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EvolutionMerkuro
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
  • Supports Nextcloud, Google Calendar, Outlook and CalDAV calendars
  • Combines events, tasks and contacts in one app
  • Linux only
  • Heavier than a mail-only client, and slower to start
  • Linux only
  • Fits best within the KDE Plasma desktop
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 Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 21, 2026

Checked October 1, 2026

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