Rspack
ByteDance, 2023 — a Rust implementation of webpack with the same plugin API. 10× faster on large projects without ditching the webpack ecosystem.
Sweet spot: existing webpack projects where builds take 5+ minutes. Supports most loaders and plugins directly; some need adaptation. Rspress (docs framework) and Modern.js are built on Rspack.
Competitor: Vite (faster dev server), Turbopack (Next.js-bound), esbuild (faster but not webpack-compatible), Rollup (lib-focused). Wins when you have a webpack config worth keeping.