Anthropic acquires Stainless for $300M, pulling key developer tools from OpenAI and Google
Anthropic has acquired Stainless, the SDK generation startup used by OpenAI, Google, and Cloudflare, for over $300 million. The deal removes a critical infrastructure supplier from competitors' hands as Anthropic winds down all hosted Stainless products by September 2026, forcing rivals to find alternative tooling solutions.