GPGMail is an extension for Apple Mail that provides public key email encryption and signing. Developed by GPGTools
License: Open Source
GPGMail is a PGP encryption plugin for Apple Mail, primarily focusing on macOS and iOS users, while Tutanota is a privacy-focused email service that offers end-to-end encryption across all platforms. Tutanota provides a more user-friendly experience for those looking for secure email without the need for technical setup.