2FAS Auth vs Proton Authenticator
2FAS Auth
2fas.com
Proton Authenticator
proton.meSide by side
| Figure | 2FAS Auth | Proton Authenticator |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| Plans published | 1 | 2 |
| Spec score · Authenticator apps | 8.4 (#24) | 8.8 (#9) |
| Code type | totp and hotp | totp |
| Encrypted backup | Yes | Yes |
| Free plan | Yes | Yes |
| Maker | The maker is Two Factor Authentication Service, Inc., which lists an address in Henderson, Nevada. | Proton AG operates Proton services as a Swiss corporation and says Proton was launched in 2014. |
| Multi-device sync | Yes | Yes |
| Offline use | The app works offline. | The app can display your 2FA codes without an internet connection. |
| Purpose | 2FAS Auth generates two-factor authentication tokens to help users verify their identity when signing in to online accounts. | Proton Authenticator generates time-based, one-time 2FA codes on your device for an extra layer of account login security. |
| Support | 2FAS Auth offers a Help Center and a dedicated support channel on Discord. | The product page links to Proton product support. |
| Supported platforms | iOS,Android,Chrome,Brave,Firefox,Edge,Opera,Safari | iOS,Android,macOS,Windows,Linux |
Plans
In their own words
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.