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KOrganizer vs Orage: catalog facts
KOrganizer	Orage
Free Free and open source from the KDE community.	Free Free and open source as part of the Xfce project.
Linux	Linux
Works with Nextcloud, Kolab, Google Calendar and CalDAV servers Integrated to-dos alongside the agenda view	Light on resources Uses the standard iCal format with import and export
Best suited to the KDE Plasma desktop Depends on the Kontact/Akonadi stack	Single user only, no group calendars Linux desktop only
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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