What makes a secure authenticator app?
End-to-end encrypted sync
Open-source code
Biometric app lock
Multiple backup options
Zero data collection
Private by design and built for control
Two-factor authentication (2FA) is one of the best ways to protect your online security and privacy. Developed by the same team behind Proton Mail, Proton Authenticator is a simple, secure authenticator app that gives you full privacy, transparency, and choice.
Open source and transparent
Proton Authenticator is fully open source. So you don’t have to trust that it’s the most secure authenticator app available — anyone can inspect the code and verify it.
End-to-end encrypted sync
Access your 2FA codes on any device. They're secured with Proton's rigorous end-to-end encryption, giving you peace of mind that they're private — not even Proton can see them.
Proton Authenticator puts you in control
Choose a 2FA authenticator that's privacy-focused, fully encrypted, and free. Plus, Proton Authenticator works across devices.
“I want a free alternative to Big Tech authenticator apps that I can trust.”
Proton Authenticator is built for privacy, not to lock you into a platform based on targeted advertising. Our only mission is to protect your data.
"I love Proton Pass, but I want a separate app for my 2FA codes"
While Proton Pass offers a built-in 2FA authenticator, using a separate secure authenticator app provides an extra layer of defense against sophisticated attacks.
I want to back up my 2FA codes
Download Proton Authenticator for any device and sync your codes seamlessly with end-to-end encryption by using your Proton Account. This feature is optional.
Security features for every need
Back up codes safely
Turn on automatic backups on your mobile device to ensure you never lose access to your online accounts.
Sync with peace of mind
If you have a Proton Account, get Proton Authenticator on any device and sync your codes with end-to-end encryption to access them anywhere — even on desktop.
Lock your app
Use biometrics or a PIN to lock your app as an extra layer of security. You can set the amount of time before the app locks automatically.
Import and export securely
Your codes are yours. That’s why it’s easy to import tokens from another 2FA app or export them anytime you want.
Own your data
Avoid companies that spy on you and abuse your data. Proton doesn’t monitor you, and anyone can use Proton Authenticator without an account.
Trust through transparency
All Proton apps are open source, so anyone can verify our code is safe from vulnerabilities and does exactly what we claim.
Secure your accounts with Proton Pass
Create strong, unique passwords, store them with end-to-end encryption, and autofill with one click. Protect your logins and more with Proton Pass and get access to the whole Proton ecosystem.
Take control of your security.
Protect your accounts with the most secure authenticator app. Keep your 2FA codes private, encrypted, and always under your control
