SHSelfHostIndex

OpenCalendar Sync vs Calcom Calendar

A side-by-side comparison of two self-hosted apps from related categories — licensing, setup difficulty, resource needs, and what each one replaces.

Not the right match-up?
OP OpenCalendar Sync Self-hosted shared calendar with public event pages VS CA Calcom Calendar Open-source scheduling and appointment booking platform
FeatureOpenCalendar SyncCalcom Calendar
CategoryCalendar & ContactsGroupware
LicenseMITAGPL-3.0
LanguageTypeScriptTypeScript
Setup difficultyMediumMedium
Min. RAM256 MB1,024 MB
Deploymentdocker, sourcedocker, bare-metal, source
GitHub stars★ 852★ 47,334
First released20142021
ReplacesCalendly, Google CalendarCalendly, Doodle

Why pick each one

Choose OpenCalendar Sync if…

  • Released under the MIT license
  • First-class Docker support for quick deployment
  • Written in TypeScript
  • Tiny footprint — runs in 256 MB RAM
OpenCalendar Sync details

Choose Calcom Calendar if…

  • Polished modern UX
  • Rich integrations
Calcom Calendar details

Frequently asked questions

Is OpenCalendar Sync or Calcom Calendar better?

Neither is universally better. Calcom Calendar has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.

Are OpenCalendar Sync and Calcom Calendar free and open-source?

Yes. OpenCalendar Sync is licensed under MIT and Calcom Calendar under AGPL-3.0. Both can be self-hosted at no software cost.

Can I run OpenCalendar Sync and Calcom Calendar with Docker?

OpenCalendar Sync: yes. Calcom Calendar: yes.

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