Etar vs Tasks.org Server alt nono Calendarserver

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? Compare Etar with Compare Tasks.org Server alt nono Calendarserver with

ET Etar Open-source Android calendar app that syncs over CalDAV VS TA Tasks.org Server alt nono Calendarserver Archived Standards-compliant calendar and scheduling server

Feature	Etar	Tasks.org Server alt nono Calendarserver
Deploy effort	Read-the-docs project	Read-the-docs project
Health score	87 · Excellent	10 · At risk
Status	Actively maintained	Archived
Category	Calendar & Contacts	Calendar & Contacts
License	GPL-3.0	Apache-2.0
Language	Java	Python
Setup difficulty	Medium	Hard
Min. RAM	256 MB	512 MB
Deployment	source	bare-metal, source
GitHub stars	★ 2,603	★ 507
First released	2016	2007
Replaces	Google Calendar	Google Calendar, Exchange

What are Etar and Tasks.org Server alt nono Calendarserver?

Etar

Etar is an open-source Android calendar app forked from AOSP Calendar. It has no server of its own: pair it with DAVx5 and any self-hosted CalDAV server such as Radicale, Baikal or Nextcloud to keep events under your control.

CalDAV support
Event API
Mobile sync friendly
Open data formats

Read the full Etar guide →

Tasks.org Server alt nono Calendarserver

Calendar and Contacts Server is a CalDAV and CardDAV server originally developed by Apple. It provides shared calendaring, scheduling, and directory services for groups.

Originated at Apple
Group scheduling support
Standards-compliant CalDAV

Etar vs Tasks.org Server alt nono Calendarserver: key differences

The biggest difference is maintenance: Tasks.org Server alt nono Calendarserver's repository is archived and no longer developed, while Etar is actively maintained. Etar is written in Java, while Tasks.org Server alt nono Calendarserver is built with Python. Licensing differs — GPL-3.0 for Etar versus Apache-2.0 for Tasks.org Server alt nono Calendarserver. Etar is the lighter option, starting around 256 MB of RAM against 512 MB for Tasks.org Server alt nono Calendarserver. Tasks.org Server alt nono Calendarserver is the more established project (first released 2007), while Etar arrived in 2016. Etar has the considerably larger community, at 2,603 GitHub stars versus 507.

Why pick each one

Choose Etar if…

Open ecosystem
No vendor lock-in

Watch out for

Mainly a client project
Server piece is minimal

Etar details

Choose Tasks.org Server alt nono Calendarserver if…

Released under the Apache-2.0 license
Written in Python
Lightweight — runs in 512 MB RAM

Tasks.org Server alt nono Calendarserver details

Frequently asked questions

Is Etar or Tasks.org Server alt nono Calendarserver better?

Etar is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Tasks.org Server alt nono Calendarserver if its specific feature set fits your needs better.

Are Etar and Tasks.org Server alt nono Calendarserver free and open-source?

Yes. Etar is licensed under GPL-3.0 and Tasks.org Server alt nono Calendarserver under Apache-2.0. Both can be self-hosted at no software cost.

Can I run Etar and Tasks.org Server alt nono Calendarserver with Docker?

Etar: check the project docs for container support. Tasks.org Server alt nono Calendarserver: check the project docs for container support.

Which is lighter on resources, Etar or Tasks.org Server alt nono Calendarserver?

Etar has the smaller minimum footprint at 256 MB of RAM, compared to about 512 MB for Tasks.org Server alt nono Calendarserver. Real-world usage depends on library size, user count, and enabled features.