Best Security Keys in 2026
Updated
In short: Yubico Authenticator is ranked #1 of 15 as of 5 October 2026, ahead of SafeNet MobilePASS+ and Deepnet SafeKey.
Choosing a security key means matching its authentication standards and connections to the devices and accounts you use. Compare USB connector and NFC support, biometric unlock, operating-system compatibility, and device-management options. Free-plan availability and paid-from pricing can help clarify the cost, too. The leading entries include Yubico Authenticator, Deepnet SafeKey, and SafeNet MobilePASS+, with Swissbit iShield Key 2 and FEITIAN ePass FIDO-NFC Security Key also among the first options. Check the listed details against your setup to see which keys offer the standards and connection types you need.
15 security keys ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
1 of the 15 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | Yubico AuthenticatorWindows · Mac · Linux · Android · iPhone | Three bars | — | 5 of 6 | Free | 6.8 | |
| 2 | SafeNet MobilePASS+Windows · Mac · Android · iPhone | Two bars | — | — | 4 of 6 | — | 5.7 |
| 3 | Deepnet SafeKeyWeb · Windows · Mac · Android · iPhone | One bar | — | — | 5 of 6 | — | 5.5 |
| 4 | Swissbit iShield Key 2Windows · Mac · Linux · Android · iPhone | One bar | — | — | 5 of 6 | — | 5.5 |
| 5 | FEITIAN ePass FIDO-NFC Security KeyWeb · Windows · Mac · Linux · Android · iPhone | Two bars | — | — | 6 of 6 | — | 5.4 |
| 6 | Solo 2Web · Windows · Mac · Linux · Android · iPhone | Two bars | — | — | 6 of 6 | — | 5.4 |
| 7 | Token2 T2F2-NFC-SlimWeb · Windows · Mac · Linux · Android · iPhone | Two bars | — | — | 6 of 6 | — | 5.4 |
| 8 | YubiKey 5 SeriesWeb · Windows · Mac · Linux · Android · iPhone | Two bars | — | — | 6 of 6 | — | 5.4 |
| 9 | Nitrokey 3Windows · Mac · Linux · Android · iPhone | Two bars | — | — | 5 of 6 | — | 5.3 |
| 10 | Token2 PIN+ Release3.3Windows · Mac · Linux · Android · iPhone | Two bars | — | — | 5 of 6 | — | 5.3 |
| 11 | TrustKey T110Web · Windows | No signal | — | — | 2 of 6 | — | 5.3 |
| 12 | FEITIAN Mobile AuthenticatorWindows · Android · iPhone | Two bars | — | — | 3 of 6 | — | 5.2 |
| 13 | HID ApproveWindows · Mac · Android · iPhone · API | Two bars | — | — | 4 of 6 | — | 5.2 |
| 14 | CipherTrust Secrets ManagementWeb · Self-hosted | One bar | — | — | 1 of 6 | — | 5.0 |
| 15 | Titan Security KeyWeb · Windows · Mac · Android · iPhone | One bar | — | — | 5 of 6 | — | 4.9 |
Compare all 15 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Authentication standards | NFC support |
|---|---|---|---|---|---|---|---|---|
| 1 | Yubico Authenticator | 6.8 | Free plan | Free | No | 29 one-time | FIDO2/WebAuthn, FIDO2 CTAP1, FIDO2 CTAP2, FIDO2 CTAP2.1, FIDO U2F | Yes |
| 2 | SafeNet MobilePASS+ | 5.7 | No | — | — | — | FIDO2.1 and PKI | No |
| 3 | Deepnet SafeKey | 5.5 | No | — | — | — | FIDO U2F, FIDO2 WebAuthn, OATH HOTP, OATH TOTP, PIV Smartcard | Yes |
| 4 | Swissbit iShield Key 2 | 5.5 | No | — | — | — | WebAuthn, FIDO2/CTAP2.1, FIDO U2F/CTAP1, HOTP, TOTP, PIV-compatible, MIFARE DESFire EV3, HID SEOS, LEGIC advant/neon | Yes |
| 5 | FEITIAN ePass FIDO-NFC Security Key | 5.4 | No | — | No | 35 one-time | FIDO U2F, FIDO2, OATH HOTP/TOTP | Yes |
| 6 | Solo 2 | 5.4 | No | — | No | 34 one-time | FIDO2, WebAuthn, U2F | No |
| 7 | Token2 T2F2-NFC-Slim | 5.4 | No | — | No | — | FIDO2.1 WebAuthn, FIDO U2F, CTAP2.1, HOTP, TOTP, OpenPGP, PIV | Yes |
| 8 | YubiKey 5 Series | 5.4 | No | — | No | 58 one-time | FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP, OATH-HOTP, PIV smart card, OpenPGP | Yes |
| 9 | Nitrokey 3 | 5.3 | No | — | No | — | WebAuthn, CTAP2/FIDO2, CTAP1/FIDO U2F 1.2, HOTP RFC 4226, TOTP RFC 6238, HOTP verification | Yes |
| 10 | Token2 PIN+ Release3.3 | 5.3 | No | — | No | 8.04 one-time | FIDO2.1 WebAuthn, FIDO U2F, CTAP2.1, PIV, OpenPGP | Yes |
| 11 | TrustKey T110 | 5.3 | No | — | — | — | FIDO2, FIDO U2F, HOTP, TOTP | — |
| 12 | FEITIAN Mobile Authenticator | 5.2 | No | — | No | 69 one-time | FIDO2, FIDO U2F; PIV on selected models | No |
| 13 | HID Approve | 5.2 | No | — | No | — | FIDO U2F, FIDO2 CTAP, OATH HOTP, OATH TOTP, OATH OCRA, PKI/PIV | Yes |
| 14 | CipherTrust Secrets Management | 5.0 | No | — | — | — | FIDO2.1, U2F, WebAuthn | Yes |
| 15 | Titan Security Key | 4.9 | No | — | No | — | FIDO2, FIDO CTAP1, FIDO open standards | Yes |
Is your app on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which security key is ranked first on Freedom251?
Yubico Authenticator is ranked #1 of 15 with a score of 6.8. SafeNet MobilePASS+ is second and Deepnet SafeKey third.
How many of these have a free plan?
1 of the 15 on this page publish a free plan on their own pricing pages.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.