Kolab Alternatives

Kolab is described as 'Provides a FOSS communication & collaboration solution that can be completely self-hosted. Take back control of your data and access it via the webinterface, or existing mobile & desktop clients' and is a Calendar app in the office & productivity category. There are more than 50 alternatives to Kolab for a variety of platforms, including Web-based, Linux, Android, Windows and Self-Hosted apps. The best Kolab alternative is Microsoft 365 Copilot, which is free. Other great apps like Kolab are Google Calendar, Fossify Calendar, Roundcube and Google Workspace.

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Kolab alternatives page was last updated

Alternatives list

  1. OurCal icon
     5 likes

    This app is tailored for families, couples, friends, and groups, providing end-to-end encryption for secure data, seamless calendar creation, syncing, private chats, and widgets for easy access, ensuring you never miss an event.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Android
    • iPhone
     
  2. Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.

    46 Zimbra Collaboration Suite alternatives

    Cost / License

    • Paid
    • Proprietary

    Application types

    Platforms

    • Linux
    • Online
    • Self-Hosted
     
  3. Kopano icon
     32 likes

    Kopano puts an email, video meetings, calendaring, and file sharing solution within one single interface.

    Cost / License

    • Paid
    • Proprietary

    Application types

    Platforms

    • Online
    • Software as a Service (SaaS)
     
  4. grommunio icon
     3 likes

    grommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration.

    15 grommunio alternatives

    Cost / License

    • Freemium
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • iPad
    • Self-Hosted
     
  5. OX App Suite icon
     16 likes

    The OX App Suite by Open-Xchange is web-based platform offering a suite of apps like an email client, calendar, contacts magement, cloud storage with synchronization and productivity apps for word processing, spreadsheets and presentations.

    20 OX App Suite alternatives

    Cost / License

    • Free
    • Open Source

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • Software as a Service (SaaS)
     
  6. IceWarp icon
     11 likes

    IceWarp integrates all communication & collaboration features in one unified solution. Available in cloud or for on-premises deployment, IceWarp is a great tool to share and exchange all information and ideas online, offline or via mobile devices.

    Cost / License

    • Paid
    • Proprietary

    Platforms

    • Windows
    • Linux
    • Online
     
  7.  8 likes

    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 platform for the Internet, the Citadel/UX developers added functionality such as shared calendars, instant...

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Linux
    • Online
     
  8. OBM icon
     4 likes

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

    Cost / License

    • Free
    • Open Source

    Alerts

    • Discontinued

    Platforms

    • Linux
     
  9. EGroupware icon
     9 likes

    Web-based team collaboration suite combining email client, calendar, contact and task tools, CRM, project and file management, file sharing, trouble tickets, Rocket.Chat chat, and Collabora online editing. Offers open source, self-hosted, and SaaS options.

    Cost / License

    Application types

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • Software as a Service (SaaS)
     
  10. CrossBox icon
     1 like

    Real-time email, chat, audio/video calls & conferences, file-sharing, and contacts app with a modern and intuitive UI.

    Cost / License

    • Paid
    • Proprietary

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
     
  11. Nexmail icon
     3 likes

    NexMail is an open-source, modern webmail client designed for self-hosted email servers. Enjoy a clean, intuitive interface with powerful features for managing your emails efficiently.

    27 Nexmail alternatives

    Cost / License

    Platforms

    • Self-Hosted
    • PHP
     
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