Anthropic is reportedly in advanced talks to acquire developer tools startup Stainless for more than $300 million, according to multiple industry reports. Stainless builds SDK generation and API integration software used by major AI companies including OpenAI, Google, and Anthropic itself.
The acquisition would strengthen Anthropic’s enterprise AI infrastructure strategy by improving developer onboarding, API accessibility, and agentic workflow tooling. Analysts believe the move could also give Anthropic greater control over critical AI developer infrastructure layers increasingly used across the industry.
The deal reflects growing competition among frontier AI companies to expand beyond foundation models into the broader ecosystem of tooling, deployment infrastructure, and enterprise developer experience platforms.
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