Anthropic in Talks to Buy Developer Tools Startup Used by OpenAI, Google
$300M+. Anthropic is quietly acquiring the developer tools layer that OpenAI and Google also depend on.
Why it matters
Anthropic is consolidating the AI agent infrastructure stack by acquiring Stainless, a critical but overlooked layer that enables model access for both enterprise and autonomous systems. This signals a strategic shift toward controlling end-to-end AI product ecosystems rather than competing purely on model capability.
The key facts
5 to knowAnthropic in advanced talks to acquire Stainless for $300M+
Stainless is 4 years old, serves OpenAI, Google, and Anthropic
Stainless provides developer tools for faster AI model access
High demand driven by AI agents (Claude Code, OpenClaw) automation use cases
Deal would give Anthropic control over developer tooling layer used by competitors
Go to the source
The Informationtheinformation.com
Publisher excerpt: Anthropic is in advanced talks to acquire developer tools startup Stainless for at least $300 million, according to a person with knowledge of the deal. The four-year-old Stainless sells software to model makers including Anthropic, OpenAI and Google that helps developers, non-technical people and…