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SOGo vs tine Groupware: catalog facts
SOGo	tine Groupware
Free Free and open source; paid premium support is offered separately.	Free Open-source software; the research does not detail any paid offerings.
Web, Self-hosted	Web, Self-hosted
Webmail, calendars and contacts in one self-hosted server CalDAV, CardDAV and ActiveSync support for native and mobile clients	Email, calendar, contacts and tasks in one platform Resource planning for shared appointments
Needs existing mail and directory servers to integrate with Outlook support depends on a separate CalDAV synchronizer	Website and documentation mostly in German Aimed at organisations rather than individual users
Self-hosted	Self-hosted
Open source	Open source
License: GPL-2.0-or-later / LGPL-2.0-or-later	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.