Calcom Calendar vs ZenTao
A side-by-side comparison of two self-hosted groupware options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Calcom Calendar
Open-source scheduling and appointment booking platform
VS
ZenTao
Open-source project and team collaboration platform
| Feature | Calcom Calendar | ZenTao |
|---|---|---|
| Category | Groupware | Groupware |
| License | AGPL-3.0 | AGPL-3.0 |
| Language | TypeScript | PHP |
| Setup difficulty | Medium | Medium |
| Min. RAM | 1,024 MB | 1,024 MB |
| Deployment | docker, bare-metal, source | docker, bare-metal |
| GitHub stars | ★ 47,334 | ★ 1,665 |
| First released | 2021 | 2009 |
| Replaces | Calendly, Doodle | Jira, Confluence |
Why pick each one
Frequently asked questions
Is Calcom Calendar or ZenTao 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 Calcom Calendar and ZenTao free and open-source?
Yes. Calcom Calendar is licensed under AGPL-3.0 and ZenTao under AGPL-3.0. Both can be self-hosted at no software cost.
Can I run Calcom Calendar and ZenTao with Docker?
Calcom Calendar: yes. ZenTao: yes.