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.
YubiKey 5 Series
Win Mac Linux Android iOS Closed-Source Sweden
Official website yubico.com/products/yubikey-5-overview
Our take
The YubiKey 5 is the benchmark for hardware security keys. It handles every protocol that matters - FIDO2 phishing-resistant login, TOTP, PIV smart card, and OpenPGP - in a single durable device that works across every major OS and most phones over NFC. The honest catch is cost: the 5 Series sits at a premium price point, and the firmware is closed-source, so you trust Yubico’s manufacturing rather than auditing the code yourself. Worth it for anyone replacing authenticator apps with genuine hardware protection.
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YubiKey 5 Series alternatives
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.
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.