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Coldcard MK4 vs Ledger Flex

Coldcard MK4
Overall Rating
Ledger Flex
Overall Rating
Visit Coldcard's Site
Visit Ledger's Site
Coldcard MK4 logo Visit Coldcard's Website Ledger Flex logo Visit Ledger's Website

Key differences

  1. Coldcard MK4 is Bitcoin-only with dual secure elements and air-gapped workflows; Ledger Flex supports 5,500+ assets with a large E Ink® touchscreen.
  2. Ledger Flex is easier for mobile users with Bluetooth and app integrations but costs more at $249 vs Coldcard's $167.94.
  3. Coldcard is built for advanced users needing full control and offline multisig; Ledger Flex suits users looking for sleek design and broad coin support.


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Price

Coldcard MK4

$167.94 USD

Ledger Flex

$249 USD

Launch

Coldcard MK4

2022

Ledger Flex

2024

Screen Size

Coldcard MK4

128x64 pixel OLED display

Ledger Flex

2.84” 16 grayscale E Ink® touchscreen

Box Includes

Coldcard MK4

  • COLDCARD™ Mk4

Ledger Flex

  • Ledger Flex hardware wallet
  • USB-C to USB-A cable
  • getting started leaflet
  • 3 recovery sheets
  • keychain strap

Security Features

Passphrase Support

Coldcard MK4

Ledger Flex

Passphrase Entry

Coldcard MK4

Device

Ledger Flex

Device or computer

PIN Protection

Coldcard MK4

Ledger Flex

Shamir Secret Sharing

Coldcard MK4

Ledger Flex

Tor Support

Coldcard MK4

Ledger Flex

Usage

Platforms

Coldcard MK4

  • Windows
  • macOS
  • Linux
  • Android
  • iOS

Ledger Flex

  • Windows
  • macOS
  • Linux
  • Android
  • iOS

Supported Coins

Coldcard MK4

Bitcoin Only

Ledger Flex

Manage 5,500+ coins and tokens, including Bitcoin, Ethereum and XRP, and install up to 100 apps.

Interfaces

Coldcard MK4

Numeric Keypad, NFC-V, USB-C, AirGap SneakerNET, Virtual Disk, MicroSD Card

Ledger Flex

USB-C, Bluetooth

Technical Details

Secure Elements

Coldcard MK4

  • Dual Secure Elements (ATECC608 & DS28C36B)
  • AES-256-CTR encrypted storage
  • COLDCARD Co-Signing (CCC)

Ledger Flex

CC EAL6+ Certified Secure Element

Open Source

Coldcard MK4


Firmware & Software

Ledger Flex


Software

FIDO Authentication

Coldcard MK4

Ledger Flex

Size

Coldcard MK4

86x50x7.5 mm (3.39x1.97x0.3 in)

Ledger Flex

78.4x56.5x7.7 mm (3.08x2.22x0.30 in)

Weight

Coldcard MK4

30g (1.1oz)

Ledger Flex

57.5g (2.0oz)

Bitcoin-Only Version

Coldcard MK4

Ledger Flex

Integration & Multisig

Integrations

Coldcard MK4

  • Nunchuk
  • Sparrow
  • Bitcoin Core
  • Electrum
  • BlueWallet
  • Casa
  • Fully Noded
  • Specter Desktop
  • Unchained
  • Wasabi Wallet
  • Coldcore
  • Theya

Ledger Flex

Multisig Support

Coldcard MK4

Ledger Flex

Company Details

Parent Company

Coldcard MK4

Coinkite

Ledger Flex

Ledger

Parent Company Founded

Coldcard MK4

2011

Ledger Flex

2014

Security Incidents

Coldcard MK4

No known security incidents

Ledger Flex

No known security incidents

Related Comparisons

Coldcard MK4 vs

Ledger Flex vs