Airmail is a fast mail client for Mac and iPhone.

Claws Mail is a free and open-source, GTK+-based email and news client. It offers easy configuration and an abundance of features.

FastMail is an email service offering paid email accounts for individuals and organizations.

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

Kontact is a personal information manager and groupware software suite developed by KDE. It supports calendars, contacts, notes, to-do lists, news, and email.

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

Apple Mail is an email client included with the operating systems macOS, iOS and watchOS by Apple Inc.

Evolution is the official personal information manager for GNOME.

Geary is an email application built around conversations, for the GNOME 3 desktop. It allows you to read, find and send email.

iRedMail is a free, OpenSource mail server.

Microsoft Mail and Calendar apps help you stay up to date on your email, manage your schedule and stay in touch with people you care about the most.

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…