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b1gMailMailEnable
Free

Free and open source under the GPL-2.0 licence.

 Freemium

A free Standard edition, with paid Professional, Enterprise and Premium editions and…

Web, Self-hosted Windows, Self-hosted
  • Runs on shared web hosting with PHP and MariaDB
  • Web admin panel for managing users and the service
  • Webmail, IMAP and Exchange ActiveSync for mobile devices
  • CalDAV and CardDAV for calendars and contacts
  • Shared-hosting mode relies on POP3 catch-all mailboxes
  • Community site and documentation are partly in transition from the old website
  • Windows servers only
  • Collaboration features are in the paid editions
Self-hosted Downloadable app, Self-hosted
Open source Closed source
License: GPL-2.0 License not stated
Not stated if an account is 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 October 1, 2026

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