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 Google Calendar, which is free. Other great apps like Kolab are Microsoft 365 Copilot, Fossify Calendar, Google Workspace and Roundcube.

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Alternatives list

  1. Google Calendar icon

    Google Calendar

     945 likes
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    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.

    155 Google Calendar alternatives

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Sunbird
    • Google Chrome
    Google Calendar screenshot 1
     

    • Google Calendar is the most popular Web-based, Android, iPhone & iPad alternative to Kolab.

    • Google Calendar is the most popular free alternative to Kolab.

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

    Microsoft 365 Copilot

     854 likes
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    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 Windows & Mac alternative to Kolab.

    • Microsoft 365 Copilot is Freemium and ProprietaryKolab is Freemium and Open Source
  4. Fossify Calendar icon

    Fossify Calendar

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

    50 Fossify Calendar alternatives

    Cost / License

    • Free
    • Open Source

    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
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    Google Calendar icon
    Google Calendar

    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, ...

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

    Google Workspace

     145 likes
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    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.

    52 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
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    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

    • Free
    • Open Source

    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. Simple Calendar icon

    Simple Calendar

     51 likes
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    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

    Application type

    Alerts

    • Warning

    Platforms

    • Android
    • Android Tablet
    Simple Calendar screenshot 1
     
  10. Nextcloud Hub icon

    Nextcloud Hub

     22 likes
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    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
     
  11. Right Calendar icon

    Right Calendar

     9 likes
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    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...

    51 Right Calendar alternatives

    Cost / License

    • Free Personal
    • Open Source

    Application type

    Platforms

    • Android
    Right Calendar screenshot 1
    Right Calendar screenshot 2
    Right Calendar screenshot 3
     
  12. Mailo icon

    Mailo

     25 likes
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    The mail service which respects you.

    Cost / License

    • Freemium (Subscription)
    • Proprietary

    Application types

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • OpenPGP
    Mobile
     
  13. Infomaniak kSuite icon

    Infomaniak kSuite

     8 likes
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    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.

    77 Infomaniak kSuite alternatives

    Cost / License

    • Free Personal
    • Proprietary

    Application types

    Platforms

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

    OurCal

     5 likes
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    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 (Subscription)
    • Proprietary

    Application type

    Platforms

    • Android
    • iPhone
    OurCal screenshot 1
    OurCal screenshot 2
    OurCal screenshot 3
     
  15. Microsoft Exchange icon

    Microsoft Exchange

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

    43 Microsoft Exchange alternatives

    Cost / License

    • Subscription
    • Proprietary

    Application type

    Platforms

    • Windows
    • Online
    • Self-Hosted
    • Microsoft Office 365
    Microsoft Exchange screenshot 1
     
12 of 47 Kolab alternatives