capital
Anthropic has acquired the dev tools startup used by OpenAI, Google, and Cloudflare
May 18, 2026
Anthropic has acquired Stainless, the New York-based devtools startup founded in 2022 that automates the creation and maintenance of SDKs used by developers to interact with APIs. Stainless had become a prominent tool in the AI industry and was already used by OpenAI, Google, and Cloudflare, making the acquisition notable for how core API tooling is consolidating around major model companies.
Stainless, a New York-based startup, founded in 2022, rose to prominence in the emerging AI industry for automating the creation and maintenance of software development kits, or SDKs — the libraries developers use to interact with APIs.
Source: techcrunch.com