JavaScript/TypeScript Sandbox Runtime

Developers need a safe way to run user-submitted scripts (plugins, rules, edge logic) without security risks. Afterburner is a Rust-based JS/TS runtime with built-in capability sandboxing, fuel limits, and memory caps—easy to embed in any Rust application.

Demand for safe user-code execution is rising sharply as AI coding tools make it trivial for non-engineers to write and submit scripts, and as SaaS platforms increasingly offer plugin or rules engines to differentiate. Cloudflare Workers and Deno Deploy handle sandboxed execution at the infrastructure layer, but there's no clear incumbent for an embeddable Rust-native runtime that a developer drops into their own application. The $2k–10k/mo band is realistic only through API or SDK licensing—seats or usage-based pricing—but the customer has to be building something that already has user-submitted code as a core feature, which narrows the addressable market considerably. The biggest risk is that WebAssembly-based alternatives like wasmtime with component model, or simply shipping a Deno subprocess, are good enough for most teams and require no new dependency, making differentiation on "Rust-native" feel thin unless the performance and security story is airtight and well-documented with benchmarks.