ProtonMail is an end-to-end encrypted email service.

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

Lavabit is an open-source encrypted webmail service.

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…

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

Tutanota is an open-source end-to-end encrypted email software and freemium hosted secure email service.

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

Hushmail is an encrypted proprietary web-based email service offering PGP-encrypted e-mail and vanity domain service.

Mailfence is a web-based email service that offers OpenPGP based end-to-end encryption and digital signatures.

GPGMail is an extension for Apple Mail that provides public key email encryption and signing.