Alternatives to Zimbra Collaboration Suite for all platforms with any license

  • G Suite icon

    G Suite

    G Suite (formerly Google Apps for Work) is Google's encompassing selection of cloud apps for business, including customizable...

    Commercial Mac Windows Linux Web / Cloud Chrome OS

  • Kolab Community icon

    Kolab Community

    Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.

    Open Source Linux Web / Cloud Self-Hosted

  • Horde icon


    Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts, tasks...

    Open Source Web / Cloud

  • Kolab Now icon

    Kolab Now

    Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and...

    Commercial Web / Cloud DAVdroid

  • SOGo icon


    SOGo is groupware server with a focus on scalability and open standards. SOGo provides a rich AJAX-based Web interface and supports...

    Open Source Linux Web / Cloud Thunderbird

  • OX Open-Xchange icon

    OX Open-Xchange

    Open-Xchange Server 6 is the most advanced Linux based Groupware solution f. Open-Xchange Server 6 is superior in the following...

    Open Source Linux Web / Cloud

  • Microsoft Exchange Server icon

    Microsoft Exchange Server

    Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. It is part of the Microsoft...

    Commercial Windows Web / Cloud

  • Microsoft Office 365 icon

    Microsoft Office 365

    Office 365 is a subscription-based software services that licenses Microsoft Office products for on-premise or cloud-based use. For...

    Commercial Web / Cloud

  • mailcow icon


    mailcow is a mail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for...

    Open Source Linux

  • OpenChange icon


    OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols. Exchange is a...

    Open Source Linux

  • Atmail Email Server icon

    Atmail Email Server

    Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows. ...

    Commercial Linux Web / Cloud

  • Sendmail icon


    Sendmail is a general purpose internetwork email routing facility that supports many kinds of transfer and delivery methods, including...

    Open Source Mac Linux

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  • iRedMail icon


    A fully fledged, free email server solution, an open source project (GPL v2). Use official binary packages from Linux/BSD...

    Open Source Linux BSD Self-Hosted

  • Zarafa icon


    Open Source Collaboration, providing integration with your existing Linux mailserver, native mobile phone support, Outlook "Look...

    Commercial Mac Windows Linux Web / Cloud

  • icon

    Full featured solution for your Email server. Native implementation of last anti-SPAM metods, webmail and easy administration included.

    Free Personal Linux

  • Kerio Connect icon

    Kerio Connect

    Kerio Connect makes email, calendars, contacts and task management easy and affordable. With Kerio Connect, you have immediate, secure...

    Commercial Mac Windows Linux Web / Cloud

  • eGroupWare icon


    Egroupware is a web based software for team collaboration, central data management and CRM: email client, online calendar, contact and...

    Open Source Linux Web / Cloud

  • Blue-Mind icon


    Blue Mind is a complete solution of company messaging, calendars and collaborative work. It aims to enable you to work daily with...

    Open Source Linux

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  • atmail icon


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

    Commercial Mac Windows Linux Android iPhone Android Tablet ... iPad

  • PowerMTA icon


    Email gateway application (SMTP server) that makes it easy for senders to adopt the latest authentication specifications ( SPF and...

    Commercial Windows Linux Self-Hosted

  • OBM icon


    OBM is a free messaging and collaboration platform useful for just a couple to many thousands of users with strong support for mobile...

    Open Source Mac Windows Linux

  • Expanding Communication icon

    Expanding Communication

    Turnkey Solutions for the Enterprise Cloud Installation, Configuration, and Management tools for enterprise email, collaboration...

    Commercial Linux

  • Xeams icon


    Xeams is a secure & powerful mail server for Windows, Linux, Solaris, MacOSX and other flavors or UNIX, which supports SMTP, POP3...

    Free Mac Windows Linux BSD

  • Citadel

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

    Open Source Linux Web / Cloud

  • Axigen icon


    Axigen is an integrated email, calendaring & collaboration platform, built on a unique Linux mail server technology, for increased...

    Freemium Windows Linux BSD Self-Hosted Microsoft Office Outlook

  • Alinto

    Established in January 2000, Alinto is one othe principal french editors and operators of collaborative messaging and unified...

    Commercial Web / Cloud

  • HyperOffice Email Service icon

    HyperOffice Email Service

    HyperOffices is a Microsoft Exchange alternative with all the messaging features growing business need - custom business email;...

    Commercial Web / Cloud

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