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Evolution vs Calindori: catalog facts
Evolution	Calindori
Free Free and open source, part of the GNOME project.	Free Free and open source under the GPL-3.0 or later licence.
Linux	Linux
Mail, calendar, contacts and tasks in one program Exchange Web Services plugin connects to Microsoft 365	Stores calendars in the standard iCal format Handles both events and to-do items
Linux only Heavier than a mail-only client, and slower to start	Linux only Basic feature set compared with full desktop calendar suites
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later and LGPL-2.1-or-later	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 1, 2026

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