Open Event Server vs OpnForm
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?
Open Event Server
Self-hosted event management and ticketing backend
VS
OpnForm
Beautiful open-source form builder
| Feature | Open Event Server | OpnForm |
|---|---|---|
| Category | Calendar & Contacts | Calendar & Contacts |
| License | GPL-3.0 | AGPL-3.0 |
| Language | Python | PHP |
| Setup difficulty | Hard | Medium |
| Min. RAM | 1,024 MB | 512 MB |
| Deployment | docker, source | docker |
| GitHub stars | ★ 3,006 | ★ 3,545 |
| First released | 2016 | 2026 |
| Replaces | Eventbrite, Sched | — |
Why pick each one
Choose Open Event Server if…
- Released under the GPL-3.0 license
- First-class Docker support for quick deployment
- Active community (3k GitHub stars)
- Written in Python
Choose OpnForm if…
- Released under the AGPL-3.0 license
- First-class Docker support for quick deployment
- Active community (3.5k GitHub stars)
- Written in PHP
Frequently asked questions
Is Open Event Server or OpnForm better?
OpnForm is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider Open Event Server if its specific feature set fits your needs better.
Are Open Event Server and OpnForm free and open-source?
Yes. Open Event Server is licensed under GPL-3.0 and OpnForm under AGPL-3.0. Both can be self-hosted at no software cost.
Can I run Open Event Server and OpnForm with Docker?
Open Event Server: yes. OpnForm: yes.