Crypto hardware wallet comparison Coldcard Mk4 vs Trezor Safe 3

Our impressions

Coldcard Mk4

Trezor Safe 3

Pros
not reviewed yet
  • Small form factor and very portable
  • Excellent value at an affordable price point
  • Phenomenally intuitive and efficient on-device recovery, PIN and seedphrase entry

Cons
not reviewed yet
  • Requires constant USB connection to operate
Verdict
not reviewed yet

Finally the first line of Trezor products incorporating a secure element has arrived. In our opinion it easily takes the lead in the current Trezor product lineup – in terms of security and portability. Even with the launch of the newer Trezor Safe 5 it’s easily our price/performance winner.

Even though the device uses only two buttons for input, like the Model One did, and does not offer a touch-screen, like the Model T and Safe 5, its on-device recovery, PIN and seedphrase entry are phenomenal. Trezor really did something truly special with the way they handle user input despite the minimalist form factor. At less than half the price of the Trezor Safe 5 it is an easy recommendation.

Read more about the new generation of Trezor Safe 3 products.

Disclaimer: Our impressions are based on a compilation of factors tailored to the average user’s perspective. It is also important to note that whether a feature is a “pro” or “con” can depend on your situation and preferences. What may be an advantage in one scenario could be a challenge in another, and vice versa. Therefore, while reviewing these points, it’s essential to consider your unique requirements and circumstances when making decisions. This list aims to provide an idea of what to anticipate, but it is not the ultimate guide to determining whether something will work for you or not.

Key features

Coldcard Mk4

Trezor Safe 3

Release year

2022

2023

Supported coins

Supports only Bitcoin

Supports multiple coins, Bitcoin-only mode available

  • BTC, ETH, LTC, XLM , DOGE, DASH, ZEC, NEM,
  • and a thousand others. See a full list at trezor.io/coins
Open source
  • Firmware
  • Companion software
  • Firmware
  • Companion software
Seedphrase support
  • BIP-39 (Mnemonic phrase)
  • Passphrase
  • BIP-39 (Mnemonic phrase)
  • SLIP-39 (Shamir backup)
  • Passphrase
Security protections
  • Secure element
  • On device PIN entry
  • Factory reset with wrong PIN
  • Factory reset with decoy PIN
  • Fake wallet with duress PIN
  • On device passphrase entry
  • On device recovery

Dual Secure Element
Multiple Trick PIN features
– Duress PIN
– Countdown to Brick (or Reset) PIN
– Brick Me PIN
– Login Countdown
On device recovery requires a previous SD Card backup or XPRV private key file on SD Card

  • Secure element
  • On device PIN entry
  • Factory reset with wrong PIN
  • Factory reset with decoy PIN
  • On device passphrase entry
  • On device recovery

Secure Element protected Certified Chip EAL6+

Platform compatibility
  • Windows
  • macOS
  • Linux
  • Windows
  • macOS
  • Linux
  • Android
  • iOS
  • ChromeOS

iOS view only, ChromeOS is not officially supported, but it should work via Google chrome WebUSB protocol.

Authentication token
  • FIDO U2F
  • FIDO2 Webauthn
  • SSH

Technical specifications

Coldcard Mk4

Trezor Safe 3

Dimensions

88 mm x 52 mm x 10 mm
3.46 in x 2.05 in x 0.39 in

59 mm x 32 mm x 7.4 mm
2.32 in x 1.26 in x 0.29 in

Weight

30 g
1.06 oz

14 g
0.49 oz

Display
  • Monochrome
  • OLED

128 x 64 pixels

  • Monochrome
  • OLED

Monochrome display
128 x 64 px

Connectivity
  • USB-C
  • NFC
  • USB-C
Storage
  • microSD card
Processor

120 MHz CPU

180MHz embedded ARM processor (Cortex M4)

Safety & Certifications

CE and RoHS certifications
Airplane and X-ray safe

Housing

Plastics

Robust plastics
Available in black and multiple colors

Where to buy

Coldcard Mk4

Trezor Safe 3