Every question you type into an AI search engine feels like a private conversation. What’s the best treatment for a health condition? How should you handle your taxes? Where should you invest? You’d never shout those questions across a crowded room. But according to a new class action lawsuit, Perplexity AI was doing exactly that — funneling your private conversations straight to Google and Meta for advertising purposes.
What the Lawsuit Alleges
A 135-page class action complaint filed on March 31, 2026, in the US District Court for the Northern District of California (Case No. 3:26-cv-02803) names Perplexity AI, Google LLC, and Meta Platforms Inc. as defendants. The plaintiff, a Utah resident identified as John Doe, is represented by Houston-based firm Ahmad, Zavitsanos & Mensing.
The core allegation: Perplexity embedded tracking scripts from Meta and Google directly into its code. As soon as users logged in, these trackers silently downloaded onto their devices and began transmitting data to both companies — before Perplexity itself even processed the query.
The complaint describes a data pipeline that sent:
- Full text of user conversations — both prompts and AI responses
- Email addresses tied to user accounts
- Facebook IDs linked to users
- IP addresses, device information, and browser fingerprints
With this combination of data, Meta and Google could match conversations to real identities — pairing your most sensitive questions with your name, address, and advertising profile.
”Incognito Mode” That Wasn’t
Perhaps the most damaging allegation involves Perplexity’s “incognito mode.” The company marketed this feature as creating “anonymous threads” that expire after 24 hours. Users who turned it on had every reason to believe their queries were private.
According to the complaint, the tracking persisted even in incognito mode. The same embedded scripts continued funneling data to Meta and Google regardless of the privacy setting. The feature that was supposed to protect users did nothing to stop the data flow.
The named plaintiff had used Perplexity for sensitive conversations about tax planning, Social Security timing, IRA conversions, investment advice, and legal questions — the kind of information that would be valuable to advertisers and devastating if exposed.
How the Tracking Worked
The lawsuit identifies specific advertising and analytics tools embedded in Perplexity’s platform: Meta Pixel, Google Ads, Google DoubleClick, and Meta’s Conversions API. These are standard tools in the ad-tech industry — designed to track user behaviour across the web and feed data back to advertising platforms.
What makes this case notable is where these trackers were deployed. Users interacting with an AI search engine have a reasonable expectation that their queries are being processed by that engine — not simultaneously broadcast to the world’s two largest advertising companies via full-string URL interception inside the browser.
The complaint alleges that none of this was disclosed in Perplexity’s privacy policy.
14 Legal Claims
The lawsuit brings 14 counts against the three defendants, including:
- Invasion of privacy under California law
- California Comprehensive Computer Data Access and Fraud Act violations
- Federal Electronic Communications Privacy Act violations (wiretapping)
- Deceit — for misrepresenting the privacy of user conversations
- Unfair competition under California business law
The proposed class covers all Perplexity users (excluding paid Pro and Max subscribers) whose data was sent to Meta or Google between December 7, 2022, and February 4, 2026. A California subclass is also proposed.
If the class is certified, statutory damages of $5,000 per violation could apply.
Perplexity’s Response
Perplexity’s chief communications officer Jesse Dwyer told reporters: “We have not been served any lawsuit that matches this description so we are unable to verify its existence or claims.” The company did not deny the underlying tracking practices described in the complaint.
The company, valued at $20 billion following a $200 million funding round in September 2025, has not yet filed a formal response in court.
Why This Matters
This lawsuit exposes a pattern that extends far beyond one company. AI tools are being positioned as private, personal assistants — spaces where people share health concerns, financial details, legal questions, and other sensitive information. If those conversations are being quietly funneled to advertising platforms, the privacy implications are enormous.
Think about what people ask AI tools that they wouldn’t type into a regular search engine. The conversational format encourages more disclosure, more specificity, more vulnerability. And according to this complaint, all of that extra trust was being monetised without consent.
This is also a reminder of why your choice of service provider matters. Any platform that depends on advertising revenue has a structural incentive to share your data — or at minimum, to allow third-party trackers that do it for them. The business model is the vulnerability.
Privacy-respecting alternatives exist. Tools built on open-source code can be audited. Services hosted in privacy-strong jurisdictions like Switzerland operate under data protection laws that restrict exactly this kind of undisclosed data sharing. And platforms that charge users directly — rather than monetising their data — don’t have an incentive to embed ad trackers in the first place.
The Perplexity case is a test of whether AI companies will be held to the same privacy standards as everyone else, or whether the excitement around AI will be used as cover for the same old surveillance capitalism playbook.