Nitrokey
Open-source hardware security key line from Berlin-based Nitrokey, with models ranging from the FIDO2-only Nitrokey Passkey to the Nitrokey 3, which adds PIV smart card, OpenPGP, and TOTP support.
Linux Security Keys
The Security Keys we recommend, filtered to Linux. See all Security Keys →
YubiKey 5 Series
Full-featured hardware security key from Yubico supporting FIDO2/WebAuthn, TOTP/HOTP, smart card (PIV), and OpenPGP across multiple form factors including USB-A, USB-C, and NFC variants.
Yubico Security Key
Yubico's entry-level hardware security key offering FIDO2/WebAuthn support at a lower price point, available in USB-A and USB-C variants, with NFC on select models.