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Proton Authenticator

Name: Proton Authenticator
Author: Proton

Proton · Part of Proton apps

Private, secure, offline 2FA across devices by Proton team

Security & privacy
FOSS
Free
No ads

iOS
Android
Windows
macOS
Linux

Get Proton Authenticator

Download on the App Store Get it on Google Play

Get it with Aurora Store Get it on F-Droid Get it on Zapstore

What are these stores? App Store, Google Play, Aurora Store, F-Droid, Zapstore

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.

Developer: Proton
Website: proton.me/authenticator/download
Source code: github.com/protonpass/android-authenticator
Added to AppCosmos: 9 October 2026
License: GPL-3.0-or-later