Solo 2 vs YubiKey Bio Series
Solo 2
solokeys.comYubiKey Bio Series
yubico.comSide by side
| Figure | Solo 2 | YubiKey Bio Series |
|---|---|---|
| Price from | — | — |
| Free plan | — | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| Plans published | 5 | 0 |
| Spec score · Security Keys | 7.8 (#5) | 5.6 (#20) |
| Headquarters | Newark, Delaware, United States | Stockholm, Sweden |
Plans
Solo 2
- Solo 2C Security Key$34, paid once
- Solo 2 USB-A Hacker$35, paid once
- Solo 2 USB-A Security Key$35, paid once
- Solo 2A+ NFC Security Key$46, paid once
- Solo 2C+ NFC Security Key$46, paid once
In their own words
Solo 2
Solo 2 is an open-source FIDO2 security key designed to protect online accounts from phishing, account takeover, and unauthorized access. It supports FIDO2, WebAuthn, and U2F, and basic use requires no software installation or drivers. A capacitive sensor with three contact points confirms authentication when touched. The physical key stores credentials and passkeys rather than backing them up to cloud services, with capacity for approximately 100 passkeys. It works with security-key-enabled services including Google, Microsoft, Facebook, Salesforce, GitHub, Dropbox, and Twitter/X. The maker lists Chrome, Edge, Safari, Brave, and Firefox as supported browsers, alongside Windows, macOS, Linux, Android, ChromeOS, and xBSD. Solo 2+ models support NFC authentication on compatible Android and iOS devices. Standard keys ship with locked firmware and SoloKeys attestation certificates; the Hacker model has no attestation. The solo2-cli tool manages passkeys, firmware updates, PINs, PIV, and OpenPGP settings. Prices start at $34, paid once purchase; NFC models cost $46 as a one-time purchase purchase.
YubiKey Bio Series
YubiKey Bio Series has no write-up on Specifiction yet; its figures are above.