Bitcoin Ciphers
Hardware WalletsSeed Backup & Metal Storage

SeedSigner

Online · Nationwide

A free, open-source DIY project that turns an air-gapped Raspberry Pi Zero plus a camera and small screen into a stateless Bitcoin signing device. All communication with the host wallet happens through QR codes, and no seed is stored on the hardware between uses.

Services

  • Air-gapped QR signing
  • Stateless (no stored seed)
  • DIY build from off-the-shelf parts
  • Multisig
  • Seed generation via dice

Highlights

  • #open-source
  • #diy
  • #air-gapped
  • #bitcoin-only

Source: Official website — product page. Last checked 2026-09-18. Spot an error? Tell us.

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BitBox Steelwallet Pro

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Blockstream Metal — Capsule

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Cypherock X1

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DCENT X

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ELLIPAL Seed Phrase Steel

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ellipal.com