Head-to-head · Game Engine Software
Open 3D Engine vs Flax Engine
Open 3D Engine leads on 0 checks, Flax Engine on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.
Our verdict
- Highest scoreOpen 3D Engine · 7.7/10
- Free planboth
- Most featuresFlax Engine · 4 of 4
Open 3D Engine scores higher on our rubric for game engine software: 7.7 against 7.5 out of 10; our editors rank them #20 and #22.
On source code model, Flax Engine gives you Source_available where Open 3D Engine offers Open_source.
Open 3D Engine is the better fit for open-source modular 3D teams. Flax Engine is the better fit for teams wanting Unreal-like breadth.
- Open 3D Engine fits best
Open-source modular 3D teams
- Flax Engine fits best
Teams wanting Unreal-like breadth
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Side by side
| Feature | Open 3D Engine 7.7/10 Visit ↗ | Flax Engine 7.5/10 Visit ↗ |
|---|---|---|
| At a glance | ||
| Editor score | 7.7 | 7.5 |
| Ranking | #20 in Game Engine Software | #22 in Game Engine Software |
| Best for | Open-source modular 3D teams | Teams wanting Unreal-like breadth |
| Pricing model | Free | Free |
| Starting price | Free plan | Free plan |
| Free plan | ✓ | ✓ |
| Free trial | — | — |
| Deployment | Self-hosted | Desktop |
| Platforms | Windows, Linux | Windows, Linux |
| Support | Community, Docs | Docs, Community |
| Built for | Small business, Mid-market, Enterprise | Solo, Small business, Mid-market, Enterprise |
| Features Open 3D Engine 3/4 · Flax Engine 4/4 | ||
| Visual scripting | ✓ | ✓ |
| Multiplayer tools | ✓ | ✓ |
| Mobile export | ✓ | ✓ |
| Console export | Not checked yet | ✓ (best) |
| Specs | ||
| Source code model | Open_source | Source_available |
| Target platforms | Windows, Linux, Android | Windows, Linux, Android, iOS, PlayStation 4/5, Xbox One/Series, Nintendo Switch |
| Scripting languages | C++, Lua, Script Canvas | C#, C++ |
| Our review | ||
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| Our verdict | Open 3D Engine (O3DE) is an open-source, cross-platform real-time 3D engine for building games, simulations, and other interactive experiences. It is aimed at teams that want source-code access, modular engine components, and control over… Read the review → |
Flax Engine is a 3D game engine for independent developers, studios and teams creating games or interactive applications. Its editor combines C++ and C# scripting with visual scripting, while the broader toolkit covers rendering,… Read the review → |
Strengths and trade-offs
Open 3D Engine — where it wins
- Free and open source with a modular Gems architecture
- Physically based rendering, physics, networking, and visual scripting
- Supports Windows, Linux, macOS, Android, and iOS development
Where it doesn't
- macOS and iOS support are documented as experimental
- Console deployment is not covered in the published platform details
- Its broad toolset may require more technical planning than narrower engines
Flax Engine — where it wins
- Supports C++, C# and visual scripting
- Includes multiplayer, VFX, animation and open-world tools
- Exports across desktop, mobile, web and consoles
Where it doesn't
- Commercial releases generally use a revenue-share license
- Console deployment may require platform-specific access or licensing
- Public source is available under the Flax EULA, not an open-source license
- Open 3D Engine7.7/10 · Free plan
A modular, open-source 3D engine for teams building games and interactive experiences.
Visit Open 3D EngineFull verdict → - Flax Engine7.5/10 · Free plan
Broad 3D development tools for teams building games across desktop, mobile, web and consoles.
Visit Flax EngineFull verdict →
All game engine software comparisons → · Full ranking →
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update