By Sandy Carter
Publication Date: 2026-05-19 03:03:00
Anthropic Buys Stainless To Cut Off OpenAI And Google (Photo by Chesnot/Getty Images)
Getty Images
Anthropic just cut off a piece of infrastructure OpenAI and Google were quietly relying on. It did it by acquiring Stainless per TechCrunch.
On Monday, Anthropic announced it had acquired the developer tools startup founded by former Stripe engineer Alex Rattray. Terms were not disclosed, though prior reporting suggested a price north of $300 million. Stainless had been backed by Sequoia Capital and Andreessen Horowitz and was already embedded across the AI ecosystem.
Sequoia Capital and Andreessen Horowitz backed Stainless, the SDK. (Photo by Smith Collection/Gado/Getty Images)
Gado via Getty Images
Read the headline as another model war headline and you will miss what actually happened. This was an infrastructure move. More specifically, an infrastructure denial play.
Why Did Anthropic Acquire Stainless And What Is It?
Stainless sits at the exact point where AI becomes usable. It converts…
