Bun

Founded by Jarred Sumner, Bun entered the developer ecosystem to address the massive speed, complexity, and tooling fragmentation bottlenecks that have plagued modern JavaScript and TypeScript development for years. While traditional setups require configuring separate utilities for transpilars, bundlers, testing libraries, and package installers, Bun consolidates this entire toolkit into a single standalone executable. Written in the Zig programming language and opting for Apple's JavaScriptCore engine over Google's V8, Bun executes code, installs npm dependencies, and runs automated testing suites up to several times faster than Node.js or Deno. It provides native support for TypeScript and JSX out of the box, implements strict compatibility layers for the Web Crypto and fetch APIs, and offers blazing-fast cold-start properties that make it an ideal runtime choice for modern edge compute deployments and serverless functions.