Google Authenticator AlternativesOnly Open Source apps categorised as Authenticators

The best open source Authenticator alternative to Google Authenticator is Aegis Authenticator. If that doesn't suit you, our users have ranked more than 50 alternatives to Google Authenticator and many of them are open source Authenticators so hopefully you can find a suitable replacement. Other interesting open source Authenticator alternatives to Google Authenticator are Ente Auth, KeePass, Proton Authenticator and Bitwarden Authenticator.

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Google Authenticator alternatives are mainly Authenticators, but if you're looking for Password Managers you can filter on that. Other popular filters include EU, Open Source, Authenticator, Open Source + Authenticator and iPhone + Open Source. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Google Authenticator.
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Alternatives list

  1. Aegis Authenticator icon

    Aegis Authenticator

     255 likes

    Aegis Authenticator is a free, secure and open source app to manage your 2-step verification tokens for your online services.

    50 Aegis Authenticator alternatives

    Cost / License

    Application type

    Platforms

    • Android
    • F-Droid
    Aegis Authenticator screenshot 1
     
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    10
    Aegis Authenticator vs Google Authenticator Comments
    Top Positive Comment
    Guest
    2

    Simple, open source, no ad, import/export of your data

    Review by a new / low-activity user.
    KeenFlosser
    Positive
    0

    FOSS alternative to other authenticator services. Works without issues while keeping it simple and functional.

    Kelson V
    Positive
    0

    More flexible, can add an additional layer of security on top of your codes, lets you organize your codes into categories, doesn't depend on Google for cloud backups, and it's easy to import from Google Auth.

    3 of 10 comments
    • Aegis Authenticator is Free and Open SourceGoogle Authenticator is Free and Proprietary
    • Aegis Authenticator is Privacy focused, Lightweight and CustomizableGoogle Authenticator is not according to our users
  2. Ente Auth icon

    Ente Auth

     179 likes

    Generates and stores two-factor authentication tokens with device encryption, offers secure cloud backup, multi-device synchronization, offline mode, and import/export through QR, file, or manual input. Migration and restore tools reduce risk of token loss.

    39 Ente Auth alternatives

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Flathub
    • F-Droid
    • Flatpak
    Ente Auth screenshot 1
     
  4. KeePass icon

    KeePass

     1646 likes

    Free and open source password manager offering secure local storage of passwords in an encrypted database, strong AES and Twofish encryption, master key or key file access, portable version, plugin support, password generation, and optional two-factor authentication.

    243 KeePass alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Mono
    Entry Templates Plugin
     
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    6
    KeePass vs Google Authenticator Comments
    Top Positive Comment
    Guest
    1

    Of course can you use KeePass and apps that utilize kdbx files as a TOTP generator. Just read it up.

    Review by a new / low-activity user.
    Top Negative Comment
    lau22
    8

    Unrelated - doesn't provide MFA codes.

    Guest
    Negative
    0

    keepass does not do what goole auth does, 2FA OTPs

    Review by a new / low-activity user.
    3 of 6 comments
    • KeePass is Free and Open SourceGoogle Authenticator is Free and Proprietary
    • KeePass is Lightweight, Security-focused, Privacy focused and CustomizableGoogle Authenticator is not according to our users
  5. Proton Authenticator icon

    Proton Authenticator

     89 likes

    Protect your accounts with Proton Authenticator, a private and secure cross-device two-factor authentication (2FA) that works offline. Created by Proton, the creators of Proton Mail, Proton VPN, Proton Drive, and Proton Pass.

    61 Proton Authenticator alternatives

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    Proton Authenticator screenshot 1
     
  9. Keepass2Android icon

    Keepass2Android

     153 likes

    Keepass2Android is an open source password manager application for Android. It reads and writes .kdbx-files, the database format used by the popular KeePass 2.x Password Safe for Windows and other desktop operating systems.

    Cost / License

    Application types

    Platforms

    • Android
    • Android Tablet
    Keepass2Android screenshot 1
     
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    1
    Keepass2Android vs Google Authenticator Comments
    Guest
    Positive
    2

    Keepass2Android supports TOTP. The better thing is, TOTP seed works with desktop applications too. Therefore, you need only one database for desktop and mobile devices. Also, built-in Keepass keyboard allows autofill all inputs from one place, you don't need to switch between applications.

    Review by a new / low-activity user.
    • Keepass2Android is Free and Open SourceGoogle Authenticator is Free and Proprietary
    • Keepass2Android is Privacy focused and LightweightGoogle Authenticator is not according to our users
  10. 2FA Authenticator (2FAS) icon

    2FA Authenticator (2FAS)

     48 likes

    2FAS Authenticator is a simple and free application for Two Factor Authentication (2FA Authentication) which generates Time-based One-time Passwords (TOTP) and PUSH authentication*.

    67 2FA Authenticator (2FAS) alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Google Chrome
    • Mozilla Firefox
    2FA Authenticator (2FAS) screenshot 1
     
  11. FreeOTP icon

    FreeOTP

     77 likes

    FreeOTP is a two-factor authentication application for systems utilizing one-time password protocols with support for Android (6 or later) and iOS (11 or later). Tokens can be added easily by scanning a QR-code or by manually entering in the token configuration.

    57 FreeOTP alternatives

    Cost / License

    Application type

    Platforms

    • Android
    • iPhone
    • Android Tablet
    • iPad
    FreeOTP screenshot 1
     
  12. Stratum icon

    Stratum

     22 likes

    A free open-source two factor authentication app for Android. It features encrypted backups, icons, categories and a high level of customisation. It also has a Wear OS companion app.

    Cost / License

    Application type

    Platforms

    • Android
    • Android Tablet
    • Android Wear
    • F-Droid
    Stratum screenshot 1
     
    |
    1
    Stratum vs Google Authenticator Comments
    Dominik Pala
    Positive
    1

    It works on wear os and it is open-source.

    • Stratum is Free and Open SourceGoogle Authenticator is Free and Proprietary
    • Stratum is Privacy focused and LightweightGoogle Authenticator is not according to our users
  13. Authenticator Extension icon

    Authenticator Extension

     19 likes

    Authenticator generates two-factor authentication (2FA) codes in your browser. Use it to add an extra layer of security to your online accounts.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Microsoft Edge
    • Google Chrome
    • Mozilla Firefox
    Authenticator Extension screenshot 1
     
    |
    2
    Authenticator Extension vs Google Authenticator Comments
    f3l1x
    Positive
    0

    Easy, Open Source and available via Browser Addon. You can even scan the QR Code with a screenshot. BEST 2FA!!!

    Guest
    Positive
    0

    Free, open source, and a browser extension for multiple browsers so you can use it on any platform? Hell yes.

    Also it's super simple. It just does what it says on the box, no extra crap you don't want.

    Review by a new / low-activity user.
    • Authenticator Extension is Free and Open SourceGoogle Authenticator is Free and Proprietary
    • Authenticator Extension is Privacy focused and LightweightGoogle Authenticator is not according to our users
  14. OnlyKey icon

    OnlyKey

     14 likes

    OnlyKey is an open source alternative to YubiKey. OnlyKey natively supports: a hardware password manager, multiple two-factor methods (FIDO2, TOTP, and Yubico® OTP), passwordless SSH login, and OpenPGP.

    26 OnlyKey alternatives

    Cost / License

    • Paid
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Chrome OS
    OnlyKey screenshot 1
     
12 of 28 Google Authenticator alternatives