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.

These one-time codes can be used instead of SMS-based verification and are meant to provide an extra layer of security during account sign-ins.Proton Authenticator doesn't rely on ads, trackers, or cloud services controlled by larger tech companies,