Anthropic makes first acquisition with purchase of Bun to accelerate Claude Code - SiliconANGLE

"Founded in 2019, Bun offers an all-in-one JavaScript/TypeScript toolkit that aims to simplify and accelerate full-stack development. The company's offering is similar in purpose to Node.js but also includes tools developers usually pull in separately, including a package manager, a bundler, a test runner and script runner, all shipped as a single executable. Bun is built using the Zig programming language and leverages Apple's JavaScriptCore under the hood to yield much faster startup times and lower memory usage compared with runtimes based on the V8 engine, the engine used by Node.js and others."

"Bun is often significantly faster in key developer workflows, such as package installation, build/bundling, test execution and runtime, making it appealing to Anthropic. The tools provided by Bun are broadly compatible with existing Node.js code and support many Node core application programming interfaces, such as file system, path and networking, along with resolving modules that work in a way similar to Node's module resolution. Bun could be described as a super charged version of Node.js."

""Bun represents exactly the kind of technical excellence we want to bring into Anthropic," Chief Product Officer Mike Krieger said in an announcement post. "Claude Code reached $1 billion in run-rate revenue in only 6 months and bringing the Bun team into Anthropic means we can build the infrastructure to compound that momentum and keep pace with the exponential growth in AI adoption.""

Anthropic acquired developer tools startup Bun to integrate its all-in-one JavaScript/TypeScript toolkit into Anthropic's infrastructure. Bun packages a runtime, package manager, bundler, test runner and script runner into a single executable. Bun is implemented in Zig and uses Apple's JavaScriptCore to deliver faster startup times and lower memory usage compared with V8-based runtimes. Bun often outperforms Node.js in package installation, build/bundling, test execution and runtime workflows while remaining largely compatible with Node.js core APIs and module resolution. The acquisition aims to boost performance, stability and capabilities for Claude Code and support scaling infrastructure amid rapid growth.

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