Coinkite intelligence brief
Coldcard Mk4
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
Editorial read
Where Coldcard Mk4 fits in a serious self-custody stack
This review focuses on how the device behaves under real operational pressure: backup discipline, firmware trust, signing ergonomics, and long-term ownership.
Asset support
BTC only
Security posture
Secure element present / open-source posture
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
Action path
Next step
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