Keycard Shell

One secure device, infinite backups

Unrivalled security with an infinite number of removable Keycards, each with their own key.

Learn more

Bundled with 2 Keycards • €109

@SchorLukas avatar

@SchorLukas

Co-founder, Safe

on X

“Amazing piece of open-source hardware and surprisingly good UX.”

Photo shared by @SchorLukas
Hardware Wallets logo

Hardware Wallets

Independent reviewer

93%

“[...] a unique approach to hardware wallet security with its modular design and open-source architecture.”

Hardware Wallets review photo
@PatrickAlphaC avatar

@PatrickAlphaC

Co-founder, Cyfrin

on X

“Wow!”

Image shared by @PatrickAlphaC
@Pol_Lanski avatar

@Pol_Lanski

Co-founder, Dappnode

on X

“Impressed by how the project is thought out.”

Photo shared by @Pol_Lanski
@vrycmfy avatar

@vrycmfy

Contributor, Logos, Status & Keycard

on X

“Revolution in hardware wallet security.”

Photo shared by @vrycmfy
@alisher avatar

@alisher

Contributor, Logos, Status & Keycard

on X

“The wallet that doesn't spy on you.”

Keycard and Shell
Transparent electronic device with keypad and screen next to a SIM card on a black background
Sale

Keycard Shell

Keycard Shell
€109,00 €149,00

Going one step further.

Feature
Shell
Keycard
Tangem
Ledger Nano X
ETH chains and BTC
Supports Ethereum, any EVM chains (L2s), BTC, BTC multisigs
Many cards, many keys
Unlimited number of cards can be used with different keys for ease of use and backups
Card can't export private keys
Private keys can never get out of the card. The card is a secure enclave that stores private keys, and performs signatures.
Card cannot be upgraded
The card cannot be updated with new firmware
Full open source design
Hardware and software are fully open source
Use your card with other wallets
Works with various wallet applications
No vendor-specific app needed
Works without proprietary vendor software
Open and expandable ecosystem
Developers and manufacturers can build on top to grow the ecosystem and benefit from it
Compatible with 10+ wallets
Supported by more than 10 different wallet applications
Clear signing
You see what you sign before confirming a transaction
Airgap-capable
Can be used completely offline without direct connection
Camera to scan QR codes
Built-in camera for QR code-based transactions
Removable battery
Battery can be easily replaced when needed

Shell: Convenient, secure and made to last

Runs for ever

Runs for ever

With the use of a very common replaceable Nokia BL-4C battery.

18+ hours

Ethereum support

Works out of the box with your favourite Ethereum wallets.

Metamask Rabby imToken Bitget
Large display

Large display

Verify the correctness of transaction data on the secure device.

2 inches

Air-gapped

Send transactions through the air via QR code standard ERC-4527.

ERC-4527

Easy to backup

Use multiple cards as backups, each protected by a unique PIN.

2 Keycards included

Bitcoin support

Works out of the box with your favourite Bitcoin wallets.

Unisat Sparrow Specter Nunchuk BlueWallet Bitcoin Safe Bull Bitcoin Bitget Cove
Keycard

Keycard

A card shaped hardware wallet

Store and trade your crypto in a simple, secure and slim hardware wallet.

Buy Keycard Learn more

From €25

Keycard Shell

Keycard Shell

A modular air-gapped hardware wallet

The most open, modular and future-proof hardware wallet system ever conceived.

Buy Shell Learn more

Bundled with 2 Keycards • €109

How to Shell

Shell: Running on open source software

Full visibility of seed phrase

Full visibility of seed phrase

All the words clearly numbered and visible ready for you to write them down.

Human readable tx data

Human readable tx data

Get a clear understanding of what you’re actually signing.

Secure PIN for each card

Secure PIN for each card

Switch your card, enter your pin, and you’re ready to sign a transaction.

Compatible QR wallets

Compatible QR wallets

Its embedded camera allows Keycard Shell to be used fully airgapped.

Block USB data transfer

Block USB data transfer

Add an extra layer of safety every time you connect your cable to charge.

Name your cards

Name your cards

Easily identify your cards by giving them a unique name.