Proton Just Launched a Cross-Platform 2FA App With No Tracking or Ads

Proton Authenticator works on desktop and mobile, syncs securely, and gives you full control with no creepy data collection required

By

Jon Fisher

Published on July 31, 2025 11:27AM EDT

Proton Authenticator mobile and desktop app — Proton Authenticator syncs 2FA codes across Windows, macOS, **linux**, Android, and iOS.
Proton AG

Byte-Sized Brief

Proton now offers an open-source 2FA app.
It works on your phone and your computer.
No tracking or ads, and syncs across all devices.

Proton, the Swiss company behind privacy tools like Proton Mail and Proton VPN, has launched a new two-factor authentication (2FA) app that works pretty much everywhere: Android, iOS, Windows, macOS, and linux. It's called Proton Authenticator, and it's meant to be a more flexible and trustworthy alternative to apps like Google Authenticator and Microsoft Authenticator. Those apps can lock you into one device and might not always offer backup options. Proton's version is open source and ad-free.

This app covers all the basics, so you get time-based one-time passcodes, offline access, biometric lock, and the ability to import from other 2FA apps from Google, LastPass, Microsoft, Bitwarden, and other companies. It also includes secure cloud sync and encrypted backups, so you can easily move between devices without losing access to your accounts. And since Proton Authenticator is open source (most 2FA apps are not), anyone can inspect the code and see how it works, making it more trustworthy than the competition.

The Bottom Line

Proton just launched a free and open-source two-factor authentication app that works on desktop and mobile. It won't track you, doesn't display ads, and syncs your codes securely across all your devices.

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