Bun
AcquiredYC S19San Francisco, US · Founded 2019 · 13 employees · 2 known investors
Bun is a JavaScript and TypeScript toolkit that includes a runtime, bundler, test runner, and package manager designed to be compatible with Node.js projects. It can be adopted incrementally as individual tools or as a complete stack.
Also known as Codeblog · Webthing
Data & InfrastructureDeveloper ToolsEnterprise SoftwareOpen SourceUnited States of AmericaAmerica / Canada
Founders & leadership· Y Combinator alumni (S19)
Bun was founded in 2019 by Jarred Sumner.
JS
Jarred Sumner𝕏FounderJarred Sumner is the founder of Bun, a JavaScript and TypeScript toolkit that provides a runtime, bundler, package manager, and test runner compatible with Node.js projects.
Investors · 2
In the news
Frequently asked questions
- What does Bun do?
- Bun is a JavaScript and TypeScript toolkit that includes a runtime, bundler, test runner, and package manager designed to be compatible with Node.js projects. It can be adopted incrementally as individual tools or as a complete stack.
- Who founded Bun?
- Bun was founded by Jarred Sumner in 2019.
- Who are Bun's investors?
- Bun's investors include Kleiner Perkins, Y Combinator.
- Where is Bun headquartered?
- Bun is headquartered in San Francisco, US.

