A proposed class-action lawsuit filed April 1, 2026 in the US District Court for the Northern District of California accuses Perplexity AI of secretly routing user conversations to Meta and Google via hidden tracking software — without user consent, and without disclosure in the company’s privacy policy. The complaint, filed by a Utah man identified as John Doe (case: Doe v. Perplexity AI Inc., 3:26-cv-02803), also names Meta and Google as defendants for allegedly violating federal and state computer privacy and fraud laws.
What the Lawsuit Alleges
According to the 140-page complaint, Perplexity embedded “undetectable” tracking scripts into its search engine code that activate automatically when users log in. The trackers then transmit the full content of user conversations to Meta’s and Google’s infrastructure in real time. Key claims:
- Trackers download onto users’ devices the moment they visit Perplexity’s homepage after logging in
- Meta and Google receive complete transcripts of conversations — not just metadata or session identifiers
- If a user signed up with an email address, that email address is transmitted alongside the conversation data
- The tracking persists even in Incognito mode, which the complaint describes as providing no real protection
- The lawsuit includes a specific example: a query like “What is the best treatment for liver cancer?” would have the full prompt transmitted to Meta and Google via a URL string intercepted inside the browser
The lead plaintiff states he shared personal information about his taxes, investments, and family finances with Perplexity, believing those conversations were private. He claims he was “dismayed to discover that complete and partial transcripts of his communications with Perplexity were shared with Meta and Google every time he interacted with Perplexity’s AI Machine.”
The Privacy Laws at Stake
The complaint alleges violations of the California Consumer Privacy Act (CCPA), California’s Electronic Communications Privacy Act (CalECPA), and California’s wiretapping statute. Under CCPA, sharing sensitive personal information — including health and financial data — with third parties for advertising purposes without explicit consent is a violation. The complaint argues that Perplexity’s behavior falls squarely into that category.
If the case proceeds to class certification, it could encompass millions of Perplexity users who shared sensitive information with the platform. California’s privacy laws allow for statutory damages, and a successful class action at this scale could result in significant liability.
Perplexity’s Response
Perplexity spokesperson Jesse Dwyer stated: “We have not been served any lawsuit that matches this description so we are unable to verify its existence or claims.” The company has not issued a substantive denial of the underlying tracking allegations. Meta pointed to its own policies prohibiting advertisers from sending sensitive data through Facebook’s systems. Google did not respond to press inquiries by publication time.
Context: Perplexity’s Growing Legal Exposure
This is not the first lawsuit Perplexity has faced in 2026. A federal judge in San Francisco recently issued a preliminary injunction preventing Perplexity’s Comet browser AI agent from accessing password-protected areas of Amazon’s website. Amazon also has a separate ongoing lawsuit against Perplexity over its “Buy with Pro” e-commerce feature, which Amazon alleges scraped product listings without authorization. The pattern of legal challenges suggests Perplexity has moved fast in expanding capabilities without fully resolving the legal and privacy questions each new feature raises.
What It Means for AI Tool Users
If the allegations prove accurate, they strike at the core of Perplexity’s brand proposition. The company has marketed itself as a smarter, cleaner alternative to ad-funded search — a tool where your queries aren’t being monetized. If those same queries were being routed to Meta and Google for advertising targeting, the differentiation collapses entirely.
More broadly, the lawsuit raises a question that applies to every AI chat tool, not just Perplexity: what happens to the sensitive information users share with AI assistants? Health questions, financial details, legal queries — users routinely share information with AI tools they would never type into a standard search engine. The legal and privacy frameworks governing what AI companies can do with that data are still being defined in real time.
Conclusion
The Perplexity lawsuit is at its earliest stage — the company hasn’t even been formally served yet. Class-action cases typically take 12 to 36 months from filing to resolution. But the allegations are specific enough to warrant attention from anyone who uses Perplexity for sensitive research. Browse our directory to explore alternative AI research tools and their privacy practices as this case develops.
