Mailpile is a webmail client with encryption and privacy features built-in. Mailpile is free and open-source software.
License: Open Source
Mailpile is a privacy-focused, open-source email client that excels in user-friendliness and email encryption support, but lacks some advanced features and customization options. In contrast, Autistici / Inventati is a privacy-centric email service that supports custom domains and offers strong anonymity features, but it has a less intuitive interface and is not open-source.