Bitcoin Security and Fun Devices
Made in Canada
Coinkite is a leader in Bitcoin security and hardware, 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 hardware company founded in 2012. It makes tools for self-custody: COLDCARD signing devices, OPENDIME physical Bitcoin bearer devices, BLOCKCLOCK displays, NFC cards, SATSCHIP chips, and steel seed backups.
Bitcoin-only security
No altcoin dashboard. No custody account. Coinkite products are built for people who hold and verify bitcoin themselves.
Air-gapped workflows
COLDCARD signing flows keep private keys on the device while transactions move through offline-friendly workflows.
Physical Bitcoin tools
OPENDIME, SATSCARD, TAPSIGNER, and SATSCHIP turn key handling into physical objects you can hold, gift, tap, verify, or embed.
Coinkite product guide
Start with the job you need done: sign, gift, tap, display, back up, or power a device offline.
Coinkite FAQ
Who makes COLDCARD?
COLDCARD is made by Coinkite, a Canadian Bitcoin hardware company founded in 2012.
Is Coinkite Bitcoin-only?
Yes. Coinkite focuses on Bitcoin self-custody hardware, physical Bitcoin tools, and related security products.
What is OPENDIME?
OPENDIME is a small USB stick that can hold bitcoin as a sealed physical bearer instrument.
What is TAPSIGNER?
TAPSIGNER is an NFC card that stores a Bitcoin private key and signs mobile wallet transactions with a tap.
Best for Bitcoin hardware wallet self-custody
Helps by Signs transactions while keeping private keys offline.
Full-keyboard COLDCARD for offline Bitcoin signing. COLDCARD Q adds a QWERTY keyboard, larger screen, QR scanner, MicroSD, USB-C, and NFC options for self-custody workflows.
Best for Bitcoin hardware wallet self-custody
Helps by Signs transactions while keeping private keys offline.
Verifiable, Bitcoin-only signing device. COLDCARD Mk5 signs Bitcoin transactions while private keys stay on the device, away from networked computers.
Best for Physical Bitcoin bearer gifts and hand-to-hand transfers
Helps by Lets bitcoin move like a sealed physical bearer instrument.
Physical bitcoin you can pass hand to hand. Load it, verify it, and pass it along. The private key stays sealed until someone breaks the seal to spend.
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.
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!
SEEDPLATE®
Best for Seed phrase backup
Helps by Stores seed words on steel for durable backup.
Write seed words on steel, not paper. A 2mm steel backup plate for 24-word or compact 12-word seed phrase storage.
TAPSIGNER®
Best for NFC mobile wallet signing
Helps by Stores a Bitcoin private key on a card and signs by tap.
A Bitcoin private key on an NFC card. Tap with a compatible mobile wallet to sign transactions while the key stays on the card.
SATSCARD™
Best for Reusable Bitcoin cards
Helps by Gives Bitcoin users a cash-like NFC card experience.
Reusable physical bitcoin cards. SATSCARD brings the OPENDIME bearer-instrument idea to an NFC card with multiple slots for reuse.
SATSCHIP™
Best for Bitcoin art and authentication
Helps by Embeds a Bitcoin private key into artwork or physical objects.
A Bitcoin key you can embed in art. The chip binds a private key to a physical work so the buyer can verify the piece and control the key after sale.
COLDPOWER™
Best for Air-gapped COLDCARD power
Helps by Powers low-power USB devices from a 9-volt battery without USB data.
Power COLDCARD without a computer USB port. Run low-power USB devices from a standard 9-volt battery when you want power, not data.
CKBunker
Best for COLDCARD HSM signing workflows
Helps by Operates COLDCARD in HSM mode for policy-controlled signing.
Run COLDCARD HSM signing from a policy-controlled machine. CKBunker sets up and operates COLDCARD in HSM mode so approved transactions can be signed without pressing OK each time.