Proton Mail

Proton Mail is a secure email service with end-to-end encryption by default. Based in Switzerland, it benefits from strong privacy laws. Users can opt for custom domains, multiple addresses, and ephemeral “self-destruct” messages. The interface is browser-based or mobile, with a zero-access encryption model that even Proton can’t read. Proton Mail also supports encrypted contact forms for business websites. While advanced collaboration features are limited, Proton Mail’s focus on security and privacy suits individuals or organizations wanting near-unbreakable encryption for sensitive communications.