Coldcard Mk4 runs Bitcoin-only firmware. Ledger Stax decided to support altcoins too. One of these approaches is correct. But I'll lay out the full picture so you can see for yourself.
I've spent time with both devices. I've set them up, signed transactions, tested the firmware. What follows is what I found.
Ledger Stax: Security Incidents You Should Know
These aren't hypothetical risks. They happened. When a company has multiple critical security incidents, you have to ask: why would you trust them with your bitcoin?
The Bottom Line
Coldcard Mk4 wins by virtue of being Bitcoin-only. Why would you trust your sats to a device cluttered with altcoin code?
Under the Hood: Security
Security is the whole point. Everything else is secondary. Here's how these two handle it:
- Coldcard Mk4: Dual secure elements with extensive anti-tampering. Designed for maximum paranoia with duress features.
- Ledger Stax: Closed-source secure element with e-ink display.
Neither device opens up its full codebase. You're trusting these companies to get it right, and trusting that nobody on their team does something shady. I prefer the wallets that let anyone verify.
Coldcard Mk4 supports air-gapped operation via QR codes. Your private keys never have to touch a networked device. Every USB cable, every Bluetooth connection is an attack surface you don't need.
Feature Comparison
The specs that matter for Bitcoin security.
| Feature | Coldcard Mk4 | Ledger Stax |
|---|---|---|
| Price | $178 | $399 |
| Bitcoin-Only | Yes | No |
| Open-Source | No | No |
| Air-Gapped | Yes | No |
| Secure Element | Dual ATECC608A secure elements (belt and suspenders approach) | Closed-source |
| Connection | MicroSD (air-gapped), USB-C, NFC | USB-C, Bluetooth, Wireless Charging |
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 Coldcard Mk4 Does Better
Bitcoin-only focus (reduced attack surface). Air-gapped operation for maximum security. 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 Ledger Stax Falls Short
The core issue: Ledger Stax supports altcoins. For serious Bitcoin storage, that's a liability, not a feature.
On Altcoin Support
Every altcoin Ledger Stax supports is code that could compromise your bitcoin keys. Coldcard Mk4 doesn't carry that weight. Bitcoin-only firmware is leaner and more auditable.
The Price Question
Coldcard Mk4 is $221 cheaper at $178 versus Ledger Stax's $399. And it happens to be the better wallet too.
Market Context
Hardware wallets aren't going away. As more people realize exchanges aren't safe, devices like Coldcard Mk4 and Ledger Stax become more important. The question isn't whether to self-custody. It's how.
Who Should Buy Which?
If you value a focused, Bitcoin-only approach, go with Coldcard Mk4. If a broader feature set matters more, Ledger Stax is your pick. But for pure bitcoin security, I always lean toward the Bitcoin-only option.
What People Ask
Can I store other cryptocurrencies on these wallets?
Ledger Stax supports altcoins. Coldcard Mk4 is Bitcoin-only. I recommend the Bitcoin-only option.
Do Coldcard Mk4 and Ledger Stax support multisig?
Most modern hardware wallets support multisig setups. Check the individual reviews for specifics on each wallet's multisig implementation and supported coordinators.
Which wallet is more secure, Coldcard Mk4 or Ledger Stax?
Coldcard Mk4 has the edge on security. Bitcoin-only firmware means a smaller codebase and fewer potential vulnerabilities.
Are Coldcard Mk4 and Ledger Stax Bitcoin-only?
Coldcard Mk4 is Bitcoin-only. Ledger Stax supports multiple cryptocurrencies.
Full Reviews
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