Good news: you're looking at two wallets that don't waste firmware on altcoin garbage. Bad news: you still have to pick one. Here's how they stack up.
I've used both of these wallets. I know how they feel in your hand, how the software works, and where they cut corners. Here's the honest breakdown.
The Bottom Line
Both are solid Bitcoin-only choices, but Coldcard Mk4 edges out the competition with superior features and community trust.
Why Coldcard Mk4 Wins
- Both are Bitcoin-only (good choice either way)
- Fully air-gapped operation
- MicroSD for PSBT signing
Best for: Security-paranoid Bitcoiners, Users who might face physical coercion, Technical users comfortable with complex devices, Large holders who want maximum protection.
Where Blockstream Jade Falls Short
Feature Comparison
The specs that matter for Bitcoin security.
| Feature | Coldcard Mk4 | Blockstream Jade |
|---|---|---|
| Price | $178 | $79 |
| Bitcoin-Only | Yes | Yes |
| Open-Source | No | Yes |
| Air-Gapped | Yes | Yes |
| Secure Element | Dual ATECC608A secure elements (belt and suspenders approach) | Virtual Secure Element |
| Connection | MicroSD (air-gapped), USB-C, NFC | QR codes (via phone camera), Bluetooth, USB-C |
Security Architecture
Let's get into what actually matters: how these wallets protect your bitcoin.
- Coldcard Mk4: Dual secure elements with extensive anti-tampering. Designed for maximum paranoia with duress features.
- Blockstream Jade: Virtual Secure Element with blind oracle PIN verification. Same security model as Jade Plus.
Blockstream Jade publishes everything. Full open-source firmware that anyone can audit, build, and verify. Coldcard Mk4 keeps things closer to the chest. When it comes to securing your bitcoin, I want to verify, not trust.
My Recommendation
The Coldcard Mk4 is the gold standard for paranoid security. The duress features alone set it apart. But let's be real: most people don't need this level of protection. The UX is clunky. The screen is small. The numeric keypad makes passphrases tedious. If you're a high-value target or just paranoid, get it. If you want a smooth daily driver, the Jade Plus is more practical.
What You Pay
You'll save $99 with Blockstream Jade at $79. But Coldcard Mk4's premium buys you real improvements worth the extra cost.
Market Context
Hardware wallets aren't going away. As more people realize exchanges aren't safe, devices like Coldcard Mk4 and Blockstream Jade become more important. The question isn't whether to self-custody. It's how.
What People Ask
Can I store other cryptocurrencies on these wallets?
No. Both are Bitcoin-only, which I consider a feature. Less code means fewer vulnerabilities.
Is the price difference worth it?
The winner costs more, but the security features justify it.
Which should I buy, Coldcard Mk4 or Blockstream Jade?
Coldcard Mk4. It's Bitcoin-only, which means cleaner code and a smaller attack surface.
Can I use my existing seed phrase?
Both wallets support standard BIP39 seed phrases. You can import your existing 12 or 24-word recovery phrase from any compatible wallet.
Full Reviews
Compare Coldcard Mk4 to:
Compare Blockstream Jade to:
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