Foundation Passport
Airgapped Bitcoin hardware wallet. Distinguishing feature: NO USB data port for signing. All comms via QR codes + microSD.
Models
- Passport Founder's Edition (2021): touchscreen, smaller form.
- Passport Batch 2 (2022+): updated firmware.
- Passport Core (2024+): improved hardware.
Operation
- Wallet generates PSBT on phone/computer.
- User displays PSBT as animated QR on screen.
- Passport reads QR via camera.
- Passport displays signed PSBT as animated QR.
- Wallet reads it back.
For larger PSBTs: SD card transport.
Backup
- 24-word BIP39 seed.
- Optional 25th-word passphrase.
- microSD encrypted backup.
Open-source
Fully open: firmware, hardware schematics. Audit-friendly.
Compatible wallets
Wallets supporting BCUR / animated QR airgap:
- Sparrow (excellent integration).
- Specter Desktop.
- Nunchuk.
- BlueWallet (limited).
- Foundation Envoy (mobile companion app).
Compared
| Aspect | Passport | Coldcard Q | SeedSigner |
|---|---|---|---|
| Airgap method | QR + microSD only | QR / microSD / NFC | QR only |
| USB | None | USB-C | None (DIY) |
| Display | Touchscreen | Touchscreen | Small (DIY) |
| Build | Polished commercial | Polished | DIY hardware |
| Price | High | High | Low (DIY parts) |
Common issues
- QR scan failures — large PSBTs slow to transmit; use SD card for big multi-input txs.
- Microsd FAT32 only.
- Passphrase: separate from seed; easy to lose.