Bun is an open-source project built for javaScript and TypeScript developers.

Yes — Bun is open source under the Open Source license and free to use.

What platforms does Bun run on?

Bun runs on the web and the command line. It can also be self-hosted.

The GitHub repository shows 1.1k commits in the last 90 days.

Bun is developed by Jarred Sumner.

Yes — Bun is open source under the Open Source license.

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Bun

Name: Bun
Author: Jarred Sumner

bun.shInfrastructure

Bun is an open-source JavaScript runtime that includes a native bundler, transpiler, test runner, and npm client. It aims to improve developer productivity by offering fast installs, efficient builds, and a unified toolkit for JavaScript and TypeScript development.

Open SourceWebCLISelf-hosted

Visit bun.sh

93.5kstars

4.7kforks

1alternative

7features

2021since

Overview

7 features

In the Frameworks & SDKs space, Bun takes a focused approach. It focuses on providing a fast, all-in-one JavaScript runtime and toolkit for developers to build, test, and run applications efficiently. Bun is an open-source project aimed at javaScript and TypeScript developers. The project is open source (Open Source). Bun is available on the web and the command line, and it can be self-hosted.

Jarred Sumner builds and maintains Bun, and it first shipped in 2021. The project is developed in the open on GitHub with 93.5k stars and 1.1k commits in the last 90 days. Key capabilities include javaScript runtime, bundler, and transpiler.

Summary written by a language model from the project’s public pages.

JavaScript runtime
Bundler
Transpiler
Test runner
npm client
Fast installs
Native REPL

Built with & integrations

Framework

React

Hosting

VercelCloudflare

Connectors

github

Runs on

BrowserCLISelf-hosted

Detected from

Vercel: x-vercel-id header · x-vercel-cache header
Cloudflare: cf-ray header · cf-cache-status header

Trust & compliance

License

Open Source

Verified signals

HTTPSOpen SourceFree tierActive maintenance

Indexing history

What PulseGate has recorded for this listing

Indexed28 Jun · 12:54 UTC
Listing verified against its public source
Source: PulseGate · Open

Frequently asked questions about Bun

What is Bun?: Bun focuses on providing a fast, all-in-one JavaScript runtime and toolkit for developers to build, test, and run applications efficiently. It is catalogued under Frameworks & SDKs on PulseGate.
Who is Bun for?: Bun is an open-source project built for javaScript and TypeScript developers.
Is Bun free?: Yes — Bun is open source under the Open Source license and free to use.
What platforms does Bun run on?: Bun runs on the web and the command line. It can also be self-hosted.
Is Bun still active?: The GitHub repository shows 1.1k commits in the last 90 days.
Who makes Bun?: Bun is developed by Jarred Sumner.
How long has Bun been around?: Bun first shipped in 2021.
Is Bun open source?: Yes — Bun is open source under the Open Source license.

At a glance

Platforms: API · CLI · Web
Languages: English
License: Open Source
Built for: JavaScript and TypeScript developers
Model: Open source
Solves: Providing a fast, all-in-one JavaScript runtime and toolkit for developers to build, test, and run applications efficiently.

Developer

Jarred Sumner

Community-driven

Open source

Stars: 93,503
Forks: 4,748
Open issues: 6,782
Last commit: 28 Jun 2026
Commits 90d: 1,080
Contributors: 924
Authorship: Community-driven
Default branch: main
Latest release: bun-v1.3.14 · 13 May 2026

Index record

Indexed: 28 Jun 2026
Lifecycle: Alive
Last seen: 28 Jun 2026

Identity audit (12)

Slug: bun-a-fast-all-in-one-javascript-runtime-bun-sh
Lifecycle last checked: 8 Aug 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 28 Jun 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Canonical URL: https://bun.sh/

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