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Flax Engine
Poland
What it is
Flax Engine is a 3D game engine written in C++ and C# for projects ranging from solo development to larger teams. It supports C++, C# and visual scripting, with hot-reloading for both programming languages in the Editor. Rendering features include real-time global illumination, reflections using custom software ray tracing and GPU lightmap baking. World-building tools cover terrain, foliage, fog, nested prefabs, level streaming and large worlds using 64-bit coordinates. The engine provides low- and high-level networking APIs for multiplayer, plus online connections to services such as Steam, Xbox Live and PlayStation Network for profiles, friends, achievements, presence and cloud saves. Full Editor source code is available, though NDA-protected platform support is excluded from the public repository. Targets include desktop, mobile, web, PlayStation, Xbox and Nintendo Switch. Web support is experimental and lacks C# scripting, video playback and some other engine features. Use is free for non-commercial or educational projects; commercial releases pay a 4% royalty on earnings exceeding $250,000 per calendar quarter.
For and against
For
- Supports C++, C# and visual scripting
- Includes multiplayer networking APIs
- Provides full Editor source code
- Targets desktop, mobile and console platforms
- Free for non-commercial or educational use
Against
- Web support is experimental
- Web lacks C# scripting and video playback
- Commercial releases owe a 4% royalty above the stated threshold
The verdict
Flax Engine brings 3D development, multiplayer tools and broad target support together, with full Editor source available. Review the experimental web limitations and commercial royalty terms before choosing it for a project.
Who it suits
Flax Engine may suit solo indie developers and teams building 3D games for its listed desktop, mobile or console targets. Its visual scripting and source availability may also interest developers who want those options.
Plans and prices
Flax Engine license
Free for non-commercial or educational usage · commercial releases pay 4% royalty on earnings exceeding $250,000 per calendar quarter · full source code and supported platforms included
Read 28 Sep 2026 · flaxengine.com
Custom licensing
Per-seat monthly/yearly licensing or flat fee per project · price depends on team size and product use
Read 28 Sep 2026 · flaxengine.com
On the record
- Community Channels
- The site links to a community forum and Discord.flaxengine.com · read 28 Sep 2026
- Company Location
- The site says it was made in Poland.flaxengine.com · read 28 Sep 2026
- Console export
- Yesflaxengine.com · read 24 Sep 2026
- Developer Scalability
- Flax says projects can grow from 5 to 50 developers.flaxengine.com · read 28 Sep 2026
- Development audience
- The homepage says Flax is intended for solo indie developers and larger teams, with projects scaling from 5 to 50 developers.flaxengine.com · read 28 Sep 2026
- Development Performance
- Flax describes its development performance as highly agile and fast.flaxengine.com · read 28 Sep 2026
- Editor Extensibility
- Flax includes an extensible Flax Editor.flaxengine.com · read 28 Sep 2026
- Import Compilation
- Flax says it avoids long importing and slow compilation.flaxengine.com · read 28 Sep 2026
- Launcher
- The Flax Launcher can install and manage multiple engine versions, including daily builds from the GitHub master branch.docs.flaxengine.com · read 28 Sep 2026
- Mobile export
- Yesflaxengine.com · read 24 Sep 2026
- Multiplayer tools
- Yesflaxengine.com · read 24 Sep 2026
- Networking
- The engine provides low-level and high-level networking APIs for multiplayer games.docs.flaxengine.com · read 28 Sep 2026
- News Frequency
- Flax Facts is described as a monthly blog series.flaxengine.com · read 28 Sep 2026
- Online integrations
- Its Online system supports services such as Steam, Xbox Live and PlayStation Network for profiles, friends, achievements, presence and cloud saves.docs.flaxengine.com · read 28 Sep 2026
- Pricing Page
- The provided pricing URL returns a page-not-found message.flaxengine.com · read 28 Sep 2026
- Privacy
- The privacy policy says Google Analytics data is retained for five years for internal marketing and that private analytics data is never sold or exposed.flaxengine.com · read 28 Sep 2026
- Product
- Flax Engine is a modern 3D game engine written in C++ and C#.gitlab.flaxengine.com · read 28 Sep 2026
- Rendering
- The feature set includes realtime global illumination, reflections with custom software ray tracing, and GPU lightmap baking.flaxengine.com · read 28 Sep 2026
