CTFd vs Endless Sky
A side-by-side comparison of two self-hosted game servers options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
CTFd
Open-source capture the flag framework for hacking competitions
VS
Endless Sky
Free space exploration and trading game
| Feature | CTFd | Endless Sky |
|---|---|---|
| Category | Game Servers | Game Servers |
| License | Apache-2.0 | GPL-3.0 |
| Language | Python | C++ |
| Setup difficulty | Medium | Easy |
| Min. RAM | 512 MB | 512 MB |
| Deployment | docker, bare-metal | bare-metal, binary, source |
| GitHub stars | ★ 6,776 | ★ 7,490 |
| First released | 2017 | 2015 |
| Replaces | HackerRank CTF | Escape Velocity |
Why pick each one
Choose CTFd if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Mature project with 6.8k GitHub stars
- Written in Python
Frequently asked questions
Is CTFd or Endless Sky better?
Endless Sky is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider CTFd if its specific feature set fits your needs better.
Are CTFd and Endless Sky free and open-source?
Yes. CTFd is licensed under Apache-2.0 and Endless Sky under GPL-3.0. Both can be self-hosted at no software cost.
Can I run CTFd and Endless Sky with Docker?
CTFd: yes. Endless Sky: check the project docs for container support.