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Best DIY & stateless signing devices

Top 6 models by score, from our catalog.

updated 23 Oct 2026models from 2020 on
Specter Shield
#1

Specter Shield

9.2 / 10
Secure Element chipAir-gapped signingOpen-source firmwareUSB, QR code, microSD
See specs
2 Specter Shield Lite
Specter · 2020
Shield Lite
Secure Element chipAir-gapped signingOpen-source firmwareUSB, QR code, microSD
8.2 / 10
8.2
3 Krux DIY
Krux · 2022
DIY
Air-gapped signingOpen-source firmwareQR code, microSD
7.1 / 10
7.1
4 Specter DIY
Specter · 2020
DIY
Air-gapped signingOpen-source firmwareUSB, QR code, microSD
6.1 / 10
6.1
5 Keycard Shell
Keycard · 2025
Shell
Secure Element chipAir-gapped signingOpen-source firmwareUSB-C, NFC, QR code
5.0 / 10
5.0
6 SeedSigner DIY
SeedSigner · 2021
DIY
Air-gapped signingOpen-source firmwareQR code, microSD
4.0 / 10
4.0

Close contests in this ranking

Specter ShieldvsSpecter Shield LiteSpecter ShieldvsSpecter Shield Lite9.28.2Specter Shield LitevsKrux DIYSpecter Shield LitevsKrux DIY8.27.1Krux DIYvsSpecter DIYKrux DIYvsSpecter DIY7.16.1Specter DIYvsKeycard ShellSpecter DIYvsKeycard Shell6.15.0Keycard ShellvsSeedSigner DIYKeycard ShellvsSeedSigner DIY5.04.0

Other rankings

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