Entitas
Super fast Entity Component System Framework for C# and Unity
- Status
- UnmaintainedNo commits in 1124 days.
- Last checked
- Checked · Oct 8, 2026
- License
- Open source
- Pricing
- Free tier · from $0
What it is
Entitas is a high-performance ECS framework specifically designed for C# and Unity, enabling developers to build scalable and efficient game architectures.
Entitas stands out by providing a highly optimized and automatically generated ECS solution specifically tailored for Unity, reducing manual coding effort while enhancing performance.
When it fits — and when it doesn’t
A good fit for
Unity developers looking to optimize their game's architecture with an ECS framework
Teams building complex games that require high performance and scalability
Developers aiming to reduce manual coding effort through automated code generation
Look elsewhere if
Projects not using Unity or C# as the primary development environment
Small-scale projects where the overhead of setting up an ECS framework outweighs the benefits
Known weaknesses
Each one links to the public issue, changelog or docs page it came from, where we have one.
- 01
Steep learning curve for ECS newcomers
Requires a deep understanding of Entity-Component-System architecture and specific patterns used in Entitas.
- 02
Limited to C# and Unity ecosystems
Entitas is tightly integrated with C# and Unity, making it less flexible for use in other environments or languages.
- 03
Complex setup process
Initial project configuration requires setting up code generation rules and understanding the Entitas conventions which can be time-consuming.
- 04
Debugging can be challenging
The generated code and ECS patterns may make it difficult to trace issues back to their source, complicating debugging efforts.
What it does well
High-performance ECS framework for C# and Unity
Automatically generates code to reduce boilerplate
Supports complex game architectures with minimal overhead
Pricing
- Free tier
- YesOpen source — free to use
- Paid from
- $0
- Model
- Flat rate
- Enterprise plan
- No
Pricing not independently confirmed — check the vendor’s page.
Performance benchmarks
How Fast Is It?
Set up Entitas
Setup steps, common gotchas and what to check after 30 days.