Bitcoin Security and Fun Devices

Made in Canada

Coinkite is a leader in security and hardware manufacturer, est. block 141,000.
Maker of some of the most iconic Bitcoin products, such as OPENDIME, COLDCARD, BLOCKCLOCK, SATSCARD, TAPSIGNER and SATSCHIP.
Don't Trust–Verify

Bitcoin self-custody tools

What is Coinkite?

Coinkite is a Canadian Bitcoin security and hardware company founded in 2012. Coinkite makes COLDCARD Bitcoin hardware wallets, OPENDIME physical Bitcoin bearer devices, BLOCKCLOCK Bitcoin displays, TAPSIGNER and SATSCARD NFC signing cards, SATSCHIP chips, and seed backup products for Bitcoin self-custody.

Bitcoin-only security

Coinkite products are built for Bitcoin users who want practical self-custody tools instead of generic crypto gadgets.

Air-gapped workflows

COLDCARD wallets support offline signing flows that keep private keys away from internet-connected computers.

Physical Bitcoin tools

OPENDIME, SATSCARD, TAPSIGNER, and SATSCHIP make Bitcoin easier to hold, gift, sign, verify, and embed.

Coinkite product guide

Find the right Coinkite tool for your Bitcoin self-custody workflow, then jump to the full product card below.

Coinkite FAQ

Who makes COLDCARD?

COLDCARD is made by Coinkite, a Canadian Bitcoin hardware and security company founded in 2012.

Is Coinkite Bitcoin-only?

Coinkite focuses on Bitcoin self-custody, Bitcoin hardware wallets, physical Bitcoin tools, and related security products.

What is OPENDIME?

OPENDIME is a small USB device for holding and passing Bitcoin as a sealed physical bearer instrument.

What is TAPSIGNER?

TAPSIGNER is an NFC signing card that stores a Bitcoin private key and signs mobile wallet transactions by tap.

Best for: Bitcoin hardware wallet self-custody
Helps by: Signs transactions while keeping private keys offline.

Our flagship hardware wallet! The COLDCARD Q has a full QWERTY keyboard, a larger LCD screen that's easy to read, a real QR scanner and much more!

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Best for: Bitcoin hardware wallet self-custody
Helps by: Signs transactions while keeping private keys offline.

An Open & Ultra-secure Hardware Wallet! COLDCARD Mk5 is a Bitcoin hardware wallet, it signs transactions to keep the private keys offline.

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Best for: Physical Bitcoin bearer gifts and hand-to-hand transfers
Helps by: Lets bitcoin move like a sealed physical bearer instrument.

World's 1st and only Real Physical Bitcoin. Opendime is a small USB stick that allows you to spend Bitcoin like a dollar bill. Pass it along multiple times.

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BLOCKCLOCK® mini

Best for: Bitcoin data display
Helps by: Shows block height, price, and other Bitcoin network data.

Our second Bitcoin Data Display. Track #bitcoin price, see blocks as they are published and connect Opendimes to display balance, fiat value, and deposit QR.

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BLOCKCLOCK® micro

Best for: Bitcoin data display
Helps by: Shows block height, price, and other Bitcoin network data.

Our smallest Bitcoin Data Display. Track the bitcoin block height, price, and other metrics right on your desk!

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SEEDPLATE®

Best for: Seed phrase backup
Helps by: Stores seed words on steel for durable backup.

Single 24 word plate, 12 words per side! Quality, thick steel, cut and etched in Canada. Etched text marks chemically colored in black for better legibility

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TAPSIGNER®

Best for: NFC mobile wallet signing
Helps by: Stores a Bitcoin private key on a card and signs by tap.

The simple Bitcoin wallet in your pocket. TAPSIGNER is a Bitcoin private key on a card! With it you can sign mobile wallet transactions by tapping the card on your phone.

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SATSCARD™

Best for: Reusable Bitcoin cards
Helps by: Gives Bitcoin users a cash-like NFC card experience.

Like cash in hand, pass physical Bitcoin along multiple times. SATSCARD is new type of OPENDIME^® in an NFC card form factor with ten times the reuse capacity.

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SATSCHIP™

Best for: Bitcoin art and authentication
Helps by: Embeds a Bitcoin private key into artwork or physical objects.

SATSCHIP is a Bitcoin private key an artist can embed into a work of art! The piece carries that private key and it can never be separated from the artwork, nor used by the artist after the art is sold.

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COLDPOWER™

Best for: Air-gapped COLDCARD power
Helps by: Powers low-power USB devices from a 9-volt battery without USB data.

Power your Coldcard and other low power USB devices from a standard 9-volt battery without any USB data concerns

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CKBunker

Best for: COLDCARD HSM signing workflows
Helps by: Operates COLDCARD in HSM mode for policy-controlled signing.

CKBunker is a python program that you run on a computer attached to a Coldcard. It will setup and operate the Coldcard in “HSM Mode” where it signs without a human pressing the OK key.

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Websites

BitcoinTreasuries.net

An aggregated list of public/private companies, governments, funds, ETFs and other entities that hold bitcoin.

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Bitcoin.holiday

Track all important bitcoin dates in the Bitcoin Holiday Calendar, from the release of the white paper to the death of Mt. Gox and everything in between and since then.

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BitcoinMemes.info

Bitcoin memes for every occasion. We've collected them all and aggregated them in one place. Browse, share, and contribute your own.

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Bitcoin.review

Catch up on updates and Commentary on Bitcoin and related projects and products from around the community.

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BitcoinBounties.org

A collection of bounties for #Bitcoin projects. The #Bitcoin bounty list for devs.

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BitcoinBinary.org

Complex problems, simple solutions... less fud. A repository of Reproducible Build Proofs for Bitcoin Projects.

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Blockwatch.live

Track prices from exchanges, see blocks as they are published by miners, and connect the Opendime to display balance, fiat value, and deposit QR codes on any digital display like your iWatch.

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BitcoinBlackFriday.org