Proton Authenticator

Proton Authenticator is ranked #3 of 113 in authenticator apps on Freedom251, made by Proton Authenticator (Plan-les-Ouates, Geneva, Switzerland). It runs on Android, iOS, Linux, macOS, Windows. There is a free plan.

Proton Authenticator plans and pricing

All plans

Free Free No ads · No tracking · Available on all platforms proton.me · 21 Sept 2026

Proton Authenticator Free Completely free on all platforms · no ads · no tracking proton.me · 4 Oct 2026

Compared on authenticator apps

Free plan: Yes
Code type: totp
Encrypted backup: Yes
Multi-device sync: Yes
Supported platforms: iOS, Android, macOS, Windows, Linux

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Proton Authenticator

Purpose: Proton Authenticator generates time-based, one-time 2FA codes on your device for an extra layer of account login security.
Account requirement: You can use the app without a Proton Account; signing in is optional for syncing codes across devices.
Offline use: The app can display your 2FA codes without an internet connection.
Code import: It supports importing codes from Google Authenticator, 2FAS, Aegis Authenticator, Bitwarden Authenticator, Ente Auth, and LastPass Authenticator.
Code export: You can export your codes from Proton Authenticator.
Backup and sync: You can back up codes locally or in the cloud and sync them across devices with end-to-end encryption.
Security: Proton says that synced data is end-to-end encrypted and that its servers never access the unencrypted data.
Encryption detail: When sync is enabled, entries are encrypted using 256-bit AES-GCM.
Open source: Proton Authenticator is open source, and Proton says anyone can inspect its code.
Biometric unlock: The app supports unlocking its vault with face or fingerprint recognition.
App availability: Proton lists apps for Windows, macOS, Linux, iOS, and Android, with its Android app also available on F-Droid.
Support: The product page links to Proton product support.
Maker: Proton AG operates Proton services as a Swiss corporation and says Proton was launched in 2014.
Founded: 2014
Price from: Free

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Where it ranks on Freedom251

Best Authenticator Apps in 2026#3 of 113

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Sources

proton.me/blog/authenticator-security-model· checked 4 Oct 2026
proton.me/authenticator· checked 4 Oct 2026
proton.me/authenticator/download· checked 4 Oct 2026
proton.me/about· checked 4 Oct 2026
proton.me/support/authenticator· checked 21 Sept 2026