Kolab AlternativesCalendar Apps like Kolab

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 25 alternatives to Kolab for a variety of platforms, including Web-based, Linux, Android, Windows and iPhone apps. The best Kolab alternative is Microsoft 365 Copilot, which is free. Other great apps like Kolab are Google Calendar, Fossify Calendar, Google Workspace and Roundcube.

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Alternatives list

  1. Microsoft 365 Copilot icon

    Microsoft 365 Copilot

     855 likes

    Office suite offering productivity tools, document creation, and collaboration. Features AI-enhanced editing, mobile app access to documents and shared workspaces. Formats include word processing, spreadsheets, presentations, and email services.

    52 Microsoft 365 Copilot alternatives

    Cost / License

    • Freemium (Pay once or Subscription)
    • Proprietary

    Application types

    Platforms

    • Mac
    • Windows
    • Online
    • Android
    • iPhone
    • Android Tablet
    • HUAWEI AppGallery
    • iPad
    Microsoft 365 Copilot screenshot 1
     

    • Microsoft 365 Copilot is the most popular Web-based, Windows, Android & Mac alternative to Kolab.

    • Microsoft 365 Copilot is the most popular free alternative to Kolab.

    • Microsoft 365 Copilot is Freemium and ProprietaryKolab is Freemium and Open Source
  2. Google Calendar icon

    Google Calendar

     945 likes

    Manage events seamlessly with syncing across devices, automatic event creation from Gmail, shareable schedules, customizable reminders, and a user-friendly interface. Features include dark mode, integration with Google services, and support for recurring events and global time zones.

    161 Google Calendar alternatives

    Cost / License

    • Free Personal
    • Proprietary

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Sunbird
    • Google Chrome
    Google Calendar screenshot 1
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  4. Fossify Calendar icon

    Fossify Calendar

     52 likes

    Your privacy-aware, open-source calendar with intuitive design and multi-platform syncing.

    51 Fossify Calendar alternatives

    Cost / License

    Application type

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    Fossify Calendar screenshot 1
    Fossify Calendar screenshot 2
    Fossify Calendar screenshot 3
     

    • Fossify Calendar is the most popular Open Source alternative to Kolab.

    • Fossify Calendar is Free and Open SourceKolab is Freemium and Open Source
    • Fossify Calendar is Privacy focused, Customizable and LightweightKolab is not according to our users
  5. Ad
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    Google Workspace icon
    Google Workspace

    Google Workspace delivers a cloud-based suite combining Gmail, Calendar, Meet & Drive to enhance collaboration through tools like Docs and Sheets. Offers secure storage options, custom domain emails, and robust management cap...

    https://workspace.google.com
    Learn More
  6. Google Workspace icon

    Google Workspace

     146 likes

    Google Workspace delivers a cloud-based suite combining Gmail, Calendar, Meet & Drive to enhance collaboration through tools like Docs and Sheets. Offers secure storage options, custom domain emails, and robust management capabilities with 2FA and 24/7 support.

    56 Google Workspace alternatives

    Cost / License

    • Subscription
    • Proprietary

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Chrome OS
    Google Workspace screenshot 1
     

    • Google Workspace is the most popular Linux alternative to Kolab.

    • Google Workspace is the most popular commercial alternative to Kolab.

    • Google Workspace is Paid and ProprietaryKolab is Freemium and Open Source
  7. Roundcube icon

    Roundcube

     170 likes

    Roundcube webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client, including MIME support, address book, folder manipulation, message searching and spell checking.

    27 Roundcube alternatives

    Cost / License

    Application types

    Platforms

    • Self-Hosted
    • PHP
    • Cloudron
    • Nextcloud
    Roundcube screenshot 1
     

    • Roundcube is the most popular Self-Hosted alternative to Kolab.

    • Roundcube is Free and Open SourceKolab is Freemium and Open Source
  8. Nextcloud Hub icon

    Nextcloud Hub

     22 likes

    Nextcloud is the most deployed on-premises file share and collaboration platform. Access & collaborate across your devices. As fully on-premises solution, Nextcloud Hub provides the benefits of online collaboration without the compliance and security risks.

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Self-Hosted
    • Nextcloud
    Nextcloud Hub screenshot 1
     
  10. Simple Calendar icon

    Simple Calendar

     51 likes

    A simple calendar with optional CalDAV synchronization. You can easily create recurring events and setup reminders, it can also display week numbers.

    Cost / License

    • Freemium (Pay once)
    • Proprietary (GPL-3.0)

    Application type

    Alerts

    • Warning

    Platforms

    • Android
    • Android Tablet
    Simple Calendar screenshot 1
     
  11. Right Calendar icon

    Right Calendar

     9 likes

    Right Calendar app is a versatile scheduling tool that offers unparalleled flexibility to its users. One of its standout features is that it is built on an open-source platform. This not only ensures transparency but also allows for constant updates and bug fixes from a...

    52 Right Calendar alternatives

    Cost / License

    Application type

    Platforms

    • Android
    Right Calendar screenshot 1
    Right Calendar screenshot 2
    Right Calendar screenshot 3
     
  12. Infomaniak kSuite icon

    Infomaniak kSuite

     9 likes

    Suite for secure email, calendaring, file sharing, chat, and online meetings, offering real-time collaboration on docs, GDPR compliance, customizable branding, renewable energy use, advanced user management, and all data hosted in Switzerland.

    78 Infomaniak kSuite alternatives

    Cost / License

    • Free Personal
    • Proprietary

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    Infomaniak kSuite screenshot 1
     
  14. Microsoft Exchange icon

    Microsoft Exchange

     17 likes

    Exchange business-class email helps increase user productivity while protecting your data. Get it as a hosted service or run it on your servers.

    44 Microsoft Exchange alternatives

    Cost / License

    • Subscription
    • Proprietary

    Application type

    Platforms

    • Windows
    • Online
    • Self-Hosted
    • Microsoft Office 365
    Microsoft Exchange screenshot 1
     
  15. OurCal icon

    OurCal

     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.

    62 OurCal alternatives

    Cost / License

    • Freemium (Subscription)
    • Proprietary

    Application type

    Platforms

    • Android
    • iPhone
    OurCal screenshot 1
    OurCal screenshot 2
    OurCal screenshot 3
     
12 of 48 Kolab alternatives