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

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