Secure, end-to-end encrypted, open source, and available on every device
Pros & Cons
Open-source, verifiable codebase for transparency
End-to-end encryption with offline TOTP generation
Cross-device sync with privacy protections
Biometric or PIN protection for quick, secure access
No downloads in the last 30 days (0 in the recent period)
Limited cloud-based backups or account-based sync compared to some competitors
QR code scanning and onboarding have had improvements in recent updates (ongoing refinements)
About Proton Authenticator
Proton Authenticator is a productivity app developed by Proton AG.
Download Statistics
Proton Authenticator has been downloaded 440 thousand times. In the last 30 days, the app was downloaded 27 thousand times. It is ranked #129 in productivity.
User Ratings
Proton Authenticator is rated 4.83 out of 5 stars. The rating is based on 9.9 thousand ratings.
App Information
Proton Authenticator is FREE to download. The APK download size is 48.18 MB. The latest version available is 1.3.7. The last update was on March 27, 2026.
Technical Requirements
Proton Authenticator requires Android 8.1+ or higher. The app has a content rating of Everyone. The app has been available on Google Play August 2025.
Description
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.
Proton Authenticator is open-source, end-to-end encrypted, and backed by Swiss privacy laws. It’s the safest way to generate and store your one-time passwords (TOTP) for 2FA Login.
Why Proton Authenticator?
- Free to use: No Proton account required, ad-free. - Offline support, on mobile and desktop apps - Sync your 2FA codes to all your devices with end-to-end encryption. - Enable automatic backups for peace of mind - Easily import from other 2FA apps, or export from Proton Authenticator. - Protect your account with biometrics or a PIN code. - Open-source transparency, verifiable code. - Protected by Switzerland’s privacy laws.
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Able to import from Google authenticator. Proton authenticator works great, everything is synced.
★★★★★Timothy Slazyk (Tim)· Jun 10, 2026
Superior to all others compromised systems. Just sayin' You'll figure it out the hard way. Hint: #DARPA The smartest thing any American can do is terminate their Facebook/DARPA account, but be sure to DELETE your data. Will the wicked truly delete your data? Probably not. Regardless, there is a process you MUST follow. Do this in preparation for what the Committee of 300 psychopaths has planned, and is implementing, ever so slowly, and systematically, #TotalitarianTipToe YOU HAVE BEEN WARNED!
★★★★☆Amir M. Sajedian· Jun 27, 2026
I like the simplicity of it. I like that you can force syncing with scroll to refresh. But there are a few things I wish you'd consider. First, it always locks when you quit. Maybe add a lock timer like Proton Pass? And second, it doesn't support any locking methods other than Biometric (like PIN or pattern). And finally, it may be a good idea to hide the Proton account in settings with asterisks (*) and only show a few of the first and last letters.
★★★★★Sonya Harris· Jul 5, 2026
Exactly what I wanted, a free authenticator app that works! I've never had any problem with any of Protons services, and have been a paid user of one of their other services for many years now. Thank you to the Proton team.
★☆☆☆☆Leonardo García (Leo)· Jun 3, 2026
The UI looks bad. I wanted to switch from Stratum since I'm an Unlimited subscriber, but I wasn't expecting that. Then on import, there's no feedback to let you know it's importing, so I ended up importing twice before it told me it had imported. Then I decided to log in with my account, and now I have several copies of the same codes. The login process is also annoying since it won't work seamlessly with Proton Pass (email then password, instead of both together). Not sure why they bothered.
★★☆☆☆Dan Jacko (Jako)· Jun 30, 2026
Had to factory reset my device. All Authenticator codes I had were deleted. Now struggling to access any of my accounts. I didn't have a chance to back up, but I figured a paid app like this would save them. Very disappointed, at least google Authenticator saves them. This is enough for me to move back away from Proton. Can't even access my email.
★☆☆☆☆Asmodeus· May 21, 2026
Very bad auth app keeps locking me out of my accounts the codes are not working
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