Proton Authenticator

Proton Authenticator is a privacy-first two-factor authentication app for fast, secure MFA. Generate TOTP 2FA codes for your favorite accounts with one tap, scan QR codes in seconds, and keep everything protected with end-to-end encrypted backup and sync via your Proton account. Designed for security and productivity, it offers offline access, biometric lock, and a clean, ad-free experience. Ideal for anyone who needs a reliable 2FA app for stronger account security across email, social media, developer tools, and more. Keywords include 2FA app, MFA, TOTP, authenticator, security, encrypted backup, productivity.