Aegis Authenticator is a free, secure and open source app to manage your 2-step verification tokens for your online services.
Cost / License
- Free
- Open Source (GPL-3.0)
Application type
Platforms
- Android
- Android Tablet
- F-Droid
- OpenAPK
Netherlands
EU
Open Source OTPClient AlternativesAuthenticators and other similar apps like OTPClient
The best open source alternative to OTPClient is Aegis Authenticator. If that doesn't suit you, our users have ranked more than 50 alternatives to OTPClient and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to OTPClient are Proton Authenticator, Bitwarden Authenticator, 2FA Authenticator (2FAS) and Stratum.
Alternatives list
- 65 Aegis Authenticator alternatives
79 Proton Authenticator alternativesProtect 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.
Cost / License
- Free
- Open Source (GPL-3.0)
Application type
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- F-Droid
- OpenAPK
Switzerland
+3
Bitwarden Authenticator generates verification codes for two-factor authentication, ensuring your identity is verified when you log into accounts.
Cost / License
- Free
- Open Source (GPL-3.0)
Application type
Platforms
- Android
- iPhone
- Android Tablet
- iPad
United States
84 2FA Authenticator (2FAS) alternatives2FAS Authenticator is a simple and free application for Two Factor Authentication (2FA Authentication) which generates Time-based One-time Passwords (TOTP) and PUSH authentication*.
Cost / License
- Free
- Open Source
Application type
Platforms
- Android
- iPhone
- Android Tablet
- iPad
- Google Chrome
- Mozilla Firefox
- United States
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
- Free
- Open Source (GPL-3.0)
Application type
Platforms
- Android
- Android Tablet
- Android Wear
- F-Droid
- OpenAPK
68 FreeOTP alternativesFreeOTP 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.
Cost / License
- Free
- Open Source (Apache-2.0)
Application type
Platforms
- Android
- iPhone
- Android Tablet
- iPad
- United States
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
- United States
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.
Cost / License
- Paid
- Open Source
Application type
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Chrome OS
- United States
+2
Mauth (pronounced Moth) is a Two-Factor Authentication app with support for TOTP and HOTP (coming soon) and compatibility with Google Authenticator.
Cost / License
- Free
- Open Source (GPL-3.0)
Application type
Platforms
- Android
- F-Droid
Georgia
Keysmith is a token generator for your two-factor authentication (2FA) logins. It supports time and hash-based one-time passwords (TOTP/HOTP).
Cost / License
- Free
- Open Source (GPL-3.0)
Application type
Platforms
- Linux
- KDE Plasma
- Linux Mobile
- Flathub
- Plasma Mobile
- Flatpak
Germany- EU
2fast (acronym for two factor authenticator supporting TOTP) is the first free, open source, two factor authenticator for Windows and Android with the ability to store the sensitive data encrypted at a place of your choice instead of a 3rd party cloud location.
Cost / License
- Free
- Open Source (GPL-3.0)
Application type
Platforms
- Windows
- Chocolatey
Gnome Authenticator is a desktop 2FA code generator for Linux desktops, like Ubuntu.
Cost / License
- Free
- Open Source (GPL-3.0)
Application type
Platforms
- Linux
- Linux Mobile
- Flathub
- GNOME
Czechia- EU
