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Head-to-head · Calendar Apps

Nextcloud Calendar vs OneCal

  • Updated Oct 2026
  • Both researched from official sources
  • 5 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
OneCal #20 in Calendar Apps 7.3/10 14-day trial Free trial✓ 4 of 4 features Visit OneCal

Nextcloud Calendar leads on 1 check, OneCal on 0, and 4 are even. Who comes out ahead on the 5 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 planonly Nextcloud Calendar
  • Free trialonly OneCal
  • Most featuresOneCal · 4 of 4

Nextcloud Calendar scores higher on our rubric for calendar apps: 8.9 against 7.3 out of 10; our editors rank them #5 and #20.

Nextcloud Calendar offers free plan; OneCal doesn't.

Nextcloud Calendar is the better fit for self-hosting teams needing collaborative scheduling. OneCal is the better fit for affordable multi-calendar synchronization.

  • Nextcloud Calendar fits best

    Self-hosting teams needing collaborative scheduling

  • OneCal fits best

    Affordable multi-calendar synchronization

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Nextcloud Calendar 8.9/10 Visit ↗ OneCal 7.3/10 Visit ↗
At a glance
Editor score 8.9 7.3
Ranking #5 in Calendar Apps #20 in Calendar Apps
Best for Self-hosting teams needing collaborative scheduling Affordable multi-calendar synchronization
Pricing model Free plan + paid Paid
Starting price €42/user/yr $5/user/mo
Free plan ✓ (best) —
Free trial — 14 days
Deployment Cloud, Self-hosted Cloud, Mobile
Platforms Web, iOS, Android, Windows, macOS, Linux Web, iOS, Android
Support Email, Phone, Community, Docs Email, Community, Docs
Compliance GDPR, SSO/SAML, 2FA SOC 2, GDPR, SSO/SAML
Integrations 600+ integrations 9,000+ integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Nextcloud Calendar 3/4 · OneCal 4/4
Shared calendars ✓ ✓
Time blocking Not checked yet ✓ (best)
Scheduling links ✓ ✓
Video meeting support ✓ ✓
Specs
Calendar sync Two_way Two_way
Mobile apps Ios and android Ios and android
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
  • Real-time two-way and multi-way sync for Google, Outlook, and iCloud
  • Unified calendar management with scheduling links and video meeting support
  • iOS and Android apps plus an AI assistant for calendar management
Cons
  • Paid Enterprise subscriptions start at 100 users
  • No time-blocking feature
  • Mobile access relies on CalDAV-supported calendar workflows
  • No free plan is available
  • Starter supports only 2 calendars
  • Dedicated Slack or Discord support is limited to Premium
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 →

OneCal is a calendar management platform for individuals, consultants, executives, assistants, recruiters, and teams coordinating multiple Google, Outlook, and iCloud calendars. It provides real-time synchronization, one-way and multi-way…

Read the review →
  1. Nextcloud CalendarCalendar Apps 8.9Free plan
  2. OneCalCalendar Apps 7.314-day trial

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

  • OneCal — where it wins

    • Real-time two-way and multi-way sync for Google, Outlook, and iCloud
    • Unified calendar management with scheduling links and video meeting support
    • iOS and Android apps plus an AI assistant for calendar management

    Where it doesn't

    • No free plan is available
    • Starter supports only 2 calendars
    • Dedicated Slack or Discord support is limited to Premium
  • Nextcloud Calendar8.9/10 · Free plan

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

    Visit NextcloudFull verdict →
  • OneCal7.3/10 · 14-day trial

    Affordable multi-calendar synchronization with scheduling, mobile apps, and AI assistance.

    Visit OneCalFull 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