Mailpile is a webmail client with encryption and privacy features built-in. Mailpile is free and open-source software.

Mailvelope is a free software for end-to-end encryption of email traffic inside of a web browser (Firefox or Chromium) that integrates itself into existing we…

Enigmail is a data encryption and decryption extension for Mozilla Thunderbird and the SeaMonkey internet suite that provides OpenPGP public key e-mail encryp…

MDaemon Messaging Server is an e-mail server software for Windows.