4OTP vs OpenOTP Authentication Server
| 4OTP | OpenOTP Authentication Server | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | Yes |
| Paid from | $3/mo | Free |
| Open source | No | No |
| Platforms | Android, iOS, macOS, Windows | Android, api, iOS, Linux, macOS, self-hosted, Web, Windows |
| Free plan | Yes | Yes |
| Code type | totp | — |
| Encrypted backup | Yes | — |
| Multi-device sync | Yes | — |
| Supported platforms | Windows, macOS, iOS, Android | — |
Both are listed in Best Authenticator Apps. On Everything Xiaomi, OpenOTP Authentication Server scores higher on our published basis.