Proton Authenticator
Open-source two-factor app with end-to-end encrypted sync
- #2 of 10 in best authenticator apps
- Free
- Free to use
- Open source
- iOSAndroidmacOSWindowsLinux
Ranked 2 of 10 in best authenticator apps
Open-source app with end-to-end encrypted sync and backup across phones, tablets and desktops, plus an Apple Watch app. No browser extension is listed, and the company is Swiss-based.
Best for Encrypted sync across phones, tablets and desktops
About Proton Authenticator
Proton Authenticator generates one-time codes on phones, tablets, Apple Watch and desktops. The app supports biometric unlock, and you can search for codes and see the next code for an account. Codes sync and back up across devices, and the site describes the app as end-to-end encrypted.
Proton describes the app as open source, free to use and ad-free, and it says the company is Swiss-based. It is a standalone product, although the site also promotes Proton Pass for storing passwords alongside codes. No browser extension is listed on the product page.
Key features
- End-to-end encrypted sync and backup
- Biometric unlock
- Apple Watch app
- Desktop apps for macOS, Windows and Linux
- Standalone, no password manager needed
Strengths
- Free to use, with sync and backup of codes
- Apps for phones, tablets, Apple Watch and desktops
- Standalone app, with no password manager needed
Limits
- No browser extension is listed on the product page
Where Proton Authenticator ranks
How Proton Authenticator compares
| Product | Score | Price | Platforms | Backups and sync |
|---|---|---|---|---|
#1 Ente Auth | 91.5 | Free and open source | iOSAndroidWebmacOSLinuxWindows | End-to-end encrypted cloud backup |
| #2Proton Authenticator | 89.0 | Free | iOSAndroidmacOSWindowsLinux | End-to-end encrypted sync and backup |
#3 Yubico Authenticator | 88.0 | Free and open source | WindowsmacOSLinuxAndroidiOS | Codes live on the YubiKey; no cloud backup described |
#4 2FAS Auth | 87.5 | Free and open source | iOSAndroidBrowser extension | Cloud or manual backup |
#5 Aegis Authenticator | 86.0 | Free and open source | Android | Automatic backups, plus export and import |
The full comparison table for best authenticator apps has all 10 products.
Alternatives to Proton Authenticator
All 9 alternatives- Ente AuthAlso runs on Web.
- Yubico AuthenticatorFree app for managing one-time codes on a YubiKey
- 2FAS AuthLocal-first authenticator with no account and optional cloud backup
- Aegis AuthenticatorFree, open-source Android authenticator with an encrypted vault
StratumOpen-source Android authenticator with encrypted backups
Bitwarden AuthenticatorFree open-source two-factor app that needs no account
Questions about Proton Authenticator
- Is Proton Authenticator free?
- Proton Authenticator can be used without paying: Free to use and ad-free, according to its site. Check the vendor’s pricing page for current limits.
- Is Proton Authenticator open source?
- Yes. Proton Authenticator publishes its source code.
- Which platforms does Proton Authenticator support?
- Proton Authenticator is available on: iOS, Android, macOS, Windows, Linux.
- What is Proton Authenticator best for?
- Encrypted sync across phones, tablets and desktops. In our ranking of authenticator apps it is number 2 of 10 with a score of 89.0.
- What are the best alternatives to Proton Authenticator?
- The highest-ranked alternatives on listme.name are Ente Auth, Yubico Authenticator, 2FAS Auth, Aegis Authenticator.
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<a href="https://listme.name/software/proton-authenticator"><img src="https://listme.name/badge/proton-authenticator.svg" height="28" alt="Ranked #2 of 10 authenticator apps on listme.name"></a>Articles that mention Proton Authenticator
All articles- Guides · 5 min readHow to choose an authenticator app: backups, sync and open sourceChoose an authenticator app by how it backs up codes, whether sync is end-to-end encrypted, its license and platform reach. Compare Ente Auth, Aegis and Authy.
- Explainers · 6 min readWhat is a passkey? How it replaces your passwordA passkey replaces a password with a key pair held on your device. Learn how passkeys resist phishing, sync between devices and recover if you lose one.
