Amazon constructed a $68.6 billion promoting enterprise on a easy premise: buyers browse, and whereas they browse, they see advertisements. That premise is now on trial.

Perplexity AI filed a 96-page opening enchantment temporary with the USA Courtroom of Appeals for the Ninth Circuit on April 1, 2026, arguing {that a} preliminary injunction received by Amazon in March basically misapplies federal laptop fraud regulation. The case, numbered 26-1444, asks whether or not a 1984 statute designed to punish laptop hackers could be repurposed to dam AI purchasing assistants that customers voluntarily set up on their very own computer systems. If the Ninth Circuit sides with Perplexity, the ruling would strip Amazon of considered one of its strongest authorized instruments for preserving third-party AI brokers away from its market – and, critically, away from its promoting stock.

The monetary stakes aren’t summary. Amazon’s advertising revenue reached $21.3 billion in the fourth quarter of 2025 alone, rising 23 p.c year-over-year. For the complete 12 months, the phase generated $68.6 billion. CFO Brian Olsavsky famous through the This fall earnings name that promoting contributed greater than $12 billion of incremental income to Amazon throughout 2025. That cash flows primarily from Sponsored Merchandise and Sponsored Manufacturers – the advertisements buyers see once they seek for items on Amazon’s platform. Take away the patrons’ eyeballs, and the mannequin breaks.

What the lawsuit is definitely about

The dispute facilities on Perplexity’s Comet browser, a Chromium-based utility that features an elective AI assistant able to shopping web sites, discovering merchandise, and finishing purchases on behalf of customers. Perplexity launched Comet on July 9, 2025, initially proscribing entry to subscribers of its $200-per-month Max plan. The browser was made broadly available on October 2, 2025, after thousands and thousands joined a waitlist.

The Comet Assistant sits contained in the browser itself. Customers activate it by clicking a tab within the higher proper nook of the show. As soon as on, the assistant can navigate Amazon on the person’s route – trying to find merchandise, evaluating choices, and facilitating purchases. In response to the enchantment temporary, the assistant works by taking screenshots or HTML snapshots of the shopping session, sending encrypted variations to Perplexity’s servers for processing, after which receiving directions again. The screenshots are deleted inside 30 days. Perplexity’s servers by no means join on to Amazon’s computer systems.

That architectural element issues enormously. Amazon’s personal knowledgeable conceded within the district courtroom that there are “no direct requests from Perplexity hosts to Amazon.com” and that information travels from Amazon to the person’s browser first, then to Perplexity. The assistant can’t log right into a person’s Amazon account independently. For purchases, it requires further guide authorization from the person.

Why does Amazon care? As a result of when an AI assistant retailers on behalf of a person, it skips the advertisements. It bypasses sponsored product listings, suggestions, and different promoting placements that represent the majority of Amazon’s promoting income. The temporary alleges that Amazon’s true motivation is to establish and block the Comet Assistant so it could power “clients to view its ads” – a characterization drawn from Amazon’s personal inside complaints that advertisers don’t pay for his or her advertisements to be proven to automated brokers.

The $69 billion query

Amazon’s promoting enterprise has grown at a rare tempo. In Q1 2025, revenue reached $13.9 billion, a 19 p.c improve. By Q2, it climbed to $15.7 billion, up 22 p.c. Q3 delivered $17.7 billion, additionally rising 22 p.c year-over-year. And the fourth quarter posted the strongest efficiency of all, reaching $21.3 billion at 23 p.c development.

The acceleration is putting. Amazon is now the third-largest digital promoting platform globally, behind solely Meta and Alphabet. The Commerce Desk CEO Jeff Inexperienced famous throughout a November 7, 2025, earnings name that Amazon would probably generate roughly $70 billion in promoting for the 12 months, with roughly 90 p.c in Sponsored Listings competing immediately with Google Search and rising AI search platforms.

