Coldcard MK4 vs Bitkey
Key differences
- Coldcard MK4 is built for advanced users with secure elements, offline microSD signing, and keypad entry; Bitkey focuses on simplicity with fingerprint login and no screen.
- Bitkey is easier to set up and use for mobile-first users with its 2-of-3 multisig and NFC tap-to-confirm, while Coldcard requires more technical understanding and manual steps.
- Coldcard provides more granular control for air-gapped Bitcoin-only custody; Bitkey trades control for convenience, relying partly on cloud-based recovery.
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Price
$167.94 USD
$150 USD
Launch
2022
2023
Screen Size
128x64 pixel OLED display
No display
Box Includes
- COLDCARD™ Mk4
Bitkey hardware device, USB-C to USB-A charging cable, Getting started guide
Security Features
Passphrase Support
Passphrase Entry
Device
-
PIN Protection
Shamir Secret Sharing
Tor Support
Usage
Platforms
- Windows
- macOS
- Linux
- Android
- iOS
- Android
- iOS
Supported Coins
Bitcoin Only
Bitcoin Only
Interfaces
- Numeric Keypad
- NFC-V
- USB-C
- AirGap SneakerNET
- Virtual Disk
- MicroSD Card
NFC, USB-C
Technical Details
Secure Elements
Dual Secure Elements - ATECC608 & DS28C36B
Fingerprint scanner, 2-of-3 multisig setup
Open Source
Firmware & Software
Software
FIDO Authentication
Size
86x50x7.5 mm (3.39x1.97x0.3 in)
56 mm x 62 mm x 13 mm (2.20 x 2.44 x 0.51 in)
Weight
30g (1.1oz)
65g (2.3oz)
Bitcoin-Only Version
Integration & Multisig
Integrations
- Nunchuk
- Sparrow
- Bitcoin Core
- Electrum
- BlueWallet
- Casa
- Fully Noded
- Specter Desktop
- Unchained
- Wasabi Wallet
- Coldcore
- Theya
- Azteco
- Blockchain.com
- Cash App
- Coinbase
- Moonpay
- Robinhood
Multisig Support
- Bitkey 2-of-3 Multisig Setup
Company Details
Parent Company
Coinkite
Block Inc.
Parent Company Founded
2011
2009
Security Incidents
No known security incidents
No known security incidents
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