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Afterlogic WebMail Lite PHPHorde Groupware
Free

Free and open source for personal and commercial use.

 Free

Free and open source with no paid tier.

Web, Self-hosted Web, Self-hosted
  • Works with any existing IMAP server, Plesk or cPanel
  • Plugin framework and API for extending it
  • Full groupware suite beyond mail, including tasks, notes and time tracking
  • CalDAV, CardDAV and ActiveSync sync
  • Requires your own web server and IMAP server
  • Office document preview depends on Microsoft's online viewer
  • Requires running and maintaining a PHP server
  • Older codebase with a long history of security fixes to track
Self-hosted Self-hosted
Open source Open source
License not stated License: LGPL/GPL
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 2, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.