KOrganizer
KOrganizer is Kontact’s calendar and scheduling component for Linux.
What KOrganizer is
KOrganizer is Kontact’s calendar and scheduling component for Linux. It manages events, appointments, tasks and journal entries across multiple calendars and to-do lists, with reminders, alarm notifications, quick entries, attachments, printing, undo and redo. Users can invite people by email, process responses, and share calendars through a groupware server or network file. Group scheduling, web export and network-transparent calendar handling are supported. KOrganizer works with NextCloud, Kolab and Google Calendar, and stores or exchanges data using vCalendar and iCalendar. Tags can group events and to-dos, colors can highlight tags, and drag-and-drop can reschedule events. Integration with Kontact and KDE PIM includes KAddressBook birthdays and KMail invitations. KDE describes open standards, privacy, offline access and user data control for Kontact. KOrganizer is GPL-2.0+, free, and installable through Discover, AppStream stores or a distribution package manager.
Good
- Free GPL-2.0+ Linux application
- Supports multiple calendars and to-do lists
- Works with NextCloud, Kolab and Google Calendar
- Email invitations and response handling
- Offline access and open standards
Watch out
- Linux platform only
- No free trial is offered
- Requires Kontact or KDE PIM for some integrations
Who it suits
KOrganizer suits Linux users who need personal scheduling, shared calendars, tasks and reminders. It is also useful for people working within Kontact and KDE PIM.
Verdict
KOrganizer provides broad calendar, task and collaboration functions within the KDE ecosystem. Its service support, sharing tools and open formats make it suitable for Linux-based personal and group scheduling.
Plans and prices
From KOrganizer's own pricing page, checked 12 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| KOrganizer | Free | No paid plans stated |
The facts
Each one read from KOrganizer's own pages, with the date it was checked.
What it does
- Calendar formats
- It supports vCalendar and iCalendar for storing and exchanging calendar data.checked 12 Oct 2026
- Calendar services
- It works with calendaring services including NextCloud, Kolab, and Google Calendar.checked 12 Oct 2026
- Calendar sync
- two_waychecked 20 Sep 2026
- Collaboration
- Users can invite people with email addresses to events, process responses, and share calendars through a groupware server or a network file.checked 12 Oct 2026
- Customization
- Users can group events and to-dos with tags, highlight tags with colors, reschedule events by drag-and-drop, and customize icon sets.checked 12 Oct 2026
- Download
- The product page lists Linux and says installation is available through Discover, other AppStream application stores, or a distribution package manager.checked 12 Oct 2026
- Kontact integration
- KOrganizer integrates with Kontact and KDE PIM applications; the handbook gives showing KAddressBook birthdays and using KMail for invitations as examples.checked 12 Oct 2026
- License
- The product page lists KOrganizer under the GPL-2.0+ license.checked 12 Oct 2026
- Organizer features
- It supports multiple calendars and to-do lists, undo and redo, attachments, quick entries, and printing.checked 12 Oct 2026
- Personal information
- The handbook says users can schedule appointments and events, create to-dos, write journal entries, and receive reminders for pending tasks.checked 12 Oct 2026
- Privacy and data
- KDE says Kontact supports open standards, values privacy, gives users control over their data, and allows offline access.checked 12 Oct 2026
- Publisher
- KDE e.V. is a registered non-profit organization that represents the KDE Project in legal and financial matters and was registered in Germany in 1997.checked 12 Oct 2026
- Purpose
- KOrganizer is the calendar and scheduling component of Kontact for managing events and tasks.checked 12 Oct 2026
- Recent release
- The product page lists version 6.8.2 dated 2026-10-08 and describes CalDAV fixes in that release.checked 12 Oct 2026
- Scheduling
- It supports alarm notifications, group scheduling, web export, and network transparent handling of calendar data.checked 12 Oct 2026
- Shared calendars
- Yeschecked 20 Sep 2026
- Support
- The product page links to the KOrganizer handbook, KDE forum, kdepim-users mailing list, and #kontact on Libera.Chat for help.checked 12 Oct 2026
Money
- Free plan
- Yeschecked 20 Sep 2026
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