Authenticator Apps
Apps that generate the one-time codes for two-step sign-in.
European alternatives
Aegis Authenticator
Authenticator Apps · Netherlands
Alternative to Google Authenticator
Open-source Android 2FA app with an encrypted vault and backups
Proton Authenticator
Authenticator Apps · Switzerland
Alternative to Google Authenticator
Free Swiss 2FA code app with end-to-end encrypted sync and desktop