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tine Groupware vs Horde Groupware: catalog facts
tine Groupware	Horde Groupware
Free Open-source software; the research does not detail any paid offerings.	Free Free and open source with no paid tier.
Web, Self-hosted	Web, Self-hosted
Email, calendar, contacts and tasks in one platform Resource planning for shared appointments	Full groupware suite beyond mail, including tasks, notes and time tracking CalDAV, CardDAV and ActiveSync sync
Website and documentation mostly in German Aimed at organisations rather than individual users	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
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
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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