ProtonMail
/ communicationProtonMail is the world’s most popular encrypted email service, protecting millions of users under the shield of strict Swiss privacy laws. Born at CERN, it brings rigorous security to a simple web interface. It allows you to create an account without any personal information, and its “Zero-Access” architecture implies that even Proton itself cannot decrypt or read your stored emails.
The service uses open-source PGP encryption behind the scenes, automatically encrypting messages between Proton users. For non-Proton recipients, you can send password-protected links that expire after a set time. It integrates seamlessly with the broader Proton ecosystem (VPN, Drive, Calendar) and offers a Tor onion address for users who need to bypass censorship or access the service anonymously.