Nextcloud Calendar vs KOrganizer

Nextcloud Calendar8.0Visit KOrganizer—Visit

Higher score Nextcloud Calendar #5 in Calendar Apps 8.0/10 Free plan · paid from €42/user/yr Free plan✓ 3 of 4 features Visit Nextcloud

vs

KOrganizer #8 in Calendar Apps —/10 Free plan Free plan✓ 1 of 4 features Visit KDE

• 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 8.0/10 Visit ↗	KOrganizer —/10 Visit ↗
At a glance
Editor score	8.0	—
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	Not published	Not published
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 published	Not published
Scheduling links	✓ (best)	Not published
Video meeting support	✓ (best)	Not published
Specs
Calendar sync	Two_way	Two_way
Mobile apps	Ios and android	Not published
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 →

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 Calendar8.0/10 · Free plan · paid from €42/user/yr

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

  Visit NextcloudFull verdict →
• KOrganizer—/10 · Free plan

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

  Visit KDEFull verdict →