Core features and highlights
Bun is an extremely fast all-in-one JavaScript/TypeScript runtime that integrates a runtime, bundler, package manager, and tester. Built on Zig, it includes native support for fetch, WebSocket, and SQLite, and offers progressive compatibility with common Node APIs.
Use cases and target users
Well-suited for building high-performance backend services, edge deployments, APIs, full-stack applications, and developer tooling scripts. Aimed at frontend and backend engineers, startups, and developers who prioritize fast builds and a simplified toolchain.
Key advantages and highlights
- Much faster dependency installs and cold starts:
bun installand runtime responsiveness outperform traditional tools - Single binary, integrated toolchain that reduces configuration and context switching
- Built-in TypeScript/JS transpilation, bundling, and test runner for a unified developer experience
- Low latency and low memory usage, suitable for CI/CD and edge deployments