Calendars review
A self-hosted team calendar with shared workspaces and granular access control.
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
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).
Calendars pros and cons
- 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
Calendars fact sheet, pricing and score →
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