The Ninth Circuit Court of Appeals has vacated a preliminary injunction that Amazon.com Services, LLC sought against Perplexity AI, Inc., an artificial intelligence company. This decision, which came on August 4, 2026, affects how AI tools can interact with e-commerce platforms like Amazon.com. The ruling is significant as it clarifies the legal boundaries of AI usage in accessing online services.
The case, officially noted as No. 26-1444, involved Amazon claiming that Perplexity's AI tool, known as the Assistant, violated the federal Computer Fraud and Abuse Act (CFAA) and California’s Comprehensive Computer Data Access and Fraud Act (CDAFA). Amazon sought to prevent Perplexity from using its AI tool on its platform, arguing that it accessed Amazon's systems without authorization. The Ninth Circuit's ruling indicates that Amazon is unlikely to succeed in proving its claims.
Amazon and Perplexity are at the center of this legal dispute. Amazon, a giant in the e-commerce space, operates Amazon.com, where customers can shop for various products. Perplexity, on the other hand, is an AI startup that developed a web browser called Comet, which features an AI assistant designed to help users navigate the internet. The conflict arose when Amazon claimed that the Assistant was accessing its platform without permission, despite users directing the AI to perform tasks on Amazon.com.
The legal battle began when Amazon filed a complaint in November 2025, alleging violations of the CFAA and CDAFA. Amazon argued that Perplexity's Assistant was accessing user accounts on Amazon.com without authorization. The district court initially sided with Amazon, granting a preliminary injunction to prevent Perplexity from using its AI tool on Amazon's platform. However, Perplexity appealed the decision, leading to the Ninth Circuit's review.
In its ruling, the Ninth Circuit concluded that Amazon was unlikely to succeed on the merits of its claims under both the CFAA and CDAFA. The court stated, "It is the user who 'accesses' Amazon's computers, with the help of the Assistant to carry out specific acts on Amazon.com." This determination was pivotal in vacating the preliminary injunction, as it indicated that Perplexity did not directly access Amazon's systems but rather facilitated user access.
The court also noted that the district court had erred in its assessment of the equitable factors that typically guide the granting of an injunction. The Ninth Circuit found that the potential harms Amazon faced did not outweigh the interests of Perplexity, stating, "the balance of the equities favors Perplexity and weighs against an injunction." The judges emphasized that an injunction against conduct that likely does not violate the CFAA or CDAFA would not serve the public interest.
This ruling has broader implications for the tech industry, particularly concerning the use of AI in accessing online platforms. The Ninth Circuit's decision underscores the need for clear legal definitions regarding how AI tools interact with existing systems. As AI technology continues to evolve, the legal landscape surrounding its use will likely adapt as well.
Looking ahead, it remains to be seen whether Amazon will appeal this ruling or if there are related cases pending that could further clarify the legal status of AI tools in e-commerce. The Ninth Circuit's decision does not prevent Amazon from regulating access to its platform through its terms of service, but it does limit its ability to invoke the CFAA and CDAFA against AI developers like Perplexity.
As this case illustrates, the intersection of technology and law is complex and continually evolving. The outcome may influence how companies develop and deploy AI tools in the future, shaping the relationship between users, AI developers, and online platforms.