The Best 18 OX Open-Xchange Alternatives

  • 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 the use of standard protocols such as CalDAV, CardDAV and GroupDAV.

    Free Open Source Linux Web Cloudron Thunderbird

  • 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 widely used by enterprises using Microsoft infrastructure solutions.

    Commercial Windows Web

  • eGroupWare

    Egroupware is a web based software for team collaboration, central data management and CRM: email client, online calendar, contact and task management, project and file management, trouble ticket system, synchronization.

    Free Open Source Linux Web

  • Expanding Communication

    Turnkey Solutions for the Enterprise Cloud Installation, Configuration, and Management tools for enterprise email, collaboration, messaging, video conferencing, file sharing, and file transfers.

    Commercial Linux

  • Citadel

    Is a collaboration suite (messaging and groupware). It is designed to run on open source operating systems such as Linux or BSD.

    Free Open Source Linux Web

  • 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

  • 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 mail accounts, storage, attachment size, custom logo.

    Free Windows Self-Hosted

  • atmail

    Atmail allows you to choose between on-premises or cloud deployment. Features include email, contact, calendar, task, storage, synchronisation and provisioning. ...

    Commercial Mac OS X Windows Linux Android iPhone

  • Postaci

    Postaci (Turkish for Postman) is multiplatform Webmail software which is database independent, multilanguage, POP3/IMAP, and fully MIME-compatible. While using POP3 mode...

    Free Open Source Linux

  • AfterLogic Aurora

    Afterlogic Aurora is an enterprise collaboration system for small and medium-sized business. Aurora provides collaboration of webmail, contacts, calendar, files and...

    Commercial

  • DeskNow

    DeskNow is a fully featured and easy to use mail and collaboration server with build-in antivirus and antispam. SyncML for mobile devices is separately licensed.

    Commercial Windows Linux