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Game Development · head to head

Bevy vs Flax Engine

Bevy logo

Bevy

Game Development

A refreshingly simple data-driven game engine built in Rust

From
Free
Rated
-
Full reviewWebsite
Flax Engine logo

Flax Engine

Game Development

Modern 3D game engine with visual editor

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Bevy rust only, so it assumes a language most game teams do not already use; Flax Engine flax charges a 4% royalty on game earnings above $250,000, assessed per calendar quarter
  • They diverge on capability: Bevy covers Entity Component System, Flax Engine covers 3D graphics rendering.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Bevy and Flax Engine actually diverge.

Attributes where Bevy and Flax Engine differ
AttributeBevyFlax Engine
PlatformsWindows, Macos, Linux, WebglWindows, Linux, Playstation, Xbox
Founded20202017

Identical on both: starting price (Free), pricing model (free), free tier (Yes), user rating (Not yet rated), category (Game Development).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Bevy

  • Entity Component System
  • 2D/3D rendering
  • Asset pipeline
  • Hot reloading
  • Cross-platform
  • Modular architecture
  • Parallel systems
  • Rust ecosystem

Only in Flax Engine

  • 3D graphics rendering
  • Visual editor
  • C# scripting
  • Physics engine
  • Particle effects
  • Skeletal animation
  • Material system
  • Lighting system

Both cover

  • Audio system
  • Local deployment
  • Windows support
  • Linux support

What people use each for

The jobs each tool is most often brought in to do.

Bevy

  • 2D and 3D game development in Rustnot Flax Engine
  • Data-driven design using an entity component systemnot Flax Engine
  • Shipping to Windows, macOS, Linux, web, iOS and Android from one codebasenot Flax Engine
  • Projects wanting a permissive licence with no royalties or feesnot Flax Engine

Flax Engine

  • Building 3D games in C# and C++ with full engine source accessnot Bevy
  • Multi-platform deployment from one editornot Bevy
  • Prototyping with the bundled Flax Samples projectsnot Bevy

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Bevy

  • Rust only, so it assumes a language most game teams do not already use
  • No visual editor of the kind Unity or Godot provide, so scenes and logic are written in code
  • Built around ECS, which is a different mental model from the scene-graph engines most developers come from

Flax Engine

  • Flax charges a 4% royalty on game earnings above $250,000, assessed per calendar quarter
  • Free use is granted for non-commercial or educational usage; commercial releases fall under the royalty
  • Users must accept the Flax Engine End-User License Agreement before using the engine or its tools, so it is not an OSI open source licence despite the source being on GitHub
  • Non-game uses such as in-house tools or SaaS products need a custom licence negotiated with the vendor, and no rate card is published for per-seat or flat-fee options

Pricing, plan by plan

Bevy

Free
  • Open SourceFree
    • Full engine access
    • ECS architecture
    • Hot reloading

Flax Engine

Free
  • FreeFree
    • Full engine
    • Visual editor
    • C# scripting

Which should you pick?

Choose Bevy if

  • You need entity component system.
  • You want to start without paying.
  • You work on Windows, Macos, Linux, Webgl.
  • You also want 2d/3d rendering.
Bevy review

Choose Flax Engine if

  • You need 3d graphics rendering.
  • You want to start without paying.
  • You work on Windows, Linux, Playstation, Xbox.
  • You also want visual editor.
Flax Engine review

Questions people ask

Is Bevy or Flax Engine better?
Neither clearly leads. Bevy starts at Free and Flax Engine at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Bevy or Flax Engine?
Bevy starts at Free and Flax Engine at Free.
Does Bevy or Flax Engine run on more platforms?
Bevy runs on Windows, Macos, Linux, Webgl. Flax Engine runs on Windows, Linux, Playstation, Xbox.
Can I use Bevy for free?
Both have a free tier, so you can try either at no cost before committing.
What is Bevy best used for?
Bevy is most often used for 2d and 3d game development in rust, data-driven design using an entity component system, shipping to windows, macos, linux, web, ios and android from one codebase, projects wanting a permissive licence with no royalties or fees. Of those, 2d and 3d game development in rust and data-driven design using an entity component system are not what Flax Engine is typically brought in for.
What can Bevy do that Flax Engine cannot?
Bevy covers Entity Component System, 2D/3D rendering, Asset pipeline, Hot reloading. Flax Engine covers 3D graphics rendering, Visual editor, C# scripting, Physics engine. Both handle Audio system, Local deployment, Windows support, Linux support.

Answered from the vendors’ own pages

Bevy: How much does Bevy Engine cost?

Bevy is 100% free, forever. There are no licensing fees, contracts, or sales cuts, whether for development, deployment, or commercial use.

Source
Flax Engine: How much does Flax Engine cost?

Flax Engine is free during development. Once you ship a game commercially, you pay a 4% royalty on earnings only if your quarterly revenue exceeds $250,000 in a calendar quarter. Below that threshold, there is no royalty charge.

Source
Bevy: Is Bevy Engine open source?

Yes. Bevy is open source under the permissive MIT or Apache 2.0 licenses, meaning you can use, modify, and distribute it freely.

Source
Flax Engine: Is Flax Engine free for educational and uncommercial projects?

Yes. Flax Engine is free for uncommercial or educational usage. You only pay royalties when you release a commercial product that exceeds the $250,000 quarterly earnings threshold.

Source
Bevy: Are there any hidden costs with Bevy Engine?

No. Bevy has no license fees, contracts, or hidden charges. It is community-driven and funded through voluntary donations rather than commercial licensing.

Source
Flax Engine: Do all Flax Engine users get access to the same features?

Yes. There is one version of Flax Engine. All users get full engine access with all features, supported platforms, complete editor source code on GitHub, sample projects, and free deployment to all supported platforms.

Source
Flax Engine: Does Flax Engine offer custom licensing options?

Yes. For non-game industries or specific needs, Flax Engine offers custom licensing including per-seat licensing (monthly or yearly) or flat fees per project, with pricing based on team size and product use case.

Source
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