Alternatives to Stratum

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

  • Aegis Authenticator

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

    FreeOpen sourceAndroid

    Aegis Authenticator is also an open-source Android app with an encrypted vault, automatic backups and many imports, but lacks the Wear OS companion and mOTP support.

  • 2FAS

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

    FreeOpen sourceAndroidiOSBrowser extension

    2FAS is open source on Android and iOS, adds browser-extension push approvals, and backs up to your own Google Drive or iCloud account.

  • Ente Auth

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

    FreeOpen sourceWindowsmacOSLinuxAndroidiOSWeb

    Ente Auth adds iOS, desktop and web clients with free end-to-end encrypted cloud backup, which relies on an Ente account instead of local files.

  • Proton Authenticator

    A free two-factor authentication app from Proton with end-to-end encrypted sync between your devices and no advertising.

    FreeOpen sourceWindowsLinuxAndroid

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

  • FreeOTP

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

    FreeOpen sourceAndroidiOS

    FreeOTP is open source on Android and iOS and available on F-Droid, but its project site offers little documentation and no mention of encrypted backups.

  • Google Authenticator

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

    FreeProprietaryAndroidiOS

    Google Authenticator is closed source on Android and iOS, with optional code sync through a Google Account instead of local encrypted backups.

  • Authy

    Mobile two-factor authenticator with encrypted cloud backup.

    FreeProprietaryAndroidiOS

    Authy is closed source on Android and iOS with encrypted cloud backup and multi-device sync, but ties account recovery to a phone number.

  • Bitwarden Authenticator

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

    FreeProprietaryAndroidiOS

    Bitwarden Authenticator is a free closed-source app for Android and iOS from a password manager vendor, with few published details about import, export or backup.

Similar software

Related functionality, not a direct replacement.