Amazon Sues Perplexity Over AI Shopping Agent

Amazon filed a lawsuit on Tuesday, November 4, 2025, against Perplexity AI, demanding the startup prevent its Comet browser from making purchases on Amazon's platform. The lawsuit, filed in San Francisco federal court, accuses Perplexity of committing computer fraud by disguising its AI agents as human shoppers and violating Amazon's terms of service. Perplexity has fired back, calling Amazon's actions "bullying" and arguing that the e-commerce giant is using legal intimidation to block innovation and protect its lucrative advertising business.

The dispute centers on Comet, Perplexity's AI-powered browser that launched in July 2025 and rolled out globally in October. Comet allows users to instruct an AI assistant to find items, compare prices, and complete purchases on various websites, including Amazon without manual clicking. When users are logged into their Amazon accounts, Comet can quickly locate and purchase items, saving time for what Perplexity describes as "more important tasks." According to TechCrunch, Amazon sent multiple warnings before escalating to a cease-and-desist letter, stating that Comet was "violating Amazon's terms of service by not identifying itself as an agent."

Amazon's official statement argues that "third-party applications that offer to make purchases on behalf of customers from other businesses should operate openly and respect service provider decisions whether or not to participate." The company points to food delivery apps, delivery services, and online travel agencies as examples of applications that operate with consent from providers. Amazon claims Comet degrades the shopping experience by bypassing personalized recommendations, optimal delivery speeds, and features that make Amazon valuable to customers. According to Bloomberg, Amazon's lawsuit states: "Rather than be transparent, Perplexity has purposely configured its Comet AI software to not identify the Comet AI agent's activities in the Amazon Store."

Perplexity rejects these claims entirely. In a blog post titled "Bullying is Not Innovation," the company argues that user agents are fundamentally different from crawlers, scrapers, or bots. "A user agent is your AI assistant; it has exactly the same permissions you have, works only at your specific request, and acts solely on your behalf," Perplexity states. The company emphasizes that Comet stores user credentials securely on devices, never on Perplexity's servers, and operates entirely at the user's direction. Perplexity CEO Aravind Srinivas frames the dispute as a fight over user autonomy: "Today, Amazon announced it does not believe in your right to hire labor, to have an assistant or an employee acting on your behalf."

Behind the legal arguments lies a deeper conflict about the future of e-commerce. Perplexity accuses Amazon of prioritizing its advertising revenue over customer experience. "Amazon doesn't care. They're more interested in serving you ads, sponsored results, and influencing your purchasing decisions with upsells and confusing offers," the company wrote. When an AI agent is tasked simply with buying the cheapest laundry detergent, it skips the sponsored results, upsells, and confusing offers that generate revenue for Amazon. Amazon CEO Andy Jassy told investors last week that the company is "having conversations" and may ultimately partner with third-party AI agents, while also bragging about advertising's "return on advertising spend that's very unusual."

The timing is particularly sensitive for Amazon, which has its own AI shopping ambitions. The company demoed an AI shopping agent called "Buy for Me" in April 2025 and launched a shopping chatbot called Rufus in February 2025. Perplexity and Amazon agreed to pause agentic shopping on Amazon in November 2024, but when Comet was released, Perplexity allowed it again. By representing the Comet agent as a Chrome browser user rather than a bot, Amazon alleges Perplexity tried to circumvent the agreement. Coincidentally, Amazon founder Jeff Bezos invested in Perplexity last year through his Bezos Expeditions Fund, adding a layer of irony to the conflict.

What This Means for the Future of AI Commerce

This lawsuit is far more than a dispute between two tech companies; it represents the opening salvo in a war over the future of how we shop, browse, and interact with the internet. Amazon's cease-and-desist marks one of the first formal challenges to how AI browsers operate when they search, click, and shop online. According to PPC Land, Amazon and Shopify collectively control more than 50 percent of the United States e-commerce market and currently block AI agents to maintain discovery ownership and protect retail media businesses.

The legal landscape remains uncertain. Eric Goldman, a law professor at Santa Clara University, told The Register: "Distinguishing between web browsing, scraping, and agentic AI access is going to be extremely difficult for the law." Goldman compared the situation to carriage contract battles between cable TV companies and broadcasters: "It's like one of those things where both sides are going to have to bleed before they realize that they're better off working together." He noted that services can restrict how users disclose their credentials in terms of service, though users may find it useful to have services acting as proxies on their behalf, similar to financial apps that access bank data.

Consumer sentiment adds another dimension. According to a February 2025 survey of 1,026 US respondents by Omnisend cited by The Register, "66 percent of consumers refuse to let AI make purchases for them, even if it promises better deals." This suggests widespread skepticism about autonomous shopping, though interest may be growing as AI capabilities improve. Security researchers have also identified vulnerabilities. LayerX Security discovered in August 2025 that Comet faced prompt injection vulnerabilities that could exfiltrate emails, calendar data, and connected service information. Brave researchers found additional vulnerabilities in October 2025 involving unseeable prompt injections embedded within images. According to PPC Land, Perplexity allegedly responded that it saw "no security impact" to the initial disclosures.

Amazon has already taken steps in recent months to prevent external AI agents from crawling its website, including those developed by OpenAI, Google, and Meta. The company blocked Perplexity's crawlers in August 2025, signaling its intention to control how AI systems access its platform. As users increasingly outsource shopping, booking, and browsing to AI agents, websites must decide whether to fully block these bots, force them to comply with specific rules, or risk losing control over their carefully optimized, ad-supported environments. Amazon's statement suggests openness to agentic experiences that operate transparently and enhance customer value, but the company insists on maintaining the ability to decide which agents can access its platform.

Perplexity maintains it will not be intimidated. The company emphasized that users demand agentic shopping experiences and argued that Amazon's current size resulted from delivering good products at low prices with fast delivery—principles that align with the natural evolution toward AI-powered commerce. "Amazon shouldn't forget what it's like to be our size and passionate about a world-changing product," Perplexity wrote. The company is not alone in betting on AI commerce. According to TechCrunch, other agentic browsers include OpenAI's ChatGPT Atlas (which introduced an "Instant Checkout" feature in September), BrowserOS, and Opera Neon.

The confrontation between Amazon and Perplexity is an early signal that the great AI web browser war has officially begun. As Android Headlines notes, this situation could set a crucial precedent for the future. The outcome will determine whether users have the right to choose their own AI assistants, or whether platforms retain the power to block agents they view as threats to their business models. For now, the dispute remains unresolved, with both sides dug in and the future of autonomous commerce hanging in the balance.