Anthropic Acquires Bun as Claude Code Hits $1B Milestone
▼ Summary
– Claude Code, an AI model for developers, reached $1 billion in run-rate revenue just six months after its public launch in May 2025.
– Anthropic is acquiring Bun, a fast, all-in-one JavaScript runtime and toolkit, to accelerate the development of Claude Code.
– The acquisition aims to provide Claude Code users with faster performance, improved stability, and new capabilities.
– Bun is a widely adopted tool with over 7 million monthly downloads and is used by companies like Midjourney to increase productivity.
– Following the acquisition, Bun will remain open source and MIT-licensed, with continued investment in its development.
For developers, startups, and major corporations seeking the most advanced AI tools, Claude Code has established itself as a transformative force in agentic software development. This platform has not only redefined how teams approach building software but has also demonstrated remarkable commercial success, hitting a $1 billion run-rate revenue milestone a mere six months after its public launch. To build upon this explosive growth and further enhance its capabilities, Anthropic has announced the strategic acquisition of Bun, a groundbreaking JavaScript runtime that is reshaping modern development with its exceptional speed and integrated toolkit.
Bun has rapidly become indispensable infrastructure for AI-driven engineering. Founded by Jarred Sumner, it delivers performance that significantly outpaces its competitors. By combining a runtime, package manager, bundler, and test runner into a single, cohesive toolkit, Bun empowers developers to build and test applications at a previously unimaginable pace. Its focus on optimizing for reliability, speed, and an overall delightful experience has made it a favorite within the JavaScript and TypeScript communities.
This acquisition promises direct benefits for users of Claude Code, including faster performance, greater stability, and access to new, integrated capabilities. The partnership is a natural evolution of a collaboration that has been deepening for months. Bun’s technology was already instrumental in scaling Claude Code’s infrastructure as it grew from an internal experiment into a critical tool for global leaders like Netflix, Spotify, KPMG, L’Oreal, and Salesforce. The recent launch of Claude Code’s native installer was a direct result of this joint work.
Anthropic’s Chief Product Officer, Mike Krieger, emphasized the strategic fit, noting that Bun embodies the technical excellence the company seeks. He highlighted that the Bun team rebuilt the JavaScript toolchain from first principles without losing sight of practical applications. Bringing this team into Anthropic is seen as a crucial step to build the infrastructure needed to sustain Claude Code’s incredible momentum and keep up with the breakneck speed of AI adoption across industries.
The underlying infrastructure for AI-assisted development is more critical than ever, and Bun has solidified its role as an essential component. Its impressive adoption metrics, including over 7 million monthly downloads and more than 82,000 GitHub stars, alongside use by companies like Midjourney and Lovable, underscore its impact on developer speed and productivity.
This move reflects Anthropic’s disciplined approach to growth, focusing on acquisitions that strengthen its technical leadership, reinforce its position in the enterprise AI sector, and remain aligned with its core principles. Bun will be a foundational piece in constructing the infrastructure for the next generation of software development. Importantly, Bun will remain an open-source project under its MIT license, with continued investment to ensure it stays the preferred choice for JavaScript and TypeScript developers worldwide.
Together, Anthropic and Bun are poised to make Claude the definitive platform for coders and professionals who depend on AI for their most important work.
(Source: Anthropic)
