Bun
A fast JS runtime Node.js replacement with built‑in tools
Bun launched on December 5, 2025 with 303 votes, #67 of 11,628 launches that month and more than 95% of that year's launches.
In plain words
Bun is a JavaScript runtime designed as an alternative to Node.js, offering built-in bundling, transpilation, task running, and package management capabilities. It enables developers to bundle, install, and run JavaScript and TypeScript code without requiring additional tools. The platform consolidates multiple development utilities into a single runtime environment, streamlining the workflow for JavaScript developers.
written from the facts on this page · September 2026
From the sources
Bundle, install, and run JavaScript & TypeScript all in Bun. Bun is a new JavaScript runtime with a native bundler, transpiler, task runner, and npm client built-in.
Bundle, install, and run JavaScript & TypeScript — all in Bun. Bun is a fast JavaScript runtime & toolkit with a bundler, test runner, and npm-compatible package manager built in.
Runtime, package manager, test runner and bundler in a single binary. Use bun install or bun test in an existing Node.js project, or run the whole thing on Bun. bun install and bun test drop into existing Node.js projects. No runtime switch required. Runs JavaScript & TypeScript on JavaScriptCore. Node.js APIs, node_modules and your framework work as-is. npm-compatible, up to 30× faster. Workspaces, catalogs, overrides, patches and a lockfile you can read. Jest-compatible expect(), mocks, snapshots, DOM and coverage — starting in milliseconds. TS, JSX, CSS & HTML for browsers and servers. Dev server with HMR. Single-file executables. Install, develop, run, test and ship with the same tool.…from bun.com
Does a similar job
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Nub – A Bun-like all-in-one toolkit for Node.jsJun 2026 · github.com · ▲277Colin here, creator of Nub. I’ve had the general shape of this in mind for years. Nub runs your code with stock `node`, augmented with a `--require` preload hook[0] that adds a transpiler (oxc-powered, packaged as a Node-API add-on), registers a module resolution hook[1], and injects polyfills as needed for APIs like `Worker`, `Temporal`, etc. All purely additive, your code ultimately runs using Node’s actual engine & stdlib implementations. [0] https://nodejs.org/api/cli.html#-require-module [1]…
Crust – A CLI framework for TypeScript and BunMar 2026 · github.com · ▲95We've been building Crust (https://crustjs.com/), a TypeScript-first, Bun-native CLI framework with zero dependencies. It's been powering our core product internally for a while, and we're now open-sourcing it. The problem we kept running into: existing CLI frameworks in the JS ecosystem are either minimal arg parsers where you wire everything yourself, or heavyweight frameworks with large dependency trees and Node-era assumptions. We wanted something in between. What Crust does differently: - Full type inference from definitions — args and flags are inferred automatically. No…
Knitting – A shared-memory concurrency runtime for Node.js,Bun,and Deno8d ago · js.knitting.run · ▲12A zero-dependency concurrency runtime for Node.js, Deno, and Bun. Run typed JavaScript tasks on threads or isolated processes without blocking the main thread.
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