Mailpile
Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.
22 Alternatives To Mailpile
Afterlogic Webmail
Webmail is an open-source webmail script for existing IMAP servers.
FastMail
Email, calendars, and contacts to highest standards of security, privacy and reliability.
GMX
GMX Mail is a German-based free webmail service provided by GMX (Global Mail Exchange).
Gmail
Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.
Horde
Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Mailbird
Mailbird is the best email client for Windows 7, 8 and 10
Mailspring
Mailspring is a mail client for Mac, Windows and Linux.
Mu4e
Starting with version 0.9.8, mu provides an emacs-based e-mail client which uses mu as its back-end: mu4e.
NeutronMail
Self-hosted server for the ProtonMail client.
Outlook
Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Posteo
Web- and IMAP-based email service. 2GB cost 1€/month.
ProtonMail
Secure email with absolutely no compromises. Get your free encrypted email account today.
Rainloop
RainLoop is a web based email client.
Roundcube
Web-based IMAP email client
SOGo
SOGo is groupware server with a focus on scalability and open standards.
Squirrelmail
SquirrelMail is a standards-based webmail package written in PHP.
Tutanota
Get your encrypted mailbox for free.
Zimbra Collaboration Suite
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more.
Zoho Mail
Zoho Mail is a webmail service built with the needs of a modern business in mind.
iRedMail
A fully fledged, free email server solution, an open source project (GPL v2).