head to head · open source
imgui vs Fyrox
imgui has 77,109 GitHub stars, 12,111 forks, 1,227 open issues and last shipped 2 days ago. Fyrox has 9,680 stars, 465 forks, 59 open issues and last shipped yesterday. imgui leads on adoption by 697% (77,109 vs 9,680 stars). imgui is written in C++ under MIT; Fyrox is written in Rust under MIT. imgui has attracted 16% as many forks as stars, Fyrox 5%. Fyrox was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 4 topic tags (game-development, game-engine, gamedev, gui), 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
| imgui | Fyrox | |
|---|---|---|
| GitHub stars | ★ 77K | ★ 9.7K |
| License | MIT | MIT |
| Written in | C++ | Rust |
| Last push | 2026-11-13 | 2026-11-14 |
| Forks | ⑂ 12K | ⑂ 465 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick imgui if
- You weight community size — 77K stars and counting
- You want the MIT license terms
- Your stack matches C++
- You value the larger contributor base for long-term maintenance
pick Fyrox if
- You want the Fyrox feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Rust
- You evaluated both and Fyrox fits your workflow better
About imgui
Dear ImGui ===== "Give someone state and they'll have a bug one day, but teach them how to represent state in two separate locations that have to be kept in sync and they'll have bugs for a lifetime." ryg (This library is available under a free and permissive license, but needs financial support to sustain its continued improvements. In addition to maintenance and stability there are many desirable features yet to be added. If your company is using Dear ImGui, please consider reaching out.) Businesses: support continued development and maintenance via invoiced sponsoring/support contracts: E mail: contact @…
read the full imgui overview →
About Fyrox
Fyrox a modern Rust game engine A feature rich, production ready, general purpose 2D/3D game engine written in Rust with a scene editor. Formerly known as rg3d Learning materials Read the official Fyrox book here. It contains comprehensive information about many aspects of the engine, starting by "how to build" and ending by various tutorials. Community You can always ask your question in Discord server Join the Discord server, or directly in Discussions. Examples You can run examples directly in your web browser, the full list of demo projects is available here. Source code for each demo project can be found…
read the full Fyrox overview →
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Frequently asked questions
Is imgui or Fyrox more popular?
imgui has 77,109 GitHub stars and Fyrox has 9,680. imgui has the larger community by that measure.
Are imgui and Fyrox free?
Both are open source. imgui is licensed under MIT and Fyrox under MIT. Neither carries a licence fee.
What is the difference between imgui and Fyrox?
imgui is written in C++ and Fyrox in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, imgui or Fyrox?
Choose imgui if you want the larger community (77,109 stars) or its MIT licence terms. Choose Fyrox if its feature set, stack or MIT licence fits better. Both are self-hostable.