Proton launches free and open-source Authenticator app to take on Google and Microsoft

What just happened? Swiss technology company Proton has expanded its privacy-focused software lineup with the launch of Proton Authenticator, a free and open-source two-factor authentication app. Best known for its encrypted webmail service, Proton also offers a VPN, password manager, cloud storage, and an online document editor.

Proton Authenticator is positioned as a privacy-focused alternative to authentication apps from Google, Microsoft, Authy, and Duo. It replaces legacy SMS-based verification by generating unique login codes for two-factor authentication when signing into websites and online services.

The app features end-to-end encryption and is protected by strong Swiss privacy laws that align with the European Union's General Data Protection Regulation. According to Proton, the app does not collect or share any user data with third parties or law enforcement.

Proton claims its new authentication tool offers greater flexibility and stronger encryption than competing services. It allows users to import existing 2FA tokens ...