Proton Authenticator & 2FA

Proton AG

About this app

Proton Authenticator is a free, private 2FA authenticator app that generates secure one-time passwords (OTP) on all your devices, even offline. Add multi-factor authentication (MFA) to your online accounts in seconds. From the creators of Proton Mail, Proton VPN, Proton Drive, and Proton Pass.

Open-source, end-to-end encrypted, and protected by Swiss privacy laws, Proton Authenticator is the safest way to generate and store your 2FA codes and TOTP tokens.

WHY CHOOSE PROTON AUTHENTICATOR?

Free authenticator app: no Proton account required, no ads

Works offline: generate OTP codes on mobile and desktop without a connection

Encrypted sync: keep your 2FA codes on all your devices with end-to-end encryption

Automatic backups: never lose access to your MFA-protected accounts

Easy import and export: move your OTP tokens from other 2FA apps in a few taps, or export them anytime

App lock: secure your authenticator app with biometrics or a PIN code

Open source: transparent, verifiable code

Swiss privacy: protected by Switzerland's privacy laws

Trusted by millions. Built by Proton.

Secure every login with a private 2FA authenticator app. Download Proton Authenticator today.

Ratings and reviews

I used various apps before this one. Google Authenticator, Bitwarden, Stratum Authenticator, Synology Secure SignIn... None of these had the feature I didn't even know I wanted: showing the upcoming OTP! This is amazing! The number of times I had to wait because the code was about to change in 10 seconds and I estimated I would not be able to enter the code before it changed... those days are over! Seeing the next code that is about to come is the best feature I didn't even realize I wanted!

I've been seeing an issue from the very beginning of this app. Every code card bubble has a background that moves when you swipe left or right. For whatever reason this bubble background layer is generating slowly so I can see the yellow(left side) and red(right side) underlayer and the schooling feels junky. This always happens for me. I have tried to see if scrolling through the middle of the app causes this issue and yeah it's still occurring.

sync between devices, ok already logged in but makes you log in again. While logging in, inset your Authenticator code, but im in the app trying to log in to sync, so I cant get the code??? another issue, turned of biometrics on a device, now i cant use this App at all. not even with a password.

What’s new

- Target Android 16