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About COLDCARD

COLDCARD is made by Coinkite Inc., a Bitcoin security company founded in 2012 in Toronto, Canada. We build tools for people who take self-custody seriously.

What We Make

COLDCARD is a Bitcoin-only hardware wallet — no altcoins, no companion app, no cloud account. Every design decision prioritizes security over convenience:

  • Dual secure elements from different vendors — your seed never exists in a single chip
  • Air-gapped operation — sign transactions via microSD or QR code, never plugged into a computer
  • Open-source firmware — read it, build it, verify it yourself
  • Made in Canada — designed and assembled by our team

Current models: COLDCARD Q (full keyboard + QR scanner) and COLDCARD Mk5 (compact, affordable).

Other Coinkite Products

  • OPENDIME — Bitcoin bearer instrument on a USB stick
  • TAPSIGNER — NFC card for Bitcoin signing
  • SATSCARD — Reusable NFC card for gifting Bitcoin
  • SEEDPLATE — Steel backup for seed phrases
  • BLOCKCLOCK — Bitcoin display art device

Open Source

All COLDCARD firmware source is available here: github.com/coldcard

700+ stars. Daily commits. MIT licensed. You don't have to trust us — you can verify.

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