SHSelfHostIndex

Thunderbird Appointment vs Calcom Calendar

A side-by-side comparison of two self-hosted apps from related categories — licensing, setup difficulty, resource needs, and what each one replaces.

Not the right match-up?
TH Thunderbird Appointment Self-hostable scheduling tool for booking meetings VS CA Calcom Calendar Open-source scheduling and appointment booking platform
FeatureThunderbird AppointmentCalcom Calendar
CategoryCalendar & ContactsGroupware
LicenseMPL-2.0AGPL-3.0
LanguagePythonTypeScript
Setup difficultyMediumMedium
Min. RAM512 MB1,024 MB
Deploymentdocker, sourcedocker, bare-metal, source
GitHub stars★ 547★ 47,334
First released20232021
ReplacesCalendly, DoodleCalendly, Doodle

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 Calcom Calendar if…

  • Polished modern UX
  • Rich integrations
Calcom Calendar details

Frequently asked questions

Is Thunderbird Appointment or Calcom Calendar better?

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

Are Thunderbird Appointment and Calcom Calendar free and open-source?

Yes. Thunderbird Appointment is licensed under MPL-2.0 and Calcom Calendar under AGPL-3.0. Both can be self-hosted at no software cost.

Can I run Thunderbird Appointment and Calcom Calendar with Docker?

Thunderbird Appointment: yes. Calcom Calendar: yes.

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