Alternatives to Proton Authenticator

A free two-factor authentication app from Proton with end-to-end encrypted sync between your devices and no advertising. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as Proton Authenticator.

  • Ente Auth

    Open-source two-factor authenticator with end-to-end encrypted backups.

    FreeOpen sourceWindowsmacOSLinuxAndroidiOSWeb

    Ente Auth keeps open-source code and free end-to-end encrypted backups, adds macOS, iOS and web clients, and requires an Ente account instead of a Proton account.

  • 2FAS

    Open-source authenticator app with browser-extension push approvals.

    FreeOpen sourceAndroidiOSBrowser extension

    2FAS is open source and backs up to your own iCloud or Google Drive, adds browser-extension push approvals, but has no standalone desktop app.

  • Aegis Authenticator

    An encrypted two-factor authentication app for Android with real backups and imports from every other authenticator.

    FreeOpen sourceAndroid

    Aegis Authenticator is open source with an encrypted vault and broad import support, but it runs on Android only and has no cloud sync.

  • Google Authenticator

    Google's mobile app that generates one-time verification codes for two-step verification.

    FreeProprietaryAndroidiOS

    Google Authenticator is closed source and mobile only, with optional sync tied to a Google Account instead of a Proton account.

  • Microsoft Authenticator

    Microsoft's mobile authenticator app for multi-factor and passwordless sign-in to personal and work accounts.

    FreeProprietaryAndroidiOS

    Microsoft Authenticator is closed source and mobile only, and adds passwordless sign-in for Microsoft personal and work accounts.

  • Authy

    Mobile two-factor authenticator with encrypted cloud backup.

    FreeProprietaryAndroidiOS

    Authy is closed source and mobile only, with encrypted cloud backup and multi-device sync, but account recovery is tied to a phone number.

  • FreeOTP

    An open-source two-factor authentication app for Android and iOS that generates one-time codes.

    FreeOpen sourceAndroidiOS

    FreeOTP is open source and available on F-Droid, but it is mobile only with no desktop app and no sync between devices.

  • Bitwarden Authenticator

    A standalone mobile app from Bitwarden that generates and stores two-step verification codes.

    FreeProprietaryAndroidiOS

    Bitwarden Authenticator is a free, mobile-only app from Bitwarden, not open source, with few published details about import, export or backup.

Also worth comparing

These listings name Proton Authenticator as their own alternative, so the relationship runs both ways.

  • Authenticator

    A GNOME desktop app that generates two-factor authentication codes using the TOTP and HOTP standards.

    FreeOpen sourceLinux

    Proton Authenticator is open source and free, runs on Linux, Windows and Android, and syncs codes with end-to-end encryption through a Proton account.

  • OTPClient

    A GTK4 desktop app for managing TOTP and HOTP two-factor codes in encrypted databases.

    FreeOpen sourceLinuxCommand line

    Proton Authenticator runs on Linux, Windows and Android with end-to-end encrypted sync between devices, which requires a Proton account.

  • Stratum

    A free and open-source two-factor authentication app for Android with encrypted backups and Wear OS support.

    FreeOpen sourceAndroid

    Proton Authenticator is open source and free on Android, Windows and Linux, with end-to-end encrypted sync between devices through a Proton account.

  • Yubico Authenticator

    An app that shows two-factor codes from OATH credentials stored on a YubiKey.

    FreeProprietaryWindowsmacOSLinuxAndroidiOS

    Proton Authenticator is open source on Windows, Linux and Android, syncing codes with end-to-end encryption through a Proton account instead of a hardware key.

Similar software

Related functionality, not a direct replacement.