Claper vs Open Event Server
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?
Claper
The ultimate tool to interact with your audience (alternative to
VS
Open Event Server
Self-hosted event management and ticketing backend
| Feature | Claper | Open Event Server |
|---|---|---|
| Category | Calendar & Contacts | Calendar & Contacts |
| License | GPL-3.0 | GPL-3.0 |
| Language | Elixir | Python |
| Setup difficulty | Medium | Hard |
| Min. RAM | 512 MB | 1,024 MB |
| Deployment | docker | docker, source |
| GitHub stars | ★ 773 | ★ 3,006 |
| First released | 2026 | 2016 |
| Replaces | — | Eventbrite, Sched |
Why pick each one
Choose Claper if…
- Released under the GPL-3.0 license
- First-class Docker support for quick deployment
- Written in Elixir
- Lightweight — runs in 512 MB RAM
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
Frequently asked questions
Is Claper or Open Event Server better?
Neither is universally better. Open Event Server has the larger community, while Claper is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Claper and Open Event Server free and open-source?
Yes. Claper is licensed under GPL-3.0 and Open Event Server under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Claper and Open Event Server with Docker?
Claper: yes. Open Event Server: yes.