SHSelfHostIndex

Horde Kronolith 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?
HO Horde Kronolith Calendar application from the Horde groupware suite VS TA Tasks.org CalDAV Sync Open-source calendar and task sync client for Android
FeatureHorde KronolithTasks.org CalDAV Sync
CategoryCalendar & ContactsCalendar & Contacts
LicenseGPL-2.0GPL-3.0
LanguagePHPKotlin
Setup difficultyHardEasy
Min. RAM256 MB128 MB
Deploymentbare-metalbinary, source
GitHub stars★ 10★ 2,784
First released20032013
ReplacesGoogle Calendar, ExchangeGoogle Calendar Sync, iCloud sync

Why pick each one

Choose Horde Kronolith if…

  • Released under the GPL-2.0 license
  • Written in PHP
  • Tiny footprint — runs in 256 MB RAM
Horde Kronolith 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 Horde Kronolith 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 Horde Kronolith if its specific feature set fits your needs better.

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

Yes. Horde Kronolith is licensed under GPL-2.0 and Tasks.org CalDAV Sync under GPL-3.0. Both can be self-hosted at no software cost.

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

Horde Kronolith: check the project docs for container support. Tasks.org CalDAV Sync: check the project docs for container support.

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