NextFin News - A federal judge in San Francisco has issued a preliminary injunction against Perplexity AI, ordering the startup to immediately halt the use of its "Comet" shopping agents on Amazon.com. The ruling, delivered on March 9, 2026, marks a decisive victory for the e-commerce giant in its effort to protect the integrity of its closed ecosystem from autonomous "agentic" software. U.S. District Judge Richard Seeborg ruled that Perplexity’s bots, which were designed to bypass traditional user interfaces to execute purchases and access Prime-only deals, likely violated the Computer Fraud and Abuse Act by exceeding authorized access to Amazon’s password-protected systems.
The legal confrontation centers on Comet, an AI-driven tool that Perplexity marketed as a frictionless way for consumers to find and buy products without ever visiting a retailer’s website. By automating the checkout process and scraping real-time pricing data, Comet effectively stripped Amazon of its ability to serve advertisements, suggest related products, or collect granular behavioral data from human shoppers. Amazon’s legal team argued that these bots were not merely "smart browsers" but invasive scripts that threatened the security of Prime accounts and the stability of the marketplace’s pricing algorithms. The court agreed, noting that the automated nature of the tool created a "non-human layer" that Amazon had a legitimate right to block under its terms of service.
For Amazon, the stakes extend far beyond technical trespassing. The company’s retail media business, which has become a high-margin juggernaut, relies entirely on human eyeballs lingering on search result pages. If AI agents like Comet become the primary interface for shopping, the multibillion-dollar value of "Sponsored Products" listings evaporates. Perplexity’s defense—that Amazon is simply trying to maintain a monopoly on the shopping experience to protect its ad revenue—failed to sway the court at this preliminary stage. The startup argued that its bots were acting as authorized proxies for consenting users, but the judge found that the automated bypassing of security measures like CAPTCHAs and login screens constituted a breach of digital boundaries.
This ruling sets a significant precedent for the burgeoning "agentic AI" economy. As startups race to build autonomous assistants that can book flights, manage calendars, and buy groceries, they are increasingly colliding with the "walled gardens" of Big Tech. The Amazon-Perplexity case suggests that the legal system is currently leaning toward the rights of platform owners to control how their data and services are accessed. While Perplexity CEO Aravind Srinivas has previously characterized the lawsuit as an attempt to stifle innovation, the court’s focus on "authorized access" provides a clear roadmap for other platforms like Walmart and eBay to shut out third-party AI agents that threaten their business models.
The immediate impact on Perplexity is a forced retreat from its most ambitious e-commerce feature. The company must now re-engineer Comet to operate within the strict confines of public-facing web data or negotiate formal API access with retailers—a move that would likely require sharing revenue or allowing Amazon to maintain its advertising grip. As U.S. President Trump’s administration continues to navigate the intersection of AI innovation and antitrust concerns, this judicial intervention highlights the growing friction between the "open web" aspirations of AI developers and the proprietary interests of the world’s largest digital marketplaces. The case will now proceed toward a full trial, but the preliminary injunction effectively kills the "buy-it-for-me" automation that was supposed to be Perplexity’s killer app for 2026.
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