COLDCARD

Bitcoin-only hardware signer with airgapped PSBT workflows and official firmware documentation.

Product facts

Awaiting sources for: custody, platforms, lightning, availability.

Facts verified: Not yet verified

No evidence linked.

Use cases

Networks

Layers Bitcoin L1

Settle order · L1 → Lightning → Sidechains → Rollups → Meta → Off-chain

Listing updated Sep 12, 2026

Status live

Repository Not linked

No long-form write-up yet. Contribute an update

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