Thunderbird Appointment 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?
FeatureThunderbird AppointmentTasks.org Server alt nono Calendarserver
CategoryCalendar & ContactsCalendar & Contacts
LicenseMPL-2.0Apache-2.0
LanguagePythonPython
Setup difficultyMediumHard
Min. RAM512 MB512 MB
Deploymentdocker, sourcebare-metal, source
GitHub stars★ 547★ 506
First released20232007
ReplacesCalendly, DoodleGoogle Calendar, Exchange

Why pick each one

Choose Thunderbird Appointment if…

  • Released under the MPL-2.0 license
  • First-class Docker support for quick deployment
  • Written in Python
  • Lightweight — runs in 512 MB RAM
Thunderbird Appointment 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 Thunderbird Appointment or Tasks.org Server alt nono Calendarserver better?

Thunderbird Appointment 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 Thunderbird Appointment and Tasks.org Server alt nono Calendarserver free and open-source?

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

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

Thunderbird Appointment: yes. Tasks.org Server alt nono Calendarserver: check the project docs for container support.

Related comparisons