Vite is a fast build tool and development server for modern JavaScript frameworks like React, Vue, and Svelte. Uses Rollup for optimized production builds. Extremely developer-friendly with a minimal config setup.

SWC (Speedy Web Compiler) is a super-fast JavaScript/TypeScript compiler written in Rust. Supports JSX, TypeScript, and modern JavaScript features. Can be used in bundlers like Webpack, Vite, or standalone.