San Francisco, CA – Amazon has secured a preliminary injunction against Perplexity AI, blocking the startup’s AI-powered search agent, Comet, from accessing and scraping content from the e-commerce giant’s website. The ruling, issued Monday by U.S. District Judge Maxine Chesney, marks a significant win for Amazon in its ongoing efforts to protect its data and advertising revenue from unauthorized AI access. The legal battle highlights the growing tension between AI developers and companies seeking to control how their online content is used.
The lawsuit, initially filed in November 2025, alleged that Perplexity’s Comet browser accessed Amazon’s website “without authorization,” posing potential security risks to customer data and disrupting the company’s advertising systems. Amazon argued that the AI agent’s actions required significant resources to mitigate, including the development of latest tools to block Comet’s access and prevent future unauthorized activity. The core of the dispute centers on whether Perplexity’s AI constitutes legitimate website traffic or automated scraping that undermines Amazon’s business model.
Amazon’s Claims of Unauthorized Access and Financial Impact
According to court filings, Amazon presented “strong evidence” that Comet accessed its website at the direction of users, but did so without the e-commerce platform’s permission. Judge Chesney found that Amazon had demonstrated a “likelihood of success on the merits of its claim.” Amazon detailed the financial impact of Perplexity’s actions, stating it spent over $5,000 responding to the issue, including employee time dedicated to developing blocking mechanisms. This expenditure underscores the cost companies face when defending against unauthorized AI scraping.
A key concern for Amazon is the impact on its advertising revenue. The company explained in its complaint that when AI systems like Comet generate ad traffic, it becomes necessary to detect and filter those impressions before advertisers can be accurately billed. “These system adaptations are necessary to maintain contractual obligations with advertisers who pay only for legitimate human impressions,” Amazon stated. The company fears that unchecked AI-generated traffic could erode trust in its advertising platform and lead to financial losses. The issue of identifying and filtering out automated traffic is a growing challenge for online advertising platforms as AI becomes more prevalent.
Perplexity’s Response and the Appeal Process
Judge Chesney’s ruling includes a one-week stay, allowing Perplexity to appeal the injunction. As of March 10, 2026, Perplexity has not publicly commented on the ruling or its plans for an appeal. The company has previously defended its technology, arguing that Comet is designed to provide users with helpful information and does not intend to cause harm to websites. However, the court sided with Amazon’s argument that the AI’s actions constituted unauthorized access and posed a legitimate threat.
The case raises broader questions about the legal boundaries of AI-powered web scraping and the rights of website owners to control access to their content. While web scraping itself is not inherently illegal, accessing websites in violation of their terms of service or using automated tools to circumvent security measures can lead to legal challenges. The outcome of this case could set a precedent for future disputes between AI developers and content providers.
Security Concerns and Customer Data Protection
Beyond the advertising implications, Amazon also raised concerns about the security of customer data. The company argued that Perplexity’s agents could potentially act within protected computer systems, including accessing private customer accounts requiring passwords. This concern highlights the potential risks associated with AI agents that can interact with websites on behalf of users. While Perplexity maintains its technology is secure, Amazon’s lawsuit underscores the need for robust security measures to protect sensitive customer information.
The debate over AI access to websites also touches on the issue of robots.txt, a standard used by website owners to communicate which parts of their site should not be crawled by web robots. While Perplexity has stated it respects robots.txt, Amazon alleges that Comet bypassed these directives in certain instances. The effective enforcement of robots.txt and other access control mechanisms is crucial for maintaining the integrity and security of the web.
The Broader Implications for AI and E-commerce
This legal clash between Amazon and Perplexity is not an isolated incident. Numerous companies are grappling with how to respond to the increasing employ of AI to access and utilize their online content. The rise of large language models and AI-powered search agents has created new opportunities for innovation, but also new challenges for businesses seeking to protect their intellectual property and revenue streams. The legal landscape surrounding AI is still evolving, and We see likely that more lawsuits will be filed as companies attempt to define the boundaries of acceptable AI behavior.
The case also highlights the tension between open access to information and the need for companies to protect their business interests. AI developers argue that web scraping is essential for training AI models and providing users with valuable information. However, companies like Amazon contend that unauthorized scraping can harm their businesses and compromise the security of their platforms. Finding a balance between these competing interests will be crucial for fostering innovation while protecting the rights of content providers.
What Happens Next?
Perplexity has a week from the date of the ruling – March 10, 2026 – to file an appeal. The outcome of that appeal will determine whether the injunction remains in place. If Perplexity appeals and loses, the company will be prohibited from allowing Comet to scrape Amazon’s website. The case could potentially reach the Ninth Circuit Court of Appeals, and the Supreme Court. The legal proceedings are expected to continue for several months, potentially longer if the case is appealed to higher courts. CNBC provides ongoing coverage of the case.
This ruling is likely to encourage other companies to accept legal action against AI developers who they believe are infringing on their rights. It also underscores the importance of clear terms of service and robust security measures for protecting online content. As AI continues to evolve, the legal and ethical challenges surrounding its use will only become more complex.
Key Takeaways:
- Amazon has won a preliminary injunction against Perplexity AI, blocking its Comet AI agent from scraping Amazon’s website.
- The lawsuit centers on allegations of unauthorized access, security risks, and disruption to Amazon’s advertising business.
- Perplexity has a week to appeal the ruling.
- The case highlights the growing legal challenges surrounding AI-powered web scraping and data access.
- The outcome could set a precedent for future disputes between AI developers and content providers.
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