SHSelfHostIndex

ETAR vs vdirsyncer

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?
ET ETAR Open-source calendar server companion for events VS VD vdirsyncer Synchronize calendars and contacts via CalDAV/CardDAV
FeatureETARvdirsyncer
CategoryCalendar & ContactsCalendar & Contacts
LicenseGPL-3.0BSD-3-Clause
LanguageJavaPython
Setup difficultyMediumMedium
Min. RAM256 MB64 MB
Deploymentdocker, sourcebinary, source
GitHub stars★ 2,565★ 1,859
First released20162014
ReplacesGoogle CalendariCloud sync

Why pick each one

Choose ETAR if…

  • Open ecosystem
  • No vendor lock-in
ETAR details

Choose vdirsyncer if…

  • Released under the BSD-3-Clause license
  • Active community (1.9k GitHub stars)
  • Written in Python
  • Tiny footprint — runs in 64 MB RAM
vdirsyncer details

Frequently asked questions

Is ETAR or vdirsyncer better?

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

Are ETAR and vdirsyncer free and open-source?

Yes. ETAR is licensed under GPL-3.0 and vdirsyncer under BSD-3-Clause. Both can be self-hosted at no software cost.

Can I run ETAR and vdirsyncer with Docker?

ETAR: yes. vdirsyncer: check the project docs for container support.

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