Compare software

MDaemon Email Serverdocker-mailserver
Paid

Commercial licence with renewals; a free 30-day trial is available.

 Free

Free and open source.

Windows, Self-hosted Linux, Self-hosted
  • Self-hosted alternative to Exchange and Microsoft 365
  • Webmail, groupware and anti-spam in one package
  • Whole mail stack in one container
  • Built-in antispam and antivirus
  • Runs on Windows only
  • Paid licence with renewal fees
  • No webmail or graphical admin interface
  • Needs Docker and DNS knowledge to run well
Downloadable app, Self-hosted Self-hosted
Closed source Open source
License not stated License not stated
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked October 2, 2026

Checked September 24, 2026

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