Trezor Safe 3 vs Coldcard MK4
Key differences
- The Coldcard MK4 is Bitcoin-only with advanced air-gapped security, while the Safe 3 supports Bitcoin plus 1000+ tokens with simpler USB-based use.
- The Safe 3 is more affordable at $79, compared to Coldcard's $167.94 price tag.
- Coldcard uses a numeric keypad and dual secure elements, while the Safe 3 has a simpler OLED screen and a single EAL6+ chip with touchscreen passphrase entry.
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Launch
2023
2022
Screen Size
0.96" OLED (128x64 pixels)
128x64 pixel OLED display
Box Includes
- Safe 3 device
- USB-C cable
- backup cards
- guide
- stickers
- COLDCARD™ Mk4
Security Features
Passphrase Support
Passphrase Entry
Device or computer
Device
PIN Protection
Shamir Secret Sharing
Tor Support
Usage
Platforms
- Windows
- macOS
- Linux
- Android
- Windows
- macOS
- Linux
- Android
- iOS
Supported Coins
Bitcoin & 1000+ other coins and tokens
Bitcoin Only
Interfaces
USB-C, Buttons
- Numeric Keypad
- NFC-V
- USB-C
- AirGap SneakerNET
- Virtual Disk
- MicroSD Card
Technical Details
Secure Elements
EAL6+ certified secure chip
Dual Secure Elements - ATECC608 & DS28C36B
Open Source
Hardware & Software
Firmware & Software
FIDO Authentication
Size
59x32x7.4 mm (2.3x1.3x0.3 in)
86x50x7.5 mm (3.39x1.97x0.3 in)
Weight
14g (0.5oz)
30g (1.1oz)
Bitcoin-Only Version
Integration & Multisig
Integrations
Multisig Support ?Multi-signature wallets require multiple keys to authorize transactions (e.g., 2-of-3). Adds security by eliminating single points of failure.
Display Technology
Display Type
Monochrome OLED
Monochrome OLED (128x64)
Touchscreen
No (button controls)
No (button controls)
Build Quality
Body Material
PMMA plastic + reinforced glass
Plastic with sliding protective cover
Water Resistance ?IP67 rating means fully dustproof and can survive submersion in 1 meter of water for 30 minutes. Protects against accidental spills and drops.
Not rated
Not rated
Haptic Feedback ?Vibration feedback when pressing buttons or confirming actions. Provides tactile confirmation that your input was registered.
No
No
Connectivity & Power
Bluetooth ?Wireless connectivity for pairing with mobile devices. Enables cable-free transactions but some users prefer USB-only for security.
No
No
NFC ?Near Field Communication for tap-to-connect with compatible devices. Convenient for quick mobile transactions.
No
Yes
Wireless Charging
No
No
Cable Type
USB-C to USB-C
USB-C
Battery
No battery (USB powered)
No battery (USB powered)
Advanced Security
Quantum Ready ?Designed to receive firmware updates with quantum-resistant cryptography. Protects against future threats from quantum computers that could break current encryption.
No
Yes
Dual Secure Element ?Uses two separate secure chips instead of one. Provides redundancy and additional tamper protection for storing your private keys.
Single chip
Yes (2 chips)
iOS Compatibility ?"Full" means you can send, receive, and manage crypto on iPhone. "Limited" typically means view-only or requires desktop for transactions.
Limited (check balances only)
Full support
Company Details
Parent Company
SatoshiLabs
Coinkite
Parent Company Founded
2013
2011
Security Incidents
In March 2024, Ledger discovered a vulnerability in the microcontroller that could bypass firmware integrity checks. Trezor patched the issue, with no user funds compromised or action required.
No known security incidents
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