Secure your Bitcoin and sleep like a baby
BUY COLDCARD Mk4Features
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Dual Secure Element
It provides the best Physical Security. Your seed words are stored in specialized chips, designed solely to securely store secrets. Now dual-vendor!
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Verifiable Source Code
All of the Coldcard code is viewable, editable, and verifiable. You can compile it yourself.
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True Air-gap
Only signing device (hardware wallet) with option to avoid ever being connected to a computer, for its full life cycle: from seed generation, to transaction signing. Uses PSBT (BIP174) natively!
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