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




The best open source alternative to 2FA Authenticator (2FAS) is Aegis Authenticator. If that doesn't suit you, our users have ranked more than 50 alternatives to 2FA Authenticator (2FAS) and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to 2FA Authenticator (2FAS) are Proton Authenticator, Ente Auth, Bitwarden Authenticator and FreeOTP.
Aegis Authenticator is a free, secure and open source app to manage your 2-step verification tokens for your online services.




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.




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.




Requires a log in, having 2fa on multiple types of devices like the same laptop you are logging into is more secure, developed in a country with strong anti-privacy laws.
Bitwarden Authenticator generates verification codes for two-factor authentication, ensuring your identity is verified when you log into accounts.




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.




Needed a FOSS alternative to the Google Authenticator app to access my company's corporate G-suite instance. This is a simple app and works like a charm!

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.




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



Provides robust USB-based encryption, digital signing, and secure login with hardware-level secret key storage, user-defined PIN, tamper-proof smart card, open source design, email and data encryption compatibility, virus protection, and multi-platform support.


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.




Encrypted Windows app for managing 2FA codes with AEGIS-256 and Argon2id, supporting Windows Hello, portable use, multilingual interface, token import/export, QR code/manual entry, generic TOTP, local storage, and dark mode interface for enhanced security.




2FAuth is a web based self-hosted alternative to One Time Passcode (OTP) generators like Google Authenticator, designed for both mobile and desktop.


Ente is the best open source 2fa app/program out there. Its actively developed and is the only 2fa service with i desktop app as well, so if you lose your phone you can also login through other devices