SeedSigner

About SeedSigner

SeedSigner is an open-source, air-gapped DIY Bitcoin signing device project focused on affordable self-custody and multisignature security. Users build the device from off-the-shelf hardware, typically with a Raspberry Pi Zero, and sign transactions through QR code exchange so private keys can remain offline and stateless.

Last updated: June 16, 2026

Company Details

• Website: https://seedsigner.com/
• Founded: Est. 2021
• Headquarters: N/A (Open-source project)

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