About
Proton Authenticator is an open-source, end-to-end encrypted authenticator app for storing two-factor authentication codes. Your 2FA codes are stored entirely on your device with no cloud sync, giving you complete control over your data. The app supports effortless migration from Google Authenticator, Authy, and other authenticators, includes secure backup and export options, and works offline on mobile and desktop. Built by Proton Mail under Swiss privacy laws, it requires no Proton account, contains no ads or tracking, and is free to use.
Highlights
- End-to-end encrypted 2FA codes stored entirely on your device
- Effortless import from Google Authenticator, Authy, and other apps
- Secure backup and export with full user control
- Offline support on mobile and desktop apps
- Open source code with no tracking or ads
Best for
Users seeking a privacy-focused alternative to cloud-based authenticators who want complete control over their two-factor authentication codes and prefer local device storage over cloud synchronization.
At a glance
Proton Authenticator is rated 4.1 out of 5 from 70 ratings and is available on iOS, Android, Windows, macOS, and Linux — all free to download.
It is developed by Proton AG.
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