That 90 p.c determine illuminates the vulnerability. If the overwhelming majority of Amazon’s advert income comes from search-based sponsored listings – the sort that seem when a human person varieties a question into Amazon’s search bar – then any know-how that replaces human shopping with AI-assisted purchasing immediately threatens the enterprise mannequin. An AI assistant doesn’t browse. It doesn’t scroll previous sponsored merchandise. It doesn’t get distracted by Amazon’s suggestion algorithms. It finds what the person requested for and facilitates the acquisition. In that transaction, promoting ceases to have a operate.

This isn’t a hypothetical concern. Amazon moved its AI-powered shopping prompts out of open beta on March 25, 2026, transitioning them to common availability in the USA and introducing CPC prices for AI-generated purchasing conversations. The choice to monetize these prompts got here after a free beta interval that started in November 2025. Amazon clearly sees AI-mediated purchasing as a development alternative – however solely when it controls the AI doing the mediating.

Amazon’s personal AI agent contradictions

The enchantment temporary raises a pointed commentary about Amazon’s conduct. Whereas suing Perplexity for deploying an AI purchasing agent, Amazon concurrently operates its personal. Amazon’s Rufus AI shopping assistant reached more than 300 million users throughout 2025 and generated nearly $12 billion in incremental annualized sales. Rufus can observe costs, monitor offers, and even full purchases autonomously by an auto-buy function. Customers who interact with Rufus full 60 p.c extra purchases throughout purchasing periods, based on Amazon’s personal metrics.

Extra telling is Amazon’s “Purchase for Me” function. Products available through Buy for Me grew from 65,000 at launch to over half a million, enabling Amazon’s AI to buy objects from third-party retailer web sites – usually with out these retailers’ data or permission. In response to the enchantment temporary, Amazon even listed Perplexity’s personal merchandise by Purchase for Me with out Perplexity’s consent.

The temporary frames this as an unclean arms argument: Amazon can’t invoke fairness whereas partaking in equal or worse conduct towards third events. Amazon blocks rivals’ AI brokers from its market whereas deploying its personal AI agent onto rivals’ web sites. The asymmetry is tough to reconcile.

The hacking regulation query

The authorized basis of Amazon’s case rests on the Pc Fraud and Abuse Act (CFAA), a statute Congress enacted in 1984 underneath the Counterfeit Entry System and Pc Fraud and Abuse Act. On the time, the regulation focused individuals who hacked into computer systems containing nationwide safety info or monetary information. Congress subsequently expanded the statute to cowl any “protected laptop” utilized in interstate commerce – which, within the web age, encompasses basically each laptop linked to the online.

Amazon claims Perplexity violated the CFAA by accessing its laptop programs with out authorization. The declare requires Amazon to determine 5 impartial components: that Perplexity deliberately accessed a pc, with out authorization or by exceeding licensed entry, thereby acquiring info from a protected laptop, with loss aggregating at the least $5,000 in a one-year interval.

The enchantment temporary argues Amazon can’t fulfill any of the 5 components, not to mention all of them.

On intentional entry, Perplexity attracts a pointy comparability. A Comet person accessing Amazon from her personal laptop, the temporary states, “is not any extra equal to Perplexity accessing Amazon than a Safari person accessing Amazon from her personal laptop is equal to Apple accessing Amazon.” Since Amazon sued solely Perplexity and never the customers, the corporate can’t set up that Perplexity itself accessed Amazon’s programs.

On authorization, the argument is that Amazon account holders licensed the Assistant to entry their very own info for their very own purchasing. No personal info past what the person can see within the browser window was transmitted. The assistant is, based on the temporary, functionally “akin to what an individual would see from wanting over the person’s shoulder.”

On the query of acquiring info from a protected laptop, the temporary is direct: Perplexity by no means connects to Amazon’s servers. Information reaches Perplexity solely after passing by the person’s browser, a sequence Amazon’s personal knowledgeable confirmed.

On monetary loss, the temporary cites the Supreme Courtroom’s 2021 resolution in Van Buren v. United States and the Ninth Circuit’s 2022 ruling in hiQ Labs, Inc. v. LinkedIn Corp., each of which held that CFAA “loss” requires technological harms equivalent to file corruption. Amazon’s actual grievance is misplaced promoting impressions – monetized consideration, not the sort of technological harm the statute was designed to handle.

