Published on
May 13, 2026
Anthropic Initiates Acquisition Talks for Developer Tools Startup Stainless
Anthropic is reportedly in talks to acquire developer tools startup Stainless for at least $300 million.
Anthropic is reportedly in discussions to acquire developer tools company Stainless in a deal valued at a minimum of $300 million, according to information shared by a source familiar with the matter and reported by The Information on May 12.
Founded four years ago, Stainless specializes in software that leverages AI to automatically generate software development kits (SDKs). These SDKs enable developers to more efficiently interact with AI model APIs offered by companies such as Anthropic, OpenAI, and Google. The startup’s tools have gained traction alongside the growing adoption of AI-powered agents like Claude Code and OpenClo.
A Strategic Move for Anthropic
Acquiring Stainless would give Anthropic control over a vital resource for accessing AI models from competitors like OpenAI and Google. OpenAI, which previously maintained its own SDK, transitioned to using Stainless due to the challenges of ongoing maintenance and the high resource demands. Additionally, Stainless has developed software specifically designed to integrate with Anthropic’s Model Context Protocol (MCP), which was launched in November 2024.
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Ongoing Negotiations
While the deal is still under negotiation, and terms may yet change, the source indicated that part of the $300 million acquisition price might be paid in Anthropic’s own shares. The finalization of the agreement remains uncertain at this stage.
A Pattern of Acquisitions
Anthropic has been increasingly active in the mergers and acquisitions space over the past six months. Starting with its acquisition of developer tools startup Bun in December of last year, the company proceeded to purchase computer usage startup Vercept and AI biotech company Coefficient Bio in quick succession. Anthropic’s recent activity suggests an ongoing strategy to expand its capabilities across a range of sectors, including financial services, healthcare, and cybersecurity.
This potential deal with Stainless, if successful, would mark another significant step in Anthropic’s efforts to strengthen its position in the competitive AI landscape. However, as no agreement has been finalized, further developments are awaited to clarify the future of these talks.
