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KOrganizer vs Evolution: catalog facts
KOrganizer	Evolution
Free Free and open source from the KDE community.	Free Free and open source, part of the GNOME project.
Linux	Linux
Works with Nextcloud, Kolab, Google Calendar and CalDAV servers Integrated to-dos alongside the agenda view	Mail, calendar, contacts and tasks in one program Exchange Web Services plugin connects to Microsoft 365
Best suited to the KDE Plasma desktop Depends on the Kontact/Akonadi stack	Linux only Heavier than a mail-only client, and slower to start
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0-or-later and LGPL-2.1-or-later
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 September 21, 2026

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