Rediffmail Enterprise

Business email. Professional email accounts.

CounterMail

Countermail is a web-based email service. It is hosted in Sweden. Its focus is on privacy.

Security extension to Mozilla Thunderbird and SeaMonkey

Email, calendars, and contacts to highest standards of security, privacy and reliability.

GMX Mail is a German-based free webmail service provided by GMX (Global Mail Exchange).

GPGMail is an open source plugin for Apple Mail.

Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.

Secure email for the world. Because everyone has the right to communicate privately.

Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.

Mailvelope open source project. OpenPGP in your browser.

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Web- and IMAP-based email service. 2GB cost 1€/month.

Secure email with absolutely no compromises. Get your free encrypted email account today.

RainLoop is a web based email client.

Web-based IMAP email client

SOGo is groupware server with a focus on scalability and open standards.

SecureGmail encrypts and decrypts emails you send in Gmail.

Get your encrypted mailbox for free.

Free email with privacy and security.

Web-mail with a terabyte of free storage space & spam protection. Yahoo!

Zoho Mail is a webmail service built with the needs of a modern business in mind.

A fully fledged, free email server solution, an open source project (GPL v2).