Zimbra Collaboration Suite Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra... Freemium Linux Web ActiveSync Real time collaboration Add a feature 27 Like
SOGo SOGo is groupware server with a focus on scalability and open standards. SOGo provides a rich AJAX-based Web interface and supports multiple native clients through... Free Open Source Linux Web Thunderbird Cloudron CalDAV CardDAV Add a feature 26 Like
Microsoft Exchange Server Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. It is part of the Microsoft Servers line of server products and is... Commercial Windows Web Real time collaboration Add a feature 15 Like
OBM OBM is a free messaging and collaboration platform useful for just a couple to many thousands of users with strong support for mobile devices. Free Open Source Mac OS X Windows Linux CalDAV Real time collaboration Add a feature 3 Like
iMail Fast, safe, heavy mail solution. Web-client access, LAN or WAN self-hosted server, maintenance-free design. No Windows server and database server required, unlimited... Free Windows Self-Hosted No features added Add a feature 2 Like
Expanding Communication Turnkey Solutions for the Enterprise Cloud Installation, Configuration, and Management tools for enterprise email, collaboration, messaging, video conferencing, file... Commercial Linux CalDAV Add a feature 5 Like
SophiMail SophiMail is a fully-featured email and collaboration server solving the most critical email issues: maximizes Privacy, Portability and Cost efficiency, Admin & User... Free BSD VirtualBox Self-Hosted VMware vSphere Hypervisor Daily Backup Indexed search CalDAV CardDAV ... Data portability Privacy focused Private messaging Schedule Backup Security focused Selective folder sharing Shared folders Team Collaboration Two factor authentication Unlimited users Add a feature 6 Like
Xeams Xeams is a secure and powerful mail server for that includes a powerful spam filtering engine that eliminates up to 99% of junk email right out of the box. The software... Free Personal $ $ $ Mac Windows Linux BSD No features added Add a feature 1 Like
Netrepid Hosted Exchange Services Hosted Exchange solutions from Netrepid - the best hosted exchange provider. Accelerate your technology at on demand speed. Commercial Web No features added Add a feature 1 Like
