
For Doe, he was “dismayed” to discover that full and partial transcripts of chats about his family’s financial information appeared to have been shared with Google and Meta, reportedly along with PII. His complaint says he relies on Perplexity to help manage taxes, obtain legal advice, and make investment choices. He argued that, without an injunction stopping Perplexity’s alleged ongoing privacy harms, he would be prevented from using his preferred search engine.
The lawsuit asserts other members of the proposed class likely turned to Perplexity when researching various sensitive topics. It alleges the companies built ad trackers to operate “surreptitiously” so they could purportedly “exploit this sensitive data for their own benefit, including targeting individuals with advertising and reselling their sensitive data to additional third parties.”
Most worryingly, people often use these AI systems to look up health and medical information, particularly when talking to another person might feel embarrassing or upsetting.
The complaint claims Perplexity appears to take advantage of users’ tendency to overshare with AI by prompting them to upload sensitive records during chats. That includes data that, if transmitted to Google and Meta, could cause users to be suddenly targeted with ads they “may find overwhelming, disturbing, or, in many instances, physically deleterious,” the filing said.
For example, the complaint notes Perplexity answers a simple prompt like “What is the best treatment for liver cancer?” by offering that “I can help you interpret a specific scan report, biopsy result, or proposed treatment plan if you share more details.”
The suit says invasive trackers embedded in Perplexity’s AI search engine include the Facebook Meta Pixel, Google Ads, and Google DoubleClick, and possibly a Meta tool called “Conversions API.” The complaint alleges Meta recommends partners use that technology alongside the Meta Pixel because it supposedly provides a “workaround” that stops “savvy users” from blocking Pixel tracking. It also points out Meta has faced several privacy lawsuits over that tech, with some settlements, while Congress has criticized some former partners who used trackers from Google and Meta.








