189 Like ONLYOFFICE Good alternative? YES NO ONLYOFFICE Desktop Editors is an open-source office suite that combines text, spreadsheet and presentation editors, distributed under AGPL license v3. Free Open Source Mac Windows Linux Web Self-Hosted Support for Docker Dropbox integration Gantt-charts Google Drive integration Compatible with Microsoft Office Multiple languages ... Real time collaboration Add a feature
34 Like Kolab Community Good alternative? YES NO Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite. Free Open Source Linux Web Self-Hosted CalDAV CardDAV Real time collaboration Support for WebDAV Add a feature
23 Like Horde Good alternative? YES NO Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts, tasks and notes with the standards... Free Open Source Web Self-Hosted CalDAV Add a feature
24 Like Zimbra Collaboration Suite Alternative? YES NO 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 Real time collaboration Add a feature
10 Like OX Open-Xchange Good alternative? YES NO Open-Xchange Server 6 is the most advanced Linux based Groupware solution f. Open-Xchange Server 6 is superior in the following areas: • Open-Xchange Server 6 offers... Free Open Source Linux Web Real time collaboration Support for WebDAV Add a feature
15 Like Microsoft Exchange Server Alternative? YES NO 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
4 Like Citadel Good alternative? YES NO Is a collaboration suite (messaging and groupware). It is designed to run on open source operating systems such as Linux or BSD. In order to modernize the Citadel... Free Open Source Linux Web Real time collaboration Add a feature
7 Like Kerio Connect Good alternative? YES NO Kerio Connect makes email, calendars, contacts and task management easy and affordable. With Kerio Connect, you have immediate, secure access to your communications... Commercial Mac Windows Linux Web Sync Contacts POP3 Support Add a feature
3 Like OBM Good alternative? YES NO 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 Windows Linux CalDAV Real time collaboration Add a feature
5 Like Expanding Communication Alternative? YES NO 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
1 Like iMail Good alternative? YES NO 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
