Amazon v. Perplexity AI is a lawsuit in which Amazon.com, Inc. seeks to bar Perplexity AI, Inc.'s Comet AI shopping agent from accessing Amazon's marketplace under unauthorized-access theories. Amazon filed in November 2025; on March 9, 2026 the U.S. District Court for the Northern District of California granted Amazon a preliminary injunction, and Perplexity appealed to the Ninth Circuit on April 1, 2026. It is among the first cases to apply Computer Fraud and Abuse Act (CFAA) and authorization theories to an AI agent that transacts on a user's behalf rather than merely extracting data.
| Field | Detail | |
|---|---|---|
| Plaintiff | [[companies/amazon | Amazon.com, Inc.]] |
| Defendant | [[companies/perplexity | Perplexity AI, Inc.]] |
| Court | U.S. District Court, Northern District of California (Judge Maxine Chesney); preliminary-injunction order on appeal at the Ninth Circuit as of April 1, 2026 | |
| Filed | November 2025 | |
| Status | Active. Preliminary injunction granted March 9, 2026; appeal argued June 11, 2026; an appeals-court ruling that Amazon was unlikely to succeed on its CFAA claim was reported in early August 2026, with the effect on the injunction not established |
Background
The dispute concerns Perplexity's Comet AI shopping agent and its access to Amazon's website. Amazon's competing shopping AI is Rufus.
Claims
Amazon alleges that Comet accessed Amazon's website without authorization, and that Perplexity disguised Comet's automated traffic as ordinary Google Chrome browser sessions to evade detection. Its theories are:
- Unauthorized access — Amazon's terms of service prohibit automated scraping, and Comet's agent activity continued after Amazon objected.
- Fraudulent concealment — Perplexity allegedly modified Comet to mimic human Chrome traffic rather than transparently identifying as an AI agent.
- Security and integrity risks — Amazon argues that unverified agent traffic poses fraud, abuse, and customer-confusion risks.
Perplexity responds that Amazon's true motive is competitive: Comet bypasses the advertising shown to human shoppers, threatening Amazon's ad-revenue model and competing with Amazon's own Rufus shopping AI. Perplexity also argues that the user, not Perplexity, directs the agent, and that Comet acts on behalf of an authenticated Amazon customer using their own credentials. It contends that blocking the agent harms users' ability to delegate routine purchasing to AI assistants.
Procedural history
Amazon filed the suit in November 2025. On March 9, 2026, Judge Maxine Chesney (N.D. Cal.) granted a preliminary injunction, finding "strong evidence" that Comet accessed Amazon "at the user's direction" but "without authorization" from Amazon, and enjoining Comet from accessing Amazon's marketplace (Source: cnbc.com; bloomberg.com). On April 1, 2026, Perplexity appealed to the Ninth Circuit, seeking to overturn the preliminary injunction (Source: pymnts.com).
The Ninth Circuit heard oral argument on June 11, 2026, weighing how the Computer Fraud and Abuse Act applies to AI agents that browse on a user's behalf; the district court had found Perplexity violated the CFAA and California's analogous statute by continuing to access Amazon's systems after a cease-and-desist letter (Source: laweconcenter.org).
A U.S. appeals court subsequently held that Amazon was unlikely to succeed on its claim that Perplexity's AI agents violated the Computer Fraud and Abuse Act by covertly accessing private Amazon customer accounts. The ruling was dated August 5, 2026 in an August 7 account of it, while the underlying report of the decision carries an August 4 date; the two dates have not been reconciled. Legal commentary distinguishes the case from the model-driven intrusions disclosed by frontier developers in July 2026 on the ground that it involves agents acting on behalf of human users rather than fully autonomous models (Source: reuters.com). The retrieved account does not state what the ruling does to the preliminary injunction, and the disposition is therefore not recorded here.
Current status
The Ninth Circuit heard oral argument on the appeal on June 11, 2026. An appeals-court ruling adverse to Amazon's CFAA theory was reported in early August 2026 (see the procedural history above); whether the March 9, 2026 preliminary injunction remains in force after that ruling has not been established from the available sources.
Commentary
Observers describe the case as the first major test of CFAA and authorization theories applied to agentic AI. Prior scraping cases such as hiQ v. LinkedIn and Van Buren v. United States tested whether automated access exceeds authorization for data extraction; Amazon v. Perplexity extends the question to transactional agent activity, such as placing orders. Perplexity's user-direction defense raises the question of whether the user or the agent vendor is the relevant access principal for agent-mediated activity; commentators note that if the Ninth Circuit accepts the user-as-principal framing, the holding would limit a site operator's ability to block agentic traffic through terms of service alone. The same agent-routing question is expected to recur for travel sites, ticketing platforms, and other commercial sites. Commentary also frames the dispute as the agentic-era counterpart to earlier browser-extension and price-comparison-tool disputes over whether software can act on a user's behalf inside a commercial site, and, in light of Perplexity's argument that Amazon is protecting ad revenue from agent disintermediation, as an antitrust-adjacent dispute over who captures e-commerce surplus.
Confidence is medium: the primary court orders were not retrieved, and details are triangulated from CNBC, Bloomberg, GeekWire, Retail Dive, and IAPP coverage. The court, exact dates, and order language should be verified before citing specific holdings.
Relationships
- contradicts: Perplexity's user-direction theory of agent attribution.
- depends-on: AI Agentic Browsers, Perplexity, Amazon.
- related: Browser-extension and scraping precedents (hiQ v. LinkedIn; Van Buren v. United States); broader agentic-commerce industry shift; Amazon's Rufus shopping-AI product.