attempts | Yes | Yes |
| Time-delayed unlock | Yes | Yes |
| Anti-phishing words | Yes | Yes |
| Keys & backup | ||
| BIP39 passphrase | Yes | Yes |
| Shamir backup (SLIP-39) | No | No |
| Seed XOR | Yes | Yes |
| BIP85 child seeds | Yes | Yes |
| 24-word seed | Yes | Yes |
| SeedQR backup | Yes | Yes |
| microSD backup | Yes | Yes |
| NFC backup card | No | No |
| User-added entropy (dice) | Yes | Yes |
| Stateless use (no stored keys) | Yes | Yes |
| Multiple seeds on one device | Yes | Yes |
| Bitcoin features | ||
| Multisig | Yes | Yes |
| Taproot | Yes | Yes |
| Miniscript | Yes | Yes |
| Message signing | Yes | Yes |
| Coin control | Yes | Yes |
| Own node connection | Yes | Yes |
| Tor support | Yes | Yes |
| Replace-by-fee | Yes | Yes |
| Silent Payments | No | No |
| Spending limits | Yes | Yes |
| Testnet | Yes | Yes |
| Supported assets | ||
| Altcoins & tokens | No | No |
| Bitcoin only | Yes | Yes |
| Connectivity | ||
| Signing connectivity | USB-C, NFC, microSD | USB-C, NFC, QR code, microSD |
| USB | Yes | Yes |
| USB-C | Yes | Yes |
| Bluetooth | No | No |
| NFC | Yes | Yes |
| QR code camera | No | Yes |
| Animated QR (UR) | No | No |
| microSD signing | Yes | Yes |
| Screen & input | ||
| Screen | Yes | Yes |
| Screen size | 0.8″ | 2.3″ |
| Screen type | OLED | LCD |
| Screen resolution | 128 × 64 | 320 × 240 |
| Touchscreen | No | No |
| Colour screen | No | Yes |
| Gorilla Glass | No | No |
| Controls | Buttons | Buttons |
| QWERTY keyboard | No | Yes |
| Battery & power | ||
| Built-in battery | No | Yes |
| Removable battery | — | Yes |
| Wireless charging | No | No |
| Design | ||
| Weight | 30 g | 93 g |
| Length | 86 mm | 120 mm |
| Width | 50 mm | 75 mm |
| Thickness | 7.5 mm | 22 mm |
| Materials | Plastic | Plastic |
| Water / dust resistance | No | No |
| Several colours available | Yes | No |
| Warranty (months) | 0 | 0 |
| Assembled in | Canada | Canada |
| DIY build possible | No | No |
| Apps | ||
| Desktop app | No | No |
| Mobile app | No | No |
| Works with wallet apps | Bitcoin Safe, Theya, Wasabi, Nunchuk, Cove, Electrum, Sparrow, Specter Desktop, Blockstream Green, BlueWallet, Bitcoin Keeper, Liana, Casa, Unchained | Bitcoin Safe, Theya, Wasabi, Zeus, Nunchuk, Cove, Electrum, Sparrow, Specter Desktop, Blockstream Green, BlueWallet, Bitcoin Keeper, Bull, Liana, Casa, Unchained |
| Compatible third-party wallets | 14 | 16 |
| Other features | ||
| FIDO2 / U2F security key | No | No |
| Password manager | Yes | Yes |
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