Compare software

KOrganizer vs Chiri: catalog facts
KOrganizer	Chiri
Free Free and open source from the KDE community.	Free Free and open source under the zlib licence.
Linux	Windows, macOS, Linux
Works with Nextcloud, Kolab, Google Calendar and CalDAV servers Integrated to-dos alongside the agenda view	Uses the open CalDAV standard instead of a proprietary sync service Cross-platform desktop app
Best suited to the KDE Plasma desktop Depends on the Kontact/Akonadi stack	Needs a CalDAV server to sync tasks Young project with a small user base
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: Zlib
No account needed	Not stated if an account is needed
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 October 2, 2026

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