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- Coldcard Mk2 vs Portal
Coinkite Coldcard Mk2 vs TwentyTwo Portal
What Coldcard Mk2 does better (0) and where Portal wins (1) — every spec side by side.
vs
3.0Open source6.4
Why is Coldcard Mk2 better than Portal?
Coldcard Mk2 has no measurable advantages in this pair.
Why is Portal better than Coldcard Mk2?
- Open-source firmwareNo · Coldcard Mk2: Yes
Specifications
Side by side
| Security | ||
| Secure Element chip | — | No |
| Air-gapped signing | — | No |
| 100% air-gapped | — | No |
| Supply-chain & tamper protection | — | Yes |
| Firmware & open source | ||
| Open-source firmware | No | Yes |
| Source code available | Yes | Yes |
| Reproducible builds | No | No |
| Firmware licence | — | GPLv3 |
| Upgradable firmware | Yes | Yes |
| Firmware update via | — | NFC |
| Bitcoin-only firmware / edition | — | Yes |
| Device lock | ||
| PIN lock | — | Yes |
| PIN entered on the device | — | No |
| Fingerprint unlock | — | No |
| Duress PIN / decoy wallet | — | No |
| Brick / wipe PIN | — | No |
| Wipe after failed attempts | — | No |
| Time-delayed unlock | — | No |
| Anti-phishing words | — | No |
| Keys & backup | ||
| BIP39 passphrase | — | No |
| Shamir backup (SLIP-39) | — | No |
| Seed XOR | — | No |
| BIP85 child seeds | — | No |
| 24-word seed | — | Yes |
| SeedQR backup | — | No |
| microSD backup | — | No |
| NFC backup card | — | No |
| User-added entropy (dice) | — | No |
| Stateless use (no stored keys) | — | No |
| Multiple seeds on one device | — | No |
| Bitcoin features | ||
| Multisig | — | Yes |
| Taproot | — | Yes |
| Miniscript | — | No |
| Message signing | — | No |
| Coin control | — | Yes |
| Own node connection | — | Yes |
| Tor support | — | Yes |
| Replace-by-fee | — | Yes |
| Silent Payments | — | No |
| Spending limits | — | No |
| Testnet | — | Yes |
| Supported assets | ||
| Altcoins & tokens | — | No |
| Bitcoin only | — | Yes |
| Connectivity | ||
| Signing connectivity | — | NFC |
| USB | — | No |
| Bluetooth | — | No |
| NFC | — | Yes |
| QR code camera | — | No |
| Animated QR (UR) | — | No |
| microSD signing | — | No |
| Screen & input | ||
| Screen | — | Yes |
| Screen size | — | 0.91″ |
| Screen type | — | OLED |
| Screen resolution | — | 126 × 64 |
| Touchscreen | — | No |
| Colour screen | — | No |
| Gorilla Glass | — | No |
| Controls | — | Button |
| QWERTY keyboard | — | No |
| Battery & power | ||
| Built-in battery | — | No |
| Design | ||
| Weight | — | 30 g |
| Length | — | 135 mm |
| Width | — | 65 mm |
| Thickness | — | 5 mm |
| Materials | — | Polycarbonate |
| Water / dust resistance | — | No |
| Several colours available | — | No |
| Assembled in | — | Italy |
| DIY build possible | — | Yes |
| Apps | ||
| Desktop app | — | No |
| Mobile app | — | No |
| Works with wallet apps | — | Nunchuk, Bitcoin Keeper |
| Compatible third-party wallets | — | 2 |
| Other features | ||
| FIDO2 / U2F security key | — | No |
| Password manager | — | No |
