Amazon Sues Perplexity Over AI Shopping Agent That Secretly Accessed Customer Accounts

Amazon has filed a lawsuit against Perplexity AI, accusing the fast-growing startup of illegally accessing Amazon customer accounts through its automated “agentic” shopping feature. The complaint, filed Tuesday in a U.S. District Court in California, claims Perplexity’s Comet browser and AI agent disguised automated activity as human browsing to place orders on behalf of users.

The dispute marks a major flashpoint in the debate over regulating AI “agents” — autonomous digital assistants that can navigate websites, make purchases, and perform other online tasks on users’ behalf. Amazon said Perplexity’s technology posed security risks and had repeatedly ignored requests to stop unauthorized activity on its platform.

“Perplexity’s misconduct must end,” Amazon said in its filing, adding that the startup’s software “purposely disguised its automated activity” and that its actions were “no less unlawful” than a physical break-in.

Perplexity, whose AI tools have surged in popularity amid the rise of conversational assistants, previously dismissed Amazon’s complaints, calling them an attempt to stifle innovation and protect its ad-driven business model. “Bullying is when large corporations use legal threats to block innovation,” the startup said in an earlier blog post.

Amazon argued that Perplexity’s AI agent interfered with its ability to deliver a personalized shopping experience, undermining systems built over decades. The company added that third-party apps making purchases for users must act transparently and respect site policies.

Perplexity said its Comet AI assistant allows users to shop and compare products autonomously, while keeping login credentials stored locally, not on company servers. It argued that consumers have the right to choose their own AI shopping tools — a stance that could shape future legal battles over the limits of AI automation in e-commerce.