Anthropic has acquired the dev tools startup used by OpenAI, Google, and Cloudflare
techcrunch.com May 19, 2026

Anthropic has acquired the dev tools startup used by OpenAI, Google, and Cloudflare

AI-summarised brief · reviewed before publication

Anthropic has acquired Stainless, a dev tools startup founded by former Stripe engineer Alex Rattray, for an undisclosed amount. Stainless' software is used by rival AI labs, including OpenAI and Google, to automate the creation and maintenance of software development kits. The acquisition will take a key infrastructure supplier out of competitors' hands. Anthropic will wind down hosted Stainless products, but customers will retain ownership and rights to modify generated SDKs. Stainless' technology is valuable for companies building AI agents that connect to external software. The deal's terms were not disclosed, but The Information reported it to be over $300 million.

💡 Why It Matters

  • · By acquiring Stainless, Anthropic gains a strategic advantage over its competitors, limiting their access to crucial SDK tools.
  • · This move secures a key infrastructure component for Anthropic's AI development.