Proton introduced its very first two-factor authentication app on Thursday. Now available across Android, iOS, Windows, macOS, and Linux, Proton Authenticator is an open-source alternative to mainstream authenticator services that lack key security features and user control options.

Proton Authenticator works on desktop and mobile, syncs securely, and gives you full control with no creepy data collection required

Proton Authenticator is a new 2FA app with encrypted sync, offline support, and no lock-in — all completely free and open source.