Amazon Wins Legal Battle Against Perplexity's AI Shopping Tool

Federal judge blocks AI assistant from accessing Amazon's website, citing cybersecurity concerns

Mar. 14, 2026 at 1:52am by Ben Kaplan

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In a landmark ruling, a federal judge has granted Amazon's request to block Perplexity AI's shopping assistant tool, Comet, from accessing the retail giant's website. The decision marks a significant escalation in the ongoing tension between traditional online retailers and emerging AI-powered shopping technologies. The court found that while Perplexity's tool operates with permission from individual Amazon users, it lacks the necessary authorization from Amazon itself to access password-protected accounts, raising serious questions about data security protocols.

Why it matters

This case highlights the complex legal landscape surrounding AI agents that act on behalf of consumers. As artificial intelligence becomes increasingly integrated into everyday online activities, questions about authorization, transparency, and data security will likely become more frequent and contentious. The ruling could establish important precedents for how AI companies design and deploy shopping assistants going forward.

The details

The legal confrontation between Amazon and Perplexity centers on whether AI-powered shopping assistants must play by the same rules as human users when navigating commercial websites. Amazon contends that Perplexity's Comet tool deliberately masked its identity, making the AI agent appear as a human customer using Google Chrome rather than disclosing its automated nature. The court found that Amazon's concerns about potential cybersecurity risks outweighed Perplexity's claims about losing its competitive edge in the AI shopping space.

  • The federal judge's ruling was issued on March 14, 2026.

The players

Amazon

An American multinational technology company that focuses on e-commerce, cloud computing, digital streaming, and artificial intelligence.

Perplexity AI

A San Francisco-based startup that has developed the Comet AI shopping assistant tool, which is valued at approximately $21 billion and backed by high-profile investors including soccer star Cristiano Ronaldo.

Judge Maxine Chesney

The senior U.S. District Judge who presided over the case and granted Amazon's request to block Perplexity's Comet tool from accessing the retail giant's website.

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What they’re saying

“We must not let individuals continue to damage private property in San Francisco.”

— Robert Jenkins, San Francisco resident (San Francisco Chronicle)

What’s next

The preliminary injunction allows Perplexity to continue operating its Comet tool on other retail websites while preventing it from accessing Amazon's platform. This compromise ensures the company can maintain its first-mover advantage in the AI shopping space while addressing Amazon's immediate security concerns.

The takeaway

This case highlights the complex legal landscape surrounding AI agents that act on behalf of consumers. As artificial intelligence becomes increasingly integrated into everyday online activities, questions about authorization, transparency, and data security will likely become more frequent and contentious. The ruling could establish important precedents for how AI companies design and deploy shopping assistants going forward.