Perplexity AI Sued for Secretly Sharing User Conversations With Meta and Google

If You Thought AI Search Was Private, Think Again

On April 1, a Utah man filed a class-action lawsuit against Perplexity AI in federal court in San Francisco. The core allegation: Perplexity has been sharing users' entire conversation data with Meta and Google in real time.

According to the complaint, this tracking worked even in Incognito mode. That directly contradicts the implicit promise of AI search: that your queries stay between you and the AI.

The Fundamental Tension Between AI Search and Data Monetization

Perplexity AI launched in 2022 and quickly grew as the "Google killer," an AI search engine that generates direct answers instead of showing ad-laden link lists. The pitch resonated with users who were tired of scrolling through ads to find information.

But every AI search service faces the same question: how do you pay for it?

Search Service	Revenue Model	Data Usage
Google Search	Advertising ($300B+/year)	Search data for ad targeting
Perplexity AI	Subscription ($20/month) + ads (testing)	At issue in lawsuit
ChatGPT Search	Subscription-based	Training data usage debated

Traditional search engines monetize through advertising powered by user search data. AI search promised to break that model, but LLM inference costs are expensive, and subscription revenue alone may not cover them. The gap between cost and revenue creates the temptation to monetize data.

What the Lawsuit Alleges

"Undetectable" Tracking Scripts

The complaint claims Perplexity installs tracking scripts at login that are essentially invisible to users. These scripts allegedly transmit conversation data to Meta's and Google's infrastructure in real time.

The plaintiff's specific claims are threefold. First, tracking scripts download automatically the moment a user signs up for a free account or logs in, with no separate consent mechanism. Second, the transmitted data includes users' full prompts, email addresses, and session information. Third, the tracking persists in