head to head · open source
bevy vs Kaetram-Open
bevy has 48,688 GitHub stars, 4,889 forks, 3,418 open issues and last shipped today. Kaetram-Open has 739 stars, 202 forks, 13 open issues and last shipped 5 days ago. bevy leads on adoption by 6,488% (48,688 vs 739 stars). bevy is written in Rust under Apache-2.0; Kaetram-Open is written in TypeScript under MPL-2.0. bevy has attracted 10% as many forks as stars, Kaetram-Open 27%. bevy was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (game-development, game-engine, gamedev), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| bevy | Kaetram-Open | |
|---|---|---|
| GitHub stars | ★ 49K | ★ 739 |
| License | Apache-2.0 | MPL-2.0 |
| Written in | Rust | TypeScript |
| Last push | 2026-10-08 | 2026-10-03 |
| Forks | ⑂ 4.9K | ⑂ 202 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick bevy if
- You weight community size — 49K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick Kaetram-Open if
- You want the Kaetram-Open feature set and don't need the biggest community
- You prefer the MPL-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and Kaetram-Open fits your workflow better
About bevy
Bevy is a free and open source, data driven game engine written in Rust that gives developers a complete 2D and 3D feature set through an Entity Component System architecture, and it is aimed at Rust programmers building games and interactive applications who accept an early stage engine that ships breaking API changes roughly every three months.
About Kaetram-Open
Kaetram Open is an open source 2D HTML5 MMORPG written in TypeScript, extending Little Workshop's BrowserQuest, for players who want a collaborative browser game and for developers looking for a game engine to build their own version on.
read the full Kaetram-Open overview →
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Frequently asked questions
Is bevy or Kaetram-Open more popular?
bevy has 48,688 GitHub stars and Kaetram-Open has 739. bevy has the larger community by that measure.
Are bevy and Kaetram-Open free?
Both are open source. bevy is licensed under Apache-2.0 and Kaetram-Open under MPL-2.0. Neither carries a licence fee.
What is the difference between bevy and Kaetram-Open?
bevy is written in Rust and Kaetram-Open in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, bevy or Kaetram-Open?
Choose bevy if you want the larger community (48,688 stars) or its Apache-2.0 licence terms. Choose Kaetram-Open if its feature set, stack or MPL-2.0 licence fits better. Both are self-hostable.