OpenOTP Authentication Server vs Proton Authenticator
OpenOTP Authentication Server
rcdevs.com
Proton Authenticator
proton.meSide by side
| Figure | OpenOTP Authentication Server | Proton Authenticator |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 7 | 2 |
| Spec score · Authenticator apps | 8.1 (#43) | 8.8 (#9) |
| Free plan | Yes | Yes |
| Headquarters | Esch-sur-Alzette, Luxembourg | Plan-les-Ouates, Geneva, Switzerland |
| Purpose | OpenOTP is an MFA server with OTP and FIDO2 for securing user network access. | Proton Authenticator generates time-based, one-time 2FA codes on your device for an extra layer of account login security. |
| Support | The feature table lists SLA and support services as optional, and RCDevs links to product documentation and community forums. | The product page links to Proton product support. |
Plans
OpenOTP Authentication Server
- Freeware EditionPrice not published
- Enterprise EditionPrice not published
- Cloud EditionPrice not published
- On-Premise FreewareFree
- On-Premise TrialFree
- SaaS TrialFree
- OpenOTP On-Premise EditionPriced on request
In their own words
OpenOTP Authentication Server
OpenOTP Authentication Server has no write-up on Specifiction yet; its figures are above.
Proton Authenticator
Proton Authenticator generates time-based one-time codes for two-factor authentication, adding a code at login to help secure accounts. It can display codes without an internet connection, and a Proton Account is not required to use it. Signing in is optional and enables code syncing across devices. Users can import codes from Google Authenticator, 2FAS, Aegis Authenticator, Bitwarden Authenticator, Ente Auth, and LastPass Authenticator, then export their codes from the app. Backups can be stored locally or in the cloud, with end-to-end encrypted sync between devices. Proton says its servers cannot access synced data in unencrypted form; when sync is on, entries are protected with 256-bit AES-GCM. The app is open source, and its vault can be unlocked with face or fingerprint recognition. It is available for Android, iOS, Linux, macOS, and Windows; Android is also available through F-Droid. Proton Authenticator is free on all listed platforms, with no ads or tracking.