Calendars

At a glance

• Editor score
  3.0 / 10
• Pricing
  Open source
• Best for
  Teams seeking a self-hosted calendar workspace
• Paid from
  Free
• Facts checked
  22 Sep 2026

• Where it wins

  • Shared calendars with granular team access controls
  • Recurring events support daily, weekly, monthly, and yearly rules
  • Docker Compose deployment with a CalDAV backend

• Where it doesn't

  • No mobile applications
  • No booking links or video-meeting integrations
  • External-calendar synchronization is not provided beyond CalDAV

Our verdict on Calendars

Calendars is an open-source calendar application for teams and organizations that need to create, organize, manage, and share events and schedules. Its web-based interface supports shared calendars, workspaces, recurring events, and granular access controls, making it suitable for small, mid-market, and enterprise teams that want to operate their own calendar environment. The project is maintained within the La Suite numérique ecosystem operated by France’s interministerial digital directorate and is released under the MIT License.

Self-hosting is central to the product. Calendars can be deployed with Docker Compose, giving organizations a deployment model suited to teams that manage their own infrastructure. CalDAV is the current calendar backend and provides the product’s protocol-based calendar functionality. This makes Calendars a focused fit for organizations that prioritize control over hosting and access permissions, rather than a broad scheduling ecosystem with booking pages, video meetings, or mobile clients.

The product’s strongest area is shared calendar organization: teams can arrange calendars through workspaces, define detailed access controls, and create recurring events using daily, weekly, monthly, and yearly rules. Support channels include email, community resources, and documentation. Calendars should appeal to organizations seeking an open-source, self-hosted workspace with a web interface and CalDAV foundation. Teams that need mobile access, scheduling links, video integrations, or broader calendar synchronization should choose a more feature-broad alternative.

Questions about Calendars

What does Calendars run on? Web. It runs self-hosted.

What does Calendars integrate with? 1 integration: CalDAV.

Who is Calendars built for? Small businesses, mid-market companies and enterprises (our editorial estimate).

Your product? Our editors can test Calendars in depth and publish a review, labelled as paid · from $149/mo →

Calendars pricing

Calendars fact sheet

Calendars integrations

Calendars lists 1 integrations on its own site.

• CalDAV

Alternatives to Calendars

• Google CalendarA versatile calendar for personal schedules and Google Workspace collaboration.9.4
• Microsoft OutlookA flexible calendar choice for people and teams already working in Microsoft’s ecosystem.9.2
• Zoho CalendarA low-cost calendar with booking, sync, room reservations, and broad integrations.9.1

See all Calendars alternatives →

Featured on iTechGuides

Calendars is listed in our Calendar Apps directory. Add the badge to your site — it links back to this page.

<a href="https://www.itechguides.com/products/calendars/"><img src="https://www.itechguides.com/best/badge/calendars.svg" alt="Featured on iTechGuides" width="230" height="46"></a>

Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026

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.

Last updated 14 Nov 2026 · How we research and update