# Rapier

> Apache-2.0 Rust/WASM physics: 2D+3D, joints, SIMD

**Category:** Libraries  
**Pricing:** open-source  
**URL:** https://rapier.rs  
**GitHub:** https://github.com/dimforge/rapier  
**Added:** 2026-09-04

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## The Hook

Rapier is the Rust/WASM physics engine when Matter.js stops at 2D MIT.

## What's Good

Apache-2.0. 2D and 3D, joints, SIMD, optional determinism. Native Rust and WASM builds. Dimforge stack next to nalgebra.

## The Catch

Rust/WASM 2D+3D with joints/SIMD/optional determinism — Matter.js is MIT 2D only. Planck HOLD (same 2D JS slot as Matter). Distinct from Matter.js.

## Verdict

Apache-2.0 2D+3D physics. Not Matter.js 2D.