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

May 13, 2026

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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Anthropic in Talks to Buy Developer Tools Startup Used by OpenAI, Google — The Information

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

Stainless acquisition talks

Stainless product offerings

1 source

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

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Stainless product offerings

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