What the district courtroom stated – and what it didn’t

United States District Judge Maxine M. Chesney issued the preliminary injunction on March 9, 2026, only one enterprise day after a listening to. However her statements through the listening to revealed ambivalence. Decide Chesney acknowledged that the conduct at challenge “nearly as if what [Perplexity is] doing should not be coated” by the CFAA. She added that “individuals should be allowed to convey these sorts of purchasing assistants in and have them speak.” She described herself as “sort of caught” with a statute that “is SO broad and covers individuals who could also be performing a helpful act.”

Regardless of these reservations, Decide Chesney granted the injunction, barring Perplexity from accessing Amazon’s protected programs utilizing AI brokers deployed by the Comet browser. She denied Perplexity’s request for a $1 billion bond. The Ninth Circuit subsequently stayed the injunction pending enchantment and ordered expedited briefing.

The temporary argues that Decide Chesney improperly collapsed the 4 impartial necessities for injunctive aid – probability of success on the deserves, irreparable hurt, stability of equities, and public curiosity – right into a single discovering. The courtroom successfully discovered irreparable hurt just by discovering Amazon was prone to succeed on the deserves, somewhat than analyzing every factor individually. Amazon produced no proof that any buyer had complained about or encountered issues with the Comet Assistant.

Why the advert tech business is watching

The implications lengthen far past two firms preventing over a browser. The case sits on the middle of a a lot bigger query: who controls what occurs when an AI agent visits a business web site?

The query has change into pressing. Amazon, Google, and IAB Tech Lab simultaneously accelerated autonomous campaign tools in November 2025, marking a dramatic infrastructure buildout round agentic promoting. Walmart Connect announced its own agentic advertising strategy on January 6, 2026, positioning its retail media community to compete with autonomous purchasing programs. Google launched the Universal Commerce Protocol on January 11, 2026, establishing open-source technical requirements for AI brokers to execute purchases throughout completely different retail platforms.

The distinction with Amazon’s strategy is stark. Whereas Google builds open protocols for AI-mediated commerce and Walmart explicitly welcomes third-party AI brokers, Amazon makes use of authorized motion to dam them. Amazon government Daniel Danker said at Walmart that the retailer would “not block issues on a speculative or hypothetical concern,” a direct rebuke of Amazon’s posture. Walmart’s global advertising business grew 46 percent to nearly $6.4 billion in fiscal year 2026, with Walmart Join up 41 p.c in This fall – development fueled partially by embracing agentic commerce somewhat than preventing it.

If the Ninth Circuit upholds the injunction, platform operators would achieve affirmation that the CFAA can be utilized to limit third-party AI brokers their very own customers select to make use of – even when these brokers entry solely the person’s account information, with the person’s permission, for the person’s profit. That precedent would give each main e-commerce platform a authorized veto over client-side AI software program, no matter client choice.

If the courtroom reverses, the ruling would set up {that a} statute written within the period of mainframe computer systems and dial-up modems doesn’t attain AI brokers working domestically on a person’s gadget on the person’s instruction. Platform operators would nearly definitely reply with technical countermeasures and up to date phrases of service, however the authorized risk would diminish significantly.

The Amazon case just isn’t Perplexity’s solely authorized problem. Reddit filed a separate federal lawsuit against Perplexity on October 22, 2025, alleging the AI firm circumvented anti-scraping controls to entry platform information. That case entails completely different conduct – internet scraping through search engine outcomes pages somewhat than AI-assisted purchasing by a domestically put in browser – however it provides to the authorized strain Perplexity faces.

Amazon has additionally been hardening its governance posture across the board. The corporate up to date its Enterprise Options Settlement efficient March 4, 2026, introducing a proper Agent Coverage requiring AI brokers to establish themselves as automated programs and adjust to new entry guidelines. The coverage offers Amazon contractual authority to revoke entry from any automated software program that fails to fulfill its transparency necessities – a framework far broader than any single lawsuit.

