SHSelfHostIndex

OpenCalendar Sync vs Tasks.org CalDAV Sync

A side-by-side comparison of two self-hosted calendar & contacts options — 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 TA Tasks.org CalDAV Sync Open-source calendar and task sync client for Android
FeatureOpenCalendar SyncTasks.org CalDAV Sync
CategoryCalendar & ContactsCalendar & Contacts
LicenseMITGPL-3.0
LanguageTypeScriptKotlin
Setup difficultyMediumEasy
Min. RAM256 MB128 MB
Deploymentdocker, sourcebinary, source
GitHub stars★ 852★ 2,784
First released20142013
ReplacesCalendly, Google CalendarGoogle Calendar Sync, iCloud sync

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 Tasks.org CalDAV Sync if…

  • Released under the GPL-3.0 license
  • Easy to set up — beginner-friendly
  • Active community (2.8k GitHub stars)
  • Written in Kotlin
Tasks.org CalDAV Sync details

Frequently asked questions

Is OpenCalendar Sync or Tasks.org CalDAV Sync better?

Tasks.org CalDAV Sync is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider OpenCalendar Sync if its specific feature set fits your needs better.

Are OpenCalendar Sync and Tasks.org CalDAV Sync free and open-source?

Yes. OpenCalendar Sync is licensed under MIT and Tasks.org CalDAV Sync under GPL-3.0. Both can be self-hosted at no software cost.

Can I run OpenCalendar Sync and Tasks.org CalDAV Sync with Docker?

OpenCalendar Sync: yes. Tasks.org CalDAV Sync: check the project docs for container support.

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