Lichess vs PyChess-Variants
A side-by-side comparison of two self-hosted game servers options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Lichess | PyChess-Variants |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 77 · Good | 72 · Good |
| Category | Game Servers | Game Servers |
| License | AGPL-3.0 | GPL-3.0 |
| Language | Scala | Python |
| Setup difficulty | Hard | Hard |
| Min. RAM | 4,096 MB | 1,024 MB |
| Deployment | docker, source | docker, source |
| GitHub stars | ★ 18,760 | ★ 309 |
| First released | 2010 | 2019 |
| Replaces | Chess.com | Chess.com, Lichess |
What are Lichess and PyChess-Variants?
Lichess
Lichess is a free, open-source chess server. The full platform, including game play, analysis, puzzles, and tournaments, can be self-hosted, though it is a large multi-service application.
- Real-time chess gameplay
- Analysis board and engine
- Puzzles and tournaments
- Open API
PyChess-Variants
PyChess-Variants is the open-source software powering pychess.org, a website for playing chess and many chess variants in the browser. It can be self-hosted to run a private variant chess server.
- Browser-based variant chess
- Real-time multiplayer
- Engine analysis
- Tournament support
Lichess vs PyChess-Variants: key differences
Lichess is written in Scala, while PyChess-Variants is built with Python. Licensing differs — AGPL-3.0 for Lichess versus GPL-3.0 for PyChess-Variants. PyChess-Variants is the lighter option, starting around 1,024 MB of RAM against 4,096 MB for Lichess. Lichess is the more established project (first released 2010), while PyChess-Variants arrived in 2019. Lichess has the considerably larger community, at 18,760 GitHub stars versus 309.
Why pick each one
Choose Lichess if…
- Full-featured chess platform
- Completely ad-free
Watch out for
- Very heavy to self-host
- Complex service architecture
Choose PyChess-Variants if…
- Huge variant selection
- Active development
Watch out for
- Complex to self-host
- Niche audience
Frequently asked questions
Is Lichess or PyChess-Variants better?
Neither is universally better. Lichess has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Lichess and PyChess-Variants free and open-source?
Yes. Lichess is licensed under AGPL-3.0 and PyChess-Variants under GPL-3.0. Both can be self-hosted at no software cost.
Can I run Lichess and PyChess-Variants with Docker?
Lichess: yes. PyChess-Variants: yes.
Which is lighter on resources, Lichess or PyChess-Variants?
PyChess-Variants has the smaller minimum footprint at 1,024 MB of RAM, compared to about 4,096 MB for Lichess. Real-world usage depends on library size, user count, and enabled features.