Amazon is also changing how it collects advertising revenue from sellers, saying that advert prices will auto-deduct from vendor proceeds beginning April 15, 2026. On the scale of $68.6 billion in annual promoting income, even small adjustments to billing mechanics carry vital monetary implications. The shift underscores how central promoting has change into to Amazon’s total profitability and the way aggressively the corporate protects that income stream.

The user-agent string controversy

One technical element deserves nearer examination. Amazon alleged that Perplexity configured Comet to transmit the identical user-agent string utilized by Google Chrome, making the AI assistant indistinguishable from a human shopping session. The user-agent string is a chunk of textual content that browsers ship to web sites to establish themselves. Amazon argued this lack of transparency violated business requirements.

The enchantment temporary counters that Comet makes use of considerably the identical user-agent string as different Chromium-based browsers, together with Microsoft Edge, Courageous, and Opera. None of these browsers use distinctive identifiers both. The temporary argues Perplexity has no authorized obligation to equip Comet with any explicit user-agent string, and that Amazon’s actual purpose for demanding the change was so it might establish and block Comet site visitors – not for any professional safety goal, however to guard its promoting enterprise.

The talk reveals a pressure on the coronary heart of the trendy web. Web sites have grown accustomed to figuring out and categorizing their guests. Promoting programs rely upon distinguishing human site visitors from automated site visitors. When an AI agent appears to be like indistinguishable from a human browser, all the infrastructure of impression measurement, click on monitoring, and conversion attribution breaks down. Amazon’s promoting clients pay for human impressions. If a rising share of site visitors comes from AI brokers that skip advertisements fully, the worth proposition of Amazon’s promoting platform erodes.

What comes subsequent

The Ninth Circuit heard the case on an expedited schedule. When the choice arrives, it is going to set up one of many first main authorized precedents governing AI brokers’ entry to business web sites. The end result issues not only for Amazon and Perplexity however for each firm constructing AI assistants, browsers, or autonomous purchasing instruments.

The promoting business generates a whole bunch of billions of {dollars} yearly on the belief that people see advertisements whereas interacting with digital platforms. AI brokers that store, browse, and transact on behalf of people problem that assumption at its core. Whether or not platforms can legally stop these brokers from working – or whether or not customers have the correct to deploy no matter software program they select on their very own gadgets – is a query that can form the following decade of digital commerce.

Amazon has constructed a enterprise that is dependent upon consideration. Perplexity has constructed a product designed to make consideration pointless. One thing has to present.

Timeline

Abstract

Who: Perplexity AI, represented by Quinn Emanuel Urquhart & Sullivan, LLP, is difficult Amazon.com Companies, LLC earlier than the USA Courtroom of Appeals for the Ninth Circuit. The case entails the primary federal lawsuit Amazon has filed towards an AI firm over autonomous purchasing brokers.

What: Perplexity filed a 96-page opening enchantment temporary on April 1, 2026, arguing that the Pc Fraud and Abuse Act doesn’t apply to an AI assistant that runs domestically on a person’s gadget, accesses solely the person’s personal account information, and by no means connects on to Amazon’s servers. The temporary challenges a preliminary injunction issued on March 9, 2026, that barred Comet’s AI Assistant from accessing Amazon’s password-protected accounts.

When: The underlying lawsuit was filed on November 4, 2025. The preliminary injunction was issued on March 9, 2026. The opening enchantment temporary was filed on April 1, 2026. The Ninth Circuit is listening to the case on an expedited schedule.

The place: The unique case was filed in the USA District Courtroom for the Northern District of California, Case No. 25-cv-09514, earlier than Decide Maxine M. Chesney. The enchantment is pending within the Ninth Circuit, Case No. 26-1444.

Why: At its core, the dispute is about promoting income. Amazon’s $68.6 billion promoting enterprise is dependent upon human buyers seeing sponsored listings, show advertisements, and proposals whereas shopping its market. AI purchasing assistants that bypass these promoting components threaten the financial basis of the platform. Amazon argues Perplexity violated federal hacking regulation. Perplexity argues Amazon is weaponizing a 1984 legal statute to guard promoting margins from aggressive know-how that customers voluntarily select to put in.


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