OpenOTP Authentication Server vs Proton Authenticator
| OpenOTP Authentication Server | Proton Authenticator | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | Yes | No |
| Paid from | Free | Free |
| Open source | No | No |
| Platforms | Android, api, iOS, Linux, macOS, self-hosted, Web, Windows | Android, iOS, Linux, macOS, Windows |
| Free plan | Yes | Yes |
| Code type | — | totp |
| Encrypted backup | — | Yes |
| Multi-device sync | — | Yes |
| Supported platforms | — | iOS, Android, macOS, Windows, Linux |
Both are listed in Best Authenticator Apps. On The Geeks Club, OpenOTP Authentication Server scores higher on our published basis.