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Zimbramailbox.org
Paid

Sold in several editions under Zimbra's license terms; see the edition comparison.

 Paid

Subscription email and workspace service that can be tried before committing.

Web, Self-hosted Web
  • Mail, calendar and contacts in one web client
  • Can be run on your own servers
  • Email, storage, meetings and office tools in one account
  • Data hosted in Germany under GDPR
  • Aimed at organisations rather than individuals
  • Running a mail server takes administration effort
  • A hosted service, not software you run yourself
  • Requires a paid subscription after the trial
Self-hosted, Hosted service Hosted service
Closed source Closed source
License not stated License not stated
Not stated if an account is needed Account needed
Not stated if it works offline Needs internet

Checked October 1, 2026

Checked September 23, 2026

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