Alternatives to Kolab Community for all platforms with any license





Web / Online



Indie / Classic

Other Platforms

  • Google Calendar icon

    Google Calendar

    With Google Calendar, its easy to keep track of all your lifes important events in one place. You can add events and send invitations...

    Free Web / Cloud Android iPhone Chrome OS Android Tablet iPad ... Sunbird Chrome

  • Zimbra Collaboration Suite icon

    Zimbra Collaboration Suite

    Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web...

    Freemium Linux Web / Cloud

  • 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

  • Dials icon


    Dials' unique clock-based view of your day is easier and faster to view than the standard “list view” format other mobile...

    Free iPhone

  • 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

  • CalenGoo icon


    CalenGoo gives you a fast and easy way to access and change your Google Calendar (or Google Apps Calendar) with your Android device....

    Commercial Android iPhone Android Tablet iPad Android Wear

  • 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

  • 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

  • Zoho Calendar icon

    Zoho Calendar

    Zoho Calendar is a free online calendar application that helps you to track your appointments and meeting schedule, send invitation...

    Free Web / Cloud

  • 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

  • DigiCal icon


    BEAUTIFULLY DESIGNED DigiCal’s diary planner and organizer provides a clear and beautiful overview for your events and appointments. ...

    Free Android Android Tablet

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  • 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

  • KeepTime icon


    A free, smart calendar with wait time reports. Wait less, do more. KeepTime is your personal, smart calendar that helps you outsmart...

    Free Web / Cloud Android

  • Remind icon


    A sophisticated calendar and alarm program. It includes the following features: A sophisticated scripting language and intelligent...

    Open Source Linux

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