Anthropic has strategically taken a significant step by acquiring Stainless, an infrastructure asset that both OpenAI and Google have been using, as reported by TechCrunch.
On Monday, Anthropic revealed that it has acquired the developer tools company founded by Alex Rattray, a former engineer from Stripe. Although the financial details were not publicly disclosed, previous reports indicated that the acquisition price was likely over $300 million. Stainless has received backing from notable investors such as Sequoia Capital and Andreessen Horowitz and has become a key component within the AI landscape.
This acquisition is not merely another chapter in the competition between AI models; it represents a strategic infrastructure maneuver. Essentially, it's an infrastructure denial strategy that could reshape the competitive landscape.
So, what exactly is Stainless and why did Anthropic find it valuable? Stainless functions at the critical juncture where artificial intelligence becomes practical. It transforms APIs into production-ready software development kits (SDKs) across various programming languages, continuously updating them to keep pace with API changes. While this might seem like background work, it plays a crucial role in how seamlessly developers can integrate systems, data, and tools. For instance, a cardiologist who won Anthropic's hackathon leveraged this technology in his project. In a field where the potential of AI agents relies on their accessibility to various systems, Stainless is much more than basic infrastructure—it provides extensive access.
In the realm of AI product development, the capabilities of agents are intrinsically linked to the systems they can interact with, and that accessibility is determined by SDKs. Stainless adeptly transforms API specifications into ready-to-use SDKs in languages such as Python, TypeScript, Go, and Java, ensuring they remain up-to-date as APIs evolve. Its understated yet fundamental nature makes it an essential tool for companies like OpenAI, Google, Cloudflare, Replicate, and Runway, which utilized it to keep their systems up-to-date without the need for extensive internal development.
Now, with this acquisition, Anthropic has claimed ownership of this vital infrastructure. They plan to discontinue the hosted product for other companies, although existing customers will retain access to what they have already generated. The fact that Anthropic has taken control of this SDK management engine could have significant implications for its competitors. This move is particularly noteworthy, given OpenAI's own journey; the company originally developed its SDK tools in-house, later adopting Stainless when the complexity of maintaining these tools became unmanageable. What Anthropic has acquired was already integral to the workflows of its rivals.
