Arch
The premium Open Source alternative to Unity DOTS
🎯 Best for:Developers needing to process hundreds of thousands of entities per frame.
What is Arch?
A data-oriented alternative to object-oriented programming for C# developers, focusing on archetype-based memory layout. It enables massive multithreaded simulations by organizing data into contiguous chunks for CPU cache optimization.
Tech Stack
C#Game Development
Why Arch?
- • Extreme cache efficiency
- • No engine lock-in
- • Low allocation/GC pressure
Limitations
- • Steep architectural shift
- • Boilerplate heavy
- • Smaller community than Unity DOTS
3/5/2026
Last Update
157
Forks
35
Issues
Apache-2.0
License
Financial Leak Detected
Stop the "SaaS Tax"
Your team could be burning cash. Switching to Arch instantly boosts your runway.
Competitor Cost
-$1,440
/ year (est. based on Unity DOTS)
Self-Hosted
$0
/ year
Team Size10 Users
150+
SAVE 100%