Proton Authenticator
Proton Authenticator is a 2FA app from Proton that supports TOTP and passwordless authentication. It works with Proton accounts and other services supporting standard 2FA.
Features
- TOTP for two-factor authentication
- Passwordless/passkeys support
- Cross-device sync through Proton (optional)
- End-to-end encrypted
Links
- Proton Authenticator: https://proton.me/authenticator
- Proton Pass (related): https://proton.me/pass
Notes
2FA apps add a second factor beyond passwords. If using Proton services, Proton Authenticator integrates with your account. Alternatives like Authy, FreeOTP, or Aegis work with any service and may offer syncing or backup options depending on your threat model.