Alternatives to Kolab Community for Self-hosting with any license

  • Roundcube

    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...

    Free Open Source Self-Hosted PHP Cloudron

    Roundcube icon
  • 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...

    Free Windows Self-Hosted

    No features added Add a feature

    iMail icon
  • wtplan

    wtplan is a calendar program with a terminal interface, a web interface and git integration.

    Free Open Source Mac OS X Windows Linux Self-Hosted

Platforms

Desktop

Web / Online

Show 18 less popular platforms