Developer tools

Bun

Website
Founded 2019Origin source ↗Checked 2026-09-15

Overview

Bun is an incredibly fast all-in-one toolkit for building, installing, running, and testing JavaScript and TypeScript. We were born out of frustration with the fragmented, slow JavaScript ecosystem and are on a mission to make JavaScript development faster and more productive.

Company description As recorded 2026-11-08
LinkedIn GitHub
Developer toolsInfrastructureDevelopersDevelopersOpen source commercial

Founders & team

Previously Codeblog, Webthing

Company history As recorded 2026-11-08

Jarred Sumner

Founder

Bun is an all-in-one JavaScript runtime, bundler, package manager, test runner. We're making JavaScript faster. Our current goal is to replace Node.js as the default JavaScript runtime.

LinkedIn X
Founder profile As recorded 2026-09-15
13team members reported
Source-reported As recorded 2026-09-15

Founded 2019 · Source

News & product activity

Sources & observations

Y Combinator

Profile depthenriched profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedSan Francisco, CA, USA
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 3 of 6 areas documented

Source-based assessment · automated evidence rules

The source reports an inactive or acquired company; current product identity needs review.

Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.

Stage definitions
independent websitesource corroborationreachable websitedescriptive evidenceclassified market and modelsourced peoplesourced founding yeardocumentation observed
startup.observe Directory coverage · Sources & method