Mozilla's standalone WebAssembly engine built on SpiderMonkey — a fast JS-in-Wasm runtime used in production at Fastly and Fermyon.
StarlingMonkey is a Bytecode Alliance / Mozilla project that packages the SpiderMonkey JavaScript engine as a standalone WebAssembly module. It powers the Fastly JS Compute runtime (via js-compute-runtime) and the JavaScript SDK in Fermyon Spin, giving both platforms a high-fidelity JavaScript execution environment with predictable cold-start behavior. StarlingMonkey is the reference implementation of a Wasm-embeddable JS engine for the edge.
A lightweight WebAssembly runtime built for embedded systems, IoT devices, and constrained environments.
A fast, secure WebAssembly runtime built by the Bytecode Alliance with full WASI 0.2 and Component Model support.
The JavaScript host and transpiler for WebAssembly components — run any component in Node.js or the browser.