Open Source FreeOTP AlternativesAuthenticators and other similar apps like FreeOTP

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

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Alternatives list

  1. Bitwarden icon

    Bitwarden

     1469 likes

    Open-source password manager using AES-256 and PBKDF2 SHA-256 encryption. Securely store and sync logins across iOS, Android, Windows, and more without service provider access.

    263 Bitwarden alternatives

    Cost / License

    • Freemium
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Apple Watch
    • Snapcraft
    • Microsoft Edge
    • Vivaldi
    • Google Chrome
    • Flathub
    • Microsoft SQL Server
    • Tor Browser
    • Safari
    • F-Droid
    • Software as a Service (SaaS)
    • Flatpak
    • Cloudron
    • Docker
    • Opera
    • Chocolatey
    • Mono
    • Brave
    • AppImage
    • Mozilla Firefox
    • OpenAPK
    Bitwarden screenshot 1
     
  2. KeePass icon

    KeePass

     1674 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.

    274 KeePass alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Mono
    Entry Templates Plugin
     
  5. Proton Authenticator icon

    Proton Authenticator

     118 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.

    75 Proton Authenticator alternatives

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    • OpenAPK
    Proton Authenticator screenshot 1
     
  7. Ente Auth icon

    Ente Auth

     200 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.

    56 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
    Ente Auth screenshot 2
    Ente Auth screenshot 3
     
  8. Bitwarden Authenticator icon

    Bitwarden Authenticator

     70 likes

    Bitwarden Authenticator generates verification codes for two-factor authentication, ensuring your identity is verified when you log into accounts.

    Cost / License

    Application type

    Platforms

    • Android
    • iPhone
    • Android Tablet
    • iPad
    Bitwarden Authenticator screenshot 1
    Bitwarden Authenticator screenshot 2
    Bitwarden Authenticator screenshot 3
     
  9. 2FA Authenticator (2FAS) icon

    2FA Authenticator (2FAS)

     50 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*.

    80 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
    2FA Authenticator (2FAS) screenshot 2
    2FA Authenticator (2FAS) screenshot 3
     
  10. Stratum icon

    Stratum

     24 likes

    Open-source authenticator for Android and Wear OS providing local, encrypted token storage, TOTP/HOTP support, and export options. No server communication, no corporate ties, and no data lock-in—prioritizing privacy, usability, backup, and secure multi-token management.

    Cost / License

    Application type

    Platforms

    • Android
    • Android Tablet
    • Android Wear
    • F-Droid
    Stratum screenshot 1
    Stratum screenshot 2
    Stratum screenshot 3
     
  12. Mauth icon

    Mauth

     7 likes

    Mauth (pronounced Moth) is a Two-Factor Authentication app with support for TOTP and HOTP (coming soon) and compatibility with Google Authenticator.

    Cost / License

    Application type

    Platforms

    • Android
    • F-Droid
    Mauth screenshot 1
    Mauth screenshot 2
    Mauth screenshot 3
     
  13. Tofu Authenticator icon

    Tofu Authenticator

     11 likes

    Tofu generates one-time passwords to help you protect your online accounts. These passwords are used together with your normal password when you sign into services like Google, Facebook, Dropbox, Amazon, and GitHub.

    Cost / License

    • Free
    • Open Source (ISC)

    Application type

    Alerts

    • Discontinued

    Platforms

    • iPhone
    Tofu Authenticator screenshot 1
    Tofu Authenticator screenshot 2
    Tofu Authenticator screenshot 3
     
  14. OVault icon

    OVault

     5 likes

    OVault is a super simple OTP app that lets you view and manage OTPs for all your accounts. Set up OTPs by scanning QR codes with your devices Camera App, or by manually providing the OTP secret to the app.

    Cost / License

    Application type

    Platforms

    • Mac
    • iPhone
    • iPad
    OVault screenshot 1
     
12 of 36 FreeOTP alternatives