Bun Coupon: Free & Open Source

Deal Highlights

What is Bun?

Bun is an all-in-one JavaScript toolkit that replaces Node.js, npm, webpack, and Jest with a single ultra-fast binary. Built from scratch in Zig with a focus on performance, Bun delivers 25x faster package installs, 4x faster test execution, and near-instant server startup — fundamentally changing the speed at which JavaScript developers work.

For startups where developer productivity directly impacts shipping velocity, Bun eliminates the minutes of waiting that accumulate across npm installs, build steps, and test suites throughout the day. Those minutes compound into hours of recovered engineering time every week.

Key Features for Startups

Package management runs 25x faster than npm. A fresh install of a typical Next.js project takes 30 seconds with npm and 1.2 seconds with Bun. This is not a cherry-picked benchmark — it is the consistent experience across real-world projects. CI pipelines that install dependencies become dramatically faster.

The JavaScript runtime is a drop-in Node.js replacement. Express, Fastify, Hono, and most npm packages work without changes. Your existing Node.js application runs on Bun by changing the runtime command — no code rewrite needed.

Built-in bundler replaces webpack, esbuild, and Rollup for building production JavaScript bundles. Bundle your frontend and backend code with a single tool that is already installed.

Built-in test runner replaces Jest and Vitest with a Jest-compatible API. Write tests the same way, run them 4x faster. Compatible with existing test files that use describe, it, expect patterns.

Native TypeScript execution runs .ts files directly without a compilation step. No ts-node, no tsconfig for running scripts, no build step between writing TypeScript and executing it.

SQLite built into the runtime provides an embedded database without installing additional packages. Perfect for local development, testing, and applications that need simple persistent storage.

Hot reloading with bun --watch restarts your server in milliseconds when files change. Development iteration becomes instant.

Who Should Use Bun?

JavaScript/TypeScript developers who want faster tooling across the entire development lifecycle. Startups with CI pipelines where npm install and test execution dominate build times. Teams starting new projects that want a modern, fast foundation. Developers frustrated with the complexity of configuring webpack, babel, and TypeScript together.

Bun vs Node.js

Node.js has the largest ecosystem with 2M+ npm packages and 15+ years of production battle-testing. Bun is dramatically faster but newer with occasional compatibility gaps on edge-case npm packages. For new projects, Bun is compelling — you get Node.js compatibility with significantly better performance. For existing production apps, test compatibility before switching.

Bun vs Deno

Deno focuses on security (sandboxed permissions) and web standards. Bun focuses on speed and Node.js compatibility. Deno rethinks JavaScript from first principles. Bun accelerates the existing JavaScript ecosystem. Deno for security-first applications. Bun for maximum performance with existing code.

Bun vs esbuild

esbuild is a fast bundler. Bun includes a bundler plus a runtime, package manager, and test runner. esbuild for adding fast bundling to an existing setup. Bun for replacing the entire JavaScript toolchain.

How to Claim This Deal

1. Install Bun: curl -fsSL https://bun.sh/install | bash
2. Replace npm with bun in your existing project
3. Run bun install and watch dependencies install in seconds
4. Use bun run, bun test, and bun build for everything

Pricing Overview

Bun is completely free and open-source under the MIT license. No paid plans, no commercial restrictions. Funded by Oven, the company behind Bun, through venture capital.

Who Is This Deal For?

Frequently Asked Questions

Everything you need to know about this startup deal.