Coinkite is a Bitcoin-only hardware company based in Canada, founded by Rodolfo Novak (NVK) and Peter Gray. The company is best known for the Coldcard hardware wallet, widely regarded as one of the most secure and advanced Bitcoin signing devices available. Coinkite focuses exclusively on Bitcoin, reflecting a philosophy of building specialized, high-security tools for the Bitcoin ecosystem.
The Coldcard wallet is designed for power users and institutions who prioritize security and air-gapped operation. It supports fully offline transaction signing via microSD card, eliminating the need to ever connect the device to a computer via USB. Coldcard features a secure element chip, supports multisignature setups, and runs fully open-source firmware. The latest Coldcard models include an NFC option for tap-to-sign transactions with compatible mobile wallets.
Coinkite also produces the Opendime, a small USB device that functions as a bearer instrument for Bitcoin, allowing physical transfer of Bitcoin value similar to handing over a bill. The company also sells the Blockclock, a desk display that shows Bitcoin price, block height, and network data in real time. Coinkite's products are sold globally and are popular among Bitcoin self-custody advocates.
Core Products
- Coldcard — Air-gapped Bitcoin hardware wallet with secure element
- Opendime — Physical bearer instrument for Bitcoin transfers
- Blockclock — Real-time Bitcoin data display
- Satscard — NFC-based Bitcoin bearer card