Stage vs Steel

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Stage compared with Steel
Detail	Stage	Steel
What it does	Where stories become worlds	GPU-accelerated rigid-body dynamics solver for robot learning
Stage	Not given	Not given
Founded	Not given	Not given
Based in	GB	Not given
Pricing model	Free	Open source
Pricing	Not given	Not given
Key features	Build games from YAML files without code Write custom mods in AssemblyScript or Rust Safe execution of custom code inside the engine Cross-platform support for macOS, Windows, and Linux Open source codebase	3.8× PhysX throughput on 20 benchmarks geometric mean 13.0× performance on heterogeneous task mixtures Per-environment work scheduling for efficiency Reduced-coordinate articulation dynamics Differentiable simulation Rigid-deformable coupling support Compliant and hydroelastic contact 62% less GPU memory than PhysX at matched batch size 3.90 million environment steps per second peak throughput
What makes it different	No coding required to build games Extensible with custom conditions and triggers Multiple programming languages for mods	Designed for heterogeneous workloads with different robots and tasks simulated together efficiently Integrated into open-source Newton for seamless adoption without separate physics stack Supports diverse physical interactions beyond rigid bodies Enables scaling of diverse robot experience for general-purpose learning
Community votes	0	0
DR (Domain Rating by Ahrefs)	5 +5 (up) since last check	67 no change since last check
Trust Flow (Majestic)	0	24
Citation Flow (Majestic)	0	40
Referring domains (Majestic)	0	2061

4 details filled in for both companies.