Wallet directory
Best for: Air-gapped cold storage
Bitcoin-only hardware signer built for air-gapped use (PSBT via SD card or NFC). Verifiable source; the security-maximalist choice.
Coldcard is a Bitcoin-only hardware signer built for air-gapped use — you move transactions by microSD card or NFC rather than plugging into a computer. Its firmware is verifiable and its threat model is uncompromising.
It is the security-maximalist’s cold-storage device, with features (duress PINs, seed handling options) aimed at people protecting serious amounts. That focus makes it less hand-holding than some rivals; if air-gapped, verify-everything storage is your goal, it is a reference choice.
Facts describe the core product and can change — always verify on the official site before moving significant sats. Got it set up? Find places that take Bitcoin near you or check your country's Bitcoin tax rules.