Anthropic in Advanced Talks to Acquire Developer Tools Startup Stainless for at Least $300 Million

Anthropic is in advanced talks to acquire Stainless, a four-year-old developer tools startup, for at least $300 million as of May 13, 2026. Stainless sells software that helps developers and non-technical people, with customers including Anthropic, OpenAI, and Google. The acquisition would bring the developer tools company in-house for the AI firm.

Stainless acquisition talks

• ▪Stainless is four years old as of May 13, 2026.
• ▪Anthropic is in advanced talks to acquire Stainless for at least $300 million as of May 13, 2026.

Stainless product offerings

• ▪Stainless sells software that helps developers and non-technical people.
• ▪Stainless's customers include Anthropic, OpenAI, and Google.

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