Amazon has sent a cease-and-desist letter to Perplexity that demands that the AI startup prevents its Comet browser from making purchases on Amazon, Bloomberg reports. In a blog post responding to Amazon's letter, Perplexity claims Amazon is "bullying" the company and that its demands pose "a threat to all internet users."In Amazon's eyes, Comet's agent violates its terms of service, degrades the Amazon shopping experience and introduces privacy vulnerabilities, Bloomberg writes. Amazon's "Conditions of Use" for Amazon.com specifically prohibit "any downloading, copying, or other use of account information for the benefit of any third party" and "any use of data mining, robots, or similar data gathering and extraction tools." Depending on your definition, the agentic capabilities Perplexity offers through Comet could violate both clauses. The browser securely stores log-in credentials for websites locally, and uses them to make purchases for customers on Amazon with a simple command.Perplexity and Amazon agreed to pause agentic shopping on Amazon in November 2024, according to the report, but when Comet was released, Perplexity allowed it again. By representing the Comet agent as a Chrome browser user rather than a bot, the company allegedly tried to get around the agreement, until Amazon found out and sent its cease-and-desist letter.Amazon posted the statement below on its blog, openly acknowledging the issues it has with Perplexity: