---
title: "Anthropic acquires Bun as Claude Code hits $1B"
description: "Anthropic announced the acquisition of Bun, a JavaScript runtime, as Claude Code reached $1 billion in run-rate revenue six months after becoming publicly available. Bun is an all-in-one toolkit that combines a runtime, package manager, bundler, and test runner, and the post says its focus on speed, reliability, and developer experience has made it important to Claude Code’s infrastructure. The companies had collaborated for months, with Bun helping scale Claude Code and contributing to its native installer; Anthropic says the acquisition will bring faster performance, improved stability, and new capabilities. Bun will remain open source and MIT-licensed, while Anthropic continues investing in its JavaScript and TypeScript tooling, which has more than 7 million monthly downloads and over 82,000 GitHub stars."
---

# Anthropic acquires Bun as Claude Code hits $1B

[Anthropic](https://yomu.fyi/company/anthropic) · Sep 10, 2026

**Type:** Announcement

## Summary

Anthropic announced the acquisition of Bun, a JavaScript runtime, as Claude Code reached $1 billion in run-rate revenue six months after becoming publicly available. Bun is an all-in-one toolkit that combines a runtime, package manager, bundler, and test runner, and the post says its focus on speed, reliability, and developer experience has made it important to Claude Code’s infrastructure. The companies had collaborated for months, with Bun helping scale Claude Code and contributing to its native installer; Anthropic says the acquisition will bring faster performance, improved stability, and new capabilities. Bun will remain open source and MIT-licensed, while Anthropic continues investing in its JavaScript and TypeScript tooling, which has more than 7 million monthly downloads and over 82,000 GitHub stars.

## Context

Claude Code reached $1 billion in run-rate revenue six months after becoming available to the public, while Bun had become important infrastructure for scaling Claude Code. Anthropic says the acquisition supports its focus on technical excellence, enterprise AI, and infrastructure for the next generation of software.

## Approach / What changed

Anthropic is acquiring Bun and bringing its team into the company. Bun will remain open source and MIT-licensed, while Anthropic continues investing in its runtime, bundler, package manager, and test runner and integrating new workflows into Claude Code.

## Takeaways

- Claude Code reached $1 billion in run-rate revenue six months after becoming available to the public.
- Bun combines a JavaScript runtime, package manager, bundler, and test runner in one toolkit.
- Bun will remain open source and MIT-licensed after the acquisition, with Anthropic promising continued investment in JavaScript and TypeScript tooling.

**Tags:** [Bun](https://yomu.fyi/topic/bun), [Claude Code](https://yomu.fyi/topic/claude-code), [JavaScript](https://yomu.fyi/topic/javascript), [TypeScript](https://yomu.fyi/topic/typescript)

- Source: [Anthropic](https://www.anthropic.com/news/anthropic-acquires-bun-as-claude-code-reaches-usd1b-milestone)
- Source URL: https://www.anthropic.com/news/anthropic-acquires-bun-as-claude-code-reaches-usd1b-milestone
- Ingested by Yomu: 2026-09-10T20:04:35.120Z

[Read original post](https://www.anthropic.com/news/anthropic-acquires-bun-as-claude-code-reaches-usd1b-milestone)