SHSelfHostIndex

Horde Kronolith vs ETAR

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 ET ETAR Open-source calendar server companion for events
FeatureHorde KronolithETAR
CategoryCalendar & ContactsCalendar & Contacts
LicenseGPL-2.0GPL-3.0
LanguagePHPJava
Setup difficultyHardMedium
Min. RAM256 MB256 MB
Deploymentbare-metaldocker, source
GitHub stars★ 10★ 2,565
First released20032016
ReplacesGoogle Calendar, ExchangeGoogle Calendar

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 ETAR if…

  • Open ecosystem
  • No vendor lock-in
ETAR details

Frequently asked questions

Is Horde Kronolith or ETAR better?

ETAR is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Horde Kronolith if its specific feature set fits your needs better.

Are Horde Kronolith and ETAR free and open-source?

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

Can I run Horde Kronolith and ETAR with Docker?

Horde Kronolith: check the project docs for container support. ETAR: yes.

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