Free alternatives to Unity
1 free program that can replace Unity, a pairing checked by Radar's AI reviewer or by Radar.
Unity is a game engine and editor from Unity Technologies, used to build two-dimensional and three-dimensional games, interactive experiences and simulations for phones, computers, consoles and the web. Independent developers, studios, students and teams building visualisations or training apps use it. Its use follows the licence terms set by the company.
Before switching, remember that an engine is more than a program: your scenes, scripts, assets and tools are tied to it, and projects usually cannot be opened directly in another engine. Check whether your assets (models, textures, audio) can be exported in common formats, which platforms you need to publish to, and whether the alternative has the tools you rely on, such as a visual editor, physics, animation and a way to test on real devices. Plan time to learn a new workflow, and work out how much of your code you would need to rewrite.
The alternative listed below, three.js, is a library for 3D graphics in the browser, so it suits web projects, where you build mainly with code.
| Program | Ease | You need | Risk signals | Stars | Downloads this week |
|---|---|---|---|---|---|
| three.jsA JavaScript library programmers use to show 3D scenes, animations and VR inside a web page. | Ease Edevelopers only · Web | Node.js | Few signals | 117,311+311 in 5 days | — |
Frequently asked questions
Which free alternative to Unity is the easiest to install?
three.js is the only option, with ease rating E (developers only · Web).
Is there a free alternative to Unity for Windows, Mac and Linux?
Windows: none yet. macOS: none yet. Linux: none yet.
Are the alternatives to Unity really free?
three.js is completely free.
How can I tell whether an alternative is trustworthy?
Each card shows the risk signals found, with the evidence. three.js has no signal rated attention or high. See also the guide How to find a GitHub project's official repository and avoid fake copies.