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Best / Calendar servers

Best open-source Calendar servers

The best self-hosted calendar split in the c17.io catalog is Cal.com for an MIT booking page, Rallly when you want that AGPL-3.0 meeting poll rather than a booking page — already on /best/scheduling-polls, EasyAppointments when you want that GPL-3.0 staff calendar, and Radicale when the job is a GPL-3.0 CalDAV box rather than a booking UI — /compare/radicale-vs-baikal. This is not Reclaim's every habit or defensive-meeting SKU, or Motion's every AI day-planner pack. A public booking page with more logos stays on /best/scheduling-booking. A group poll stays on /best/scheduling-polls.

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Ranked picks

  1. 1

    Cal.com

    MIT booking page (49,079 stars in the catalog). Already on /best/scheduling-booking.

    When to pick it: A public URL someone else books.

    49,079 stars in the catalog

  2. 2

    Rallly

    AGPL-3.0 meeting polls already on /best/scheduling-polls.

    When to pick it: Find a time, not a booking page.

    5,308 stars in the catalog

  3. 3

    Easy!Appointments

    GPL-3.0 staff appointments (4,440 stars in the catalog).

    When to pick it: A service calendar if Cal.com is not the shape.

    4,440 stars in the catalog

  4. 4

    Radicale

    GPL-3.0 CalDAV/CardDAV (5,124 stars in the catalog). /compare/radicale-vs-baikal.

    When to pick it: A calendar file clients sync, not a booking UI.

    5,124 stars in the catalog

How they compare

ToolLicenseSelf-hostBest for
Cal.comMIT LicenseMediumA public URL someone else books.
RalllyGNU Affero General Public License v3.0EasyFind a time, not a booking page.
Easy!AppointmentsGNU General Public License v3.0EasyA service calendar if Cal.com is not the shape.
RadicaleGPL-3.0EasyA calendar file clients sync, not a booking UI.

Related pages

FAQ

Cal.com or Radicale?
Cal.com if you want a public booking page. Radicale if you want CalDAV files — /compare/radicale-vs-baikal.
Reclaim or Motion?
These are hosted planners. The tools listed here do not cover every AI planning feature.
Is this Calendly?
See /best/scheduling-booking for individual booking tools. This page covers calendar servers too.
Are these free?
Cal.com is MIT in the catalog. Rallly is AGPL-3.0. EasyAppointments and Radicale are GPL-3.0. You pay hosting. Template users never pay c17.
How do I deploy it?
See /stacks/radicale-contacts for CalDAV and CardDAV. Follow the selected tool's installation documentation.

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