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Head-to-head · Calendar Apps

Nextcloud Calendar vs KOrganizer

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Nextcloud Calendar #5 in Calendar Apps 8.9/10 Free plan Free plan✓ 3 of 4 features Visit Nextcloud
KOrganizer #8 in Calendar Apps 8.6/10 Free plan Free plan✓ 1 of 4 features Visit KDE

Nextcloud Calendar leads on 0 checks, KOrganizer on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreNextcloud Calendar · 8.9/10
  • Free planboth
  • Most featuresNextcloud Calendar · 3 of 4

Nextcloud Calendar scores higher on our rubric for calendar apps: 8.9 against 8.6 out of 10; our editors rank them #5 and #8.

Nextcloud Calendar is the better fit for self-hosting teams needing collaborative scheduling. KOrganizer is the better fit for linux users needing open-source group calendaring.

  • Nextcloud Calendar fits best

    Self-hosting teams needing collaborative scheduling

  • KOrganizer fits best

    Linux users needing open-source group calendaring

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Side by side

Feature Nextcloud Calendar 8.9/10 Visit ↗ KOrganizer 8.6/10 Visit ↗
At a glance
Editor score 8.9 8.6
Ranking #5 in Calendar Apps #8 in Calendar Apps
Best for Self-hosting teams needing collaborative scheduling Linux users needing open-source group calendaring
Pricing model Free plan + paid Free
Starting price €42/user/yr Free plan
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted Desktop
Platforms Web, iOS, Android, Windows, macOS, Linux Linux
Support Email, Phone, Community, Docs Community, Docs, Email
Integrations 600+ integrations 8 integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market
Features Nextcloud Calendar 3/4 · KOrganizer 1/4
Shared calendars ✓ ✓
Time blocking Not checked yet Not checked yet
Scheduling links ✓ (best) Not checked yet
Video meeting support ✓ (best) Not checked yet
Specs
Calendar sync Two_way Two_way
Mobile apps Ios and android Not checked yet
Our review
Pros
  • Open-source calendar with self-hosted deployment
  • Sharing, invitations, free/busy planning, and booking links
  • Integrates with Nextcloud Contacts, Tasks, Talk, CalDAV, and iCalendar
  • Free and open source under the GPL-2.0-or-later license
  • Group scheduling includes invitations, responses, and free/busy data
  • Supports CalDAV, Google Calendar, Nextcloud, Kolab, and more
Cons
  • Paid Enterprise subscriptions start at 100 users
  • No time-blocking feature
  • Mobile access relies on CalDAV-supported calendar workflows
  • Officially available only as a Linux desktop application
  • No mobile apps for calendar access away from the desktop
  • Does not include verified booking links or time-blocking tools
Our verdict

Nextcloud Calendar is an open-source calendar app for Nextcloud instances, aimed at individuals and teams that need shared scheduling with control over deployment. It supports multiple calendars, event management, recurring events,…

Read the review →

KOrganizer is KDE’s calendar and scheduling component for Kontact, designed for Linux desktop users who need more than basic event entry. It brings together events, to-dos, journals, reminders, recurring appointments, multiple calendars,…

Read the review →
  1. Nextcloud CalendarCalendar Apps 8.9Free plan
  2. KOrganizerCalendar Apps 8.6Free plan

Strengths and trade-offs

  • Nextcloud Calendar — where it wins

    • Open-source calendar with self-hosted deployment
    • Sharing, invitations, free/busy planning, and booking links
    • Integrates with Nextcloud Contacts, Tasks, Talk, CalDAV, and iCalendar

    Where it doesn't

    • Paid Enterprise subscriptions start at 100 users
    • No time-blocking feature
    • Mobile access relies on CalDAV-supported calendar workflows

  • KOrganizer — where it wins

    • Free and open source under the GPL-2.0-or-later license
    • Group scheduling includes invitations, responses, and free/busy data
    • Supports CalDAV, Google Calendar, Nextcloud, Kolab, and more

    Where it doesn't

    • Officially available only as a Linux desktop application
    • No mobile apps for calendar access away from the desktop
    • Does not include verified booking links or time-blocking tools
  • Nextcloud Calendar8.9/10 · Free plan

    A collaborative calendar for teams that want self-hosting, sharing, and booking links.

    Visit NextcloudFull verdict →
  • KOrganizer8.6/10 · Free plan

    A capable Linux group calendar for users who value open standards and source freedom.

    Visit KDEFull verdict →

More comparisons

All calendar apps comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update