EnTT vs Dear ImGui
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.
Open source · MIT
A lightweight C++ library for building immediate-mode graphical user interfaces, mainly for tools and games.
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 Dear ImGui if you need…
- Game developers who want an in-engine debug or tools panel
- C++ developers building internal tools that need a quick interface
- Developers who want a small GUI library with few dependencies
Side-by-side
| EnTT | Dear ImGui | |
|---|---|---|
| Type | Library | Library |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 13.2k | 76.9k |
| Setup difficulty | Advanced | Intermediate |
| How you get it | Clone and build from source | Clone and build from source |
| Main language | C++ | C++ |
| Last code update | 4 days ago | 6 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.
Dear ImGui
Dear ImGui is a C++ library for drawing graphical user interfaces such as buttons, sliders, and windows. It is described as bloat-free with minimal dependencies, and it is commonly used for debug panels and tools inside games and other software. The README provided to me was empty, so this description relies mainly on the repository's description and topics.
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
Dear ImGui
- Game developers who want an in-engine debug or tools panel
- C++ developers building internal tools that need a quick interface
- Developers who want a small GUI library with few dependencies
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
Dear ImGui
- Described as bloat-free with minimal dependencies
- Widely starred and actively pushed, with a v1.93.0 release listed
- Released under the permissive MIT license
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
Dear ImGui
- People who want a ready-made desktop app with no coding, since this is a library for developers
- Teams that need a native-looking, polished end-user interface out of the box, because the README provided does not establish this
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
Dear ImGui
- The README was not available to verify features, APIs, or setup details
- Release v1.93.0 is listed without binaries, so you build from source
- Being a library, it requires C++ programming to use
Getting started
EnTT
Clone the repository
git clone https://github.com/skypjack/entt.gitDear ImGui
Clone the repository
git clone https://github.com/ocornut/imguiFrequently asked questions
What is the difference between EnTT and Dear ImGui?
EnTT: A header-only C++ library for entity-component systems and other game-programming tools. Dear ImGui: A lightweight C++ library for building immediate-mode graphical user interfaces, mainly for tools and games. EnTT suits c++ game developers who want an ecs, while Dear ImGui suits game developers who want an in-engine debug or tools panel.
Are EnTT and Dear ImGui free?
EnTT: Free and open source. Dear ImGui: Free and open source.
Which is easier to set up, EnTT or Dear ImGui?
Dear ImGui is easier to get started with (rated intermediate); EnTT is rated advanced and usually needs more setup.
Is EnTT or Dear ImGui more popular?
Dear ImGui has more GitHub stars (76.9k) than EnTT (13.2k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to EnTT and Dear ImGui?
Other options people compare them with include Flame, PlayCanvas, Jolt Physics, 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.