Google has joined Microsoft and Amazon in reassuring customers that Anthropic's AI models, including Claude, will remain available for non-defense work—even after the Pentagon officially blacklisted the startup as a supply chain risk.

"We understand that the Determination does not preclude us from working with Anthropic on non-defense related projects, and their products remain available through our platforms, like Google Cloud," a Google spokesperson said on Friday, as first reported by CNBC.The statement came a day after Microsoft became the first major cloud provider to offer similar assurances, telling customers that its lawyers had reviewed the designation and concluded that Claude can stay embedded across M365, GitHub, and Microsoft's AI Foundry.

Amazon followed, confirming that AWS customers and partners can keep using Claude for all workloads not tied to the Department of War.

Pentagon's supply chain risk tag—usually reserved for foreign adversaries—now targets an American AI startup

The Defense Department formally designated Anthropic a supply chain risk on Thursday after the company refused to grant unrestricted access to its technology for applications it deemed unsafe—specifically mass surveillance and fully autonomous weapons. The designation, typically aimed at foreign adversaries, means the Pentagon will transition Claude off its systems and require any contractor working with the department to certify they don't use Anthropic's models.

Anthropic CEO Dario Amodei responded by saying the company has "no choice" but to challenge the move in court. He also clarified that the designation applies narrowly—only to the use of Claude as a direct part of contracts with the Department of War, not to all customers who happen to hold such contracts.

All three major cloud providers now back Anthropic's commercial availability

The unified messaging from Microsoft, Google, and Amazon matters because Anthropic's models are deeply woven into all three cloud ecosystems.

Claude is available through Google Cloud's Vertex AI, AWS Bedrock, and Microsoft's AI Foundry. Google is also one of Anthropic's biggest financial backers, having invested over $3 billion and reportedly in talks to pour in more—potentially pushing Anthropic's valuation to $350 billion, according to Business Insider.

Amazon's $8 billion stake has ballooned to over $60 billion in value.

Some defense firms have already started migrating away from Claude

Despite the cloud giants' reassurances, the ripple effects are real. CNBC reported that some defense technology companies have already told employees to stop using Claude and switch to alternatives, including from rival OpenAI—which announced its own classified Pentagon deal shortly after Anthropic's talks with the department collapsed. Meanwhile, Anthropic's consumer growth has continued to surge in the wake of the standoff, suggesting the brand fallout may be limited to the defense sector for now.