Proton Pass is described as 'A password manager that ensures identity and password security with rigorous, end-to-end encryption, built by scientists from CERN, and recommended by the United Nations' and is a very popular password manager in the security & privacy category. There are more than 50 alternatives to Proton Pass for a variety of platforms, including Android, Mac, Windows, iPhone and Web-based apps. The best Proton Pass alternative is Bitwarden, which is both free and Open Source. Other great apps like Proton Pass are KeePassXC, KeePass, LastPass and 1Password.