Compare security keys

Every security keys we've reviewed, side by side. Prices are today's UK prices, checked hourly. See the ranked Top 10

Product	Protocols	Connectors (USB-A, USB-C, NFC)	Passkey slots	Firmware (open, updatable)	Price	Updates until	Score
Yubico YubiKey 5C NFC	FIDO2 L2, CTAP 2.1, FIDO U2F, smart card (PIV), OpenPGP, OATH-HOTP, OATH-TOTP, Yubico OTP, challenge-response, static password	USB-C 2.0; NFC (ISO 14443-3 Type A); no USB-A	100 discoverable FIDO2 credentials on firmware 5.7 and later; 25 on firmware 5.0 to 5.6; unlimited non-discoverable credentials	Current listed firmware 5.8	~£60	not announced	8.1/10verdict: buy
Yubico YubiKey 5 NFC	FIDO2/WebAuthn, FIDO CTAP 1, CTAP 2 and 2.1, U2F, PIV smart card, Yubico OTP, OATH-HOTP and TOTP, OpenPGP, static passwords	USB-A and NFC (ISO 14443-3 Type A); no USB-C	100 slots on firmware 5.7 and later; 25 on firmware 5.0 to 5.6	Version 5.8	~£54.40	not announced	7.3/10verdict: buy
Yubico Security Key C NFC	FIDO2 CTAP 2.1, FIDO U2F; no PIV, OpenPGP, OATH or Yubico OTP	USB-C 2.0, NFC; no USB-A	Up to 100 discoverable credentials on firmware 5.7+ (25 on firmware 5.0-5.6); unlimited non-discoverable	5.8	~£30	not announced	7.2/10verdict: good, not the best
TrustKey T110 FIDO2 Security Key	FIDO2, U2F, TOTP, HOTP (TOTP and HOTP need the TrustKey management software)	USB-A	Up to 150 resident keys (Cardlogix); eBay listing says up to 200	Updatable; the user manual directs owners to the TrustKey website for firmware updates	~£15.99	not announced	5.1/10verdict: good, not the best
Thetis FIDO2 Security Key (folding USB-A)	FIDO2 and FIDO U2F (PRO model); one Thetis page describes the USB-A folding model as U2F-only	USB-A (folding listing); PRO model adds USB-C and NFC	200 passkey slots (PRO and PRO-A models); 50 OATH slots	–	~£18.70	not announced	4.4/10verdict: skip

Prices marked ~ are the typical UK price when we researched the product; we show today's price once a retailer reports one. Value uses today's price, so it changes as prices move.

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