Wallet
Last verified Jun 16, 2026
▣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.
◉Leadership
SeedSigner Community
Open-Source Project
SeedSigner the Man
Project lead
Keith Mukai
Lead developer
Newtonick
Lead maintainer
★Recent Reviews
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Data Provenance
✓Facts verified by 21Rates research · Jun 16, 2026
✓1 sources cited on this page
21rates.com/companies/seedsigner · structured data: Organization · Person ×4
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