EnTT vs Flame
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
A header-only C++ library for entity-component systems and other game-programming tools.
The short answer
Choose EnTT if you need…
- C++ game developers who want an ECS
- Developers building simulations or engines who need a data-oriented entity store
- C++ programmers who want reusable utilities like signals, hash maps or resource handles
- Projects that already use CMake or a C++ package manager such as vcpkg or Conan
Choose Flame if you need…
- Flutter developers who want to add a game to an app
- Developers making 2D games in Dart
- Learners exploring game loops and component systems with a familiar language
- Teams that want optional bridge packages for physics, tile maps, or animation tools
Side-by-side
| EnTT | Flame | |
|---|---|---|
| Type | Library | Library |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 13.2k | 10.8k |
| Setup difficulty | Advanced | Intermediate |
| How you get it | Clone and build from source | Install with a package manager |
| Main language | C++ | Dart |
| Last code update | 4 days ago | 4 days ago |
What each one is
EnTT
EnTT is a C++ library, written in modern C++, that provides an entity-component system (ECS), a pattern where game objects are plain IDs with attached data components, used mostly in game development. The README also lists other pieces such as a reflection system, signal handlers, resource management and an execution graph builder. It is header-only, so you include it in your project rather than linking a separate binary.
Flame
Flame is a game engine built on Flutter, the Google UI toolkit, and written in Dart. It provides common game building blocks such as a game loop, a component system, collision detection, input handling, sprites and animations, and effects. It is meant for developers who want to make games using Flutter instead of a dedicated game engine.
Best for
EnTT
- C++ game developers who want an ECS
- Developers building simulations or engines who need a data-oriented entity store
- C++ programmers who want reusable utilities like signals, hash maps or resource handles
- Projects that already use CMake or a C++ package manager such as vcpkg or Conan
Flame
- Flutter developers who want to add a game to an app
- Developers making 2D games in Dart
- Learners exploring game loops and component systems with a familiar language
- Teams that want optional bridge packages for physics, tile maps, or animation tools
Strengths
EnTT
- Header-only, so integration is mostly adding the include path
- Documented API and a wiki with FAQs
- Used by projects the README names, including Minecraft and ArcGIS Runtime SDKs
Flame
- Official bridge packages connect it to many tools, including Tiled, Rive, Spine, and Box2D physics
- Documentation, a browser-based examples site, and tutorials are linked from the README
- Active project with a large community on Discord and a recent push date
Not ideal for
EnTT
- Developers who want a full game engine with editor and rendering out of the box, since EnTT is a library of building blocks
- Developers not working in C++, because the library is written in C++
- Teams needing a ready-made binary release, since the latest release has no binaries
Flame
- People who need a full visual editor, since the README describes a code-first engine and does not mention one
- Teams building large 3D games, because the README calls the 3D package experimental
- Non-programmers, since it requires writing Dart code
Trade-offs
EnTT
- Large feature surface described only briefly in the README, so learning the whole library takes time
- Requires familiarity with C++ and ECS concepts to use effectively
- Latest release has no prebuilt binaries
Flame
- Tied to the Flutter ecosystem, so it is not a good choice if you do not want to use Flutter or Dart
- The README notes that main-branch docs can be newer than the published docs site, so version mismatches are possible
- The 3D package is labeled experimental
Getting started
EnTT
Clone the repository
git clone https://github.com/skypjack/entt.gitFlame
Add Flame to a Flutter project
git clone https://github.com/flame-engine/flameFrequently asked questions
What is the difference between EnTT and Flame?
EnTT: A header-only C++ library for entity-component systems and other game-programming tools. Flame: A game engine for building 2D games with Flutter and Dart. EnTT suits c++ game developers who want an ecs, while Flame suits flutter developers who want to add a game to an app.
Are EnTT and Flame free?
EnTT: Free and open source. Flame: Free and open source.
Which is easier to set up, EnTT or Flame?
Flame is easier to get started with (rated intermediate); EnTT is rated advanced and usually needs more setup.
Is EnTT or Flame more popular?
EnTT has more GitHub stars (13.2k) than Flame (10.8k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to EnTT and Flame?
Other options people compare them with include PlayCanvas, Jolt Physics, Dear ImGui, Phaser, JSON for Modern C++.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.