Hardware wallet review
Coldcard Mk4 review
Bitcoin-only hardware wallet with dual secure elements and advanced air-gapped features.
4.8 (634 reviews)
Secure elementOpen source
Price
$148
Warranty
1y
Best for
Bitcoin maximalistsAdvanced security needsAir-gapped setups
Connectivity
USB-C, NFC, microSD
Best fit
When Coldcard Mk4 makes sense
This section focuses on where the device works well in practice: how it handles backups, what trust assumptions it asks you to make, and what trade-offs come with owning it long term.
Asset support
BTC only
Trust model
Secure element / open-source firmware
Pros, trade-offs, and operator fit
Pros
- Bitcoin-only focus
- Dual secure elements
- Open-source firmware
- Air-gapped operation via microSD
- Advanced multisig features
Trade-offs
- Bitcoin only (no altcoins)
- Steeper learning curve
- Less user-friendly interface
- No touchscreen
- Requires technical knowledge
Technical specifications
- Connectivity
- USB-C, NFC, microSD
- Supported assets
- BTC only
- Secure element
- Yes
- Multisig support
- Yes
Before you buy
Next step
If this wallet is on your shortlist, use the safety audit to check whether your backup and recovery plan are ready for it.
Open the audit