The Best Bitcoin Hardware Wallets & Seed Phrase Backup Tools
A simple directory of the best Bitcoin signing devices, metal seed backup tools, and supporting wallet software — because your sats are best stored cold.
SeedSigner
Stateless, air-gapped DIY Bitcoin signing device built from off-the-shelf Raspberry Pi Zero components. Open source and under $50.
SeedSigner is a stateless, air-gapped Bitcoin signing device you build yourself using widely available off-the-shelf components centered on a Raspberry Pi Zero 1.3 (no WiFi or Bluetooth). Because it stores no private keys between sessions, it eliminates persistent seed storage risk entirely. SeedSigner generates BIP-39 seed phrases via dice rolls or digital photo entropy, displays native Segwit multisig XPUBs as QR codes, and signs transactions through two-way QR code exchange. It supports BIP-39 passphrases, BIP85 child seed derivation, custom derivation paths, and multiple networks. Compatible with Sparrow Wallet, Specter Desktop, BlueWallet, Nunchuk, and Keeper. Total hardware cost is typically under $50. Fully open source on GitHub.
