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- Jade Core vs Coldcard Mk4
Blockstream Jade Core vs Coinkite Coldcard Mk4
What Jade Core does better (9) and where Coldcard Mk4 wins (12) — every spec side by side.
vs
4.9Security8.2
8.5Open source4.9
6.2Bitcoin features8.8
7.5Ease of use3.0
4.3Connectivity6.2
Why is Jade Core better than Coldcard Mk4?
- Open-source firmwareYes · Coldcard Mk4: No
- Screen size1.9″ vs 0.8″2.4×
- Anti-klepto (anti-exfil) signingYes · Coldcard Mk4: No
- Mobile appYes · Coldcard Mk4: No
- BluetoothYes · Coldcard Mk4: No
- Colour screenYes · Coldcard Mk4: No
- Desktop appYes · Coldcard Mk4: No
- FIDO2 / U2F security keyYes · Coldcard Mk4: No
- Weight20 g vs 30 g+50%
Why is Coldcard Mk4 better than Jade Core?
- Secure Element chipNo · Jade Core: Yes
- Air-gapped signingNo · Jade Core: Yes
- 100% air-gappedNo · Jade Core: Yes
- Compatible third-party wallets11 vs 14+27%
- Duress PIN / decoy walletNo · Jade Core: Yes
- Anti-phishing wordsNo · Jade Core: Yes
- Seed XORNo · Jade Core: Yes
- SeedQR backupNo · Jade Core: Yes
- microSD backupNo · Jade Core: Yes
- NFCNo · Jade Core: Yes
- microSD signingNo · Jade Core: Yes
- Thickness12 mm vs 7.5 mm+60%
Specifications
Side by side
| Security | ||
| Secure Element chip | No | Yes |
| Dual Secure Elements | — | Yes |
| Air-gapped signing | No | Yes |
| 100% air-gapped | No | Yes |
| Supply-chain & tamper protection | Yes | Yes |
| Secure boot | Yes | Yes |
| Anti-klepto (anti-exfil) signing | Yes | No |
| Firmware & open source | ||
| Open-source firmware | Yes | No |
| Source code available | Yes | Yes |
| Reproducible builds | Yes | Yes |
| Firmware licence | MIT | MIT + anti-sell clause |
| Upgradable firmware | Yes | Yes |
| Firmware update via | USB, Bluetooth | USB, 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 | No | Yes |
| Brick / wipe PIN | Yes | Yes |
| Wipe after failed attempts | Yes | Yes |
| Time-delayed unlock | No | Yes |
| Anti-phishing words | No | Yes |
| Keys & backup | ||
| BIP39 passphrase | Yes | Yes |
| Shamir backup (SLIP-39) | No | No |
| Seed XOR | No | Yes |
| BIP85 child seeds | Yes | Yes |
| 24-word seed | Yes | Yes |
| SeedQR backup | No | Yes |
| microSD backup | No | Yes |
| NFC backup card | No | No |
| User-added entropy (dice) | Yes | Yes |
| Stateless use (no stored keys) | Yes | Yes |
| Multiple seeds on one device | No | 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 | No | Yes |
| Testnet | Yes | Yes |
| Supported assets | ||
| Altcoins & tokens | No | No |
| Bitcoin only | Yes | Yes |
| Connectivity | ||
| Signing connectivity | USB-C, Bluetooth | USB-C, NFC, microSD |
| USB | Yes | Yes |
| USB-C | Yes | Yes |
| Bluetooth | Yes | No |
| NFC | No | Yes |
| QR code camera | No | No |
| Animated QR (UR) | No | No |
| microSD signing | No | Yes |
| Screen & input | ||
| Screen | Yes | Yes |
| Screen size | 1.9″ | 0.8″ |
| Screen type | IPS LCD | OLED |
| Screen resolution | 320 × 170 | 128 × 64 |
| Touchscreen | No | No |
| Colour screen | Yes | No |
| Gorilla Glass | No | No |
| Controls | Buttons | Buttons |
| QWERTY keyboard | No | No |
| Battery & power | ||
| Built-in battery | No | No |
| Wireless charging | No | No |
| Design | ||
| Weight | 20 g | 30 g |
| Length | 65 mm | 86 mm |
| Width | 30 mm | 50 mm |
| Thickness | 12 mm | 7.5 mm |
| Materials | Plastic | Plastic |
| Water / dust resistance | No | No |
| Several colours available | No | Yes |
| Warranty (months) | 0 | 0 |
| Assembled in | China | Canada |
| DIY build possible | Yes | No |
| Apps | ||
| Official apps | Windows, macOS, Linux, Android, iOS | — |
| Desktop app | Yes | No |
| Mobile app | Yes | No |
| Works with wallet apps | Bitcoin Safe, Nunchuk, Cove, Electrum, Sparrow, Specter Desktop, Blockstream Green, BlueWallet, Bitcoin Keeper, Bull, Liana | Bitcoin Safe, Theya, Wasabi, Nunchuk, Cove, Electrum, Sparrow, Specter Desktop, Blockstream Green, BlueWallet, Bitcoin Keeper, Liana, Casa, Unchained |
| Compatible third-party wallets | 11 | 14 |
| Other features | ||
| FIDO2 / U2F security key | Yes | No |
| Password manager | No | Yes |
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