The smartest way to secure your wallet.

COLDCARD is the world’s most trusted

and secure key private signing device

a.k.a Bitcoin hardware wallets.

Now available in colors Choose from a variety of colors to match your style.

We find it quite scary that some hardware wallets trust the main microprocessor with their most valuable secrets. Instead, COLDCARD uses two Secure Elements.

Buy Model Q

Connectivity

AirGap SneakerNET

Maximum security when transferring data between devices.

USB-C Connector

The industry-standard for transmitting both data and power over a single cable.

QR Scanner

COLDCARD Q feature QR Scanner done right with LED illumination, advanced scanning algorithms and serial interface.

NFC Tap

Secure & very short-range wireless transmission that sends data to your phone easily

Sleep Like a Baby Technology

Best-in-class security built in all of our COLDCARD products. Dual Secure Element for Key Storage.

Rugged & Sleek Protective cover

COLDCARD MK4 uses Microchip's ATECC608 and Maxim's DS28C36B, to store the critical master secret: the 24-word seed phrase for your BIP39 wallet.

Buy MK4

Testimonials

Alex Turner

"This hardware keeps my private keys safe and secure. It's simple to use and gives me peace of mind."

Jessica Lee

"A reliable, secure way to store my crypto. I trust it to protect my assets."

Advanced Features

Temporary seed is a temporary secret completely separate from the master seed, typically held in RAM and not persisted between reboots in the Secure Element.

Seed Vault adds the ability to store multiple temporary secrets in encrypted settings for simple recall and later use. Stored secrets are AES-256-CTR encrypted with your master seed's key.

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