The Best 33 Kolab Community Alternatives

  • Zoho icon

    Zoho

    Zoho is an all-in-one online office suite. Zoho geares itself towards businesses, increasing your productivity and offering easy, real-time collaboration.

    Free Personal Web

  • G Suite icon

    G Suite

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

    Commercial Mac OS X Windows Linux Chrome OS Web

  • 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

  • CalenGoo

    calengoo gives you a fast and easy way to access and change your google calendar (or google apps calendar) with your android device. it can either work with the built-in calendar or it can sync directly with google.

    Commercial Android iPhone Android Tablet iPad Android Wear

  • Contactoffice

    Virtual Office, Online Office, Digital Learning Space, Online Groupware - ContactOffice, Keep a virtual office on the web. Share documents, contacts, calendar, tasks, ... with clients, students, suppliers, friends or family.

    Freemium 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

  • DigiCal

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

    Free Android Android Tablet

  • WikiSuite

    The most comprehensive and integrated Free / Libre / Open Source software suite ever developed.

    Free Open Source Linux Self-Hosted

  • 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