Software Alternatives, Accelerators & Startups

Kolab Now

Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day...

Some of the top features or benefits of Kolab Now are: Privacy-focused, Open Source, Comprehensive Features, No Ads, and Cross-platform Support. You can visit the info page to learn more.

Best Kolab Now Alternatives & Competitors in 2025

The best Kolab Now alternatives based on verified products, community votes, reviews and other factors.
Filter: 12 Open-Source Alternatives. Latest update:

  1. 26

    Secure email with absolutely no compromises. Get your free encrypted email account today.

    freemium €5.0 / Monthly (user - 5 GB)

    /protonmail-alternatives
  2. 19

    Get your encrypted mailbox for free.

    Open Source

    /tutanota-alternatives
  3. Smartsheet is an intuitive online project management tool enabling teams to increase productivity using cloud, collaboration, & mobile technologies.

    Visit website

    Visit website
  4. 15

    Google's encompassing suite of cloud-based business apps.

    /google-workspace-alternatives
  5. 18

    mailbox.org offers a secure e-mail account for home and business use. The domain name, me@mailbox.

    /mailbox-org-alternatives
  6. 15

    Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.

    /zimbra-alternatives
  7. 12

    Easy to use end-to-end encrypted email. Secure and private email.

    freemium €2.5 / Monthly (Entry, 5GB emails,10 aliases,)

    /mailfence-alternatives
  8. 17

    Security extension to Mozilla Thunderbird and SeaMonkey

    /enigmail-alternatives
  9. 14

    Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.

    /kolab-community-alternatives
  10. Riseup provides online communication tools for people and groups working on liberatory social change. We are a project to create democratic alternatives and practice self-determination by controlling our own secure means of communications.

    /riseup-alternatives
  11. Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.

    Open Source

    /mailpile-alternatives
  12. An open source mailserver suite.

    Open Source

    /mailcow-alternatives
  13. On-premises, enterprise collaboration solution for documents, emails, calendars and more.

    /nextcloud-hub-alternatives
  14. Web-based IMAP email client

    Open Source

    /roundcube-alternatives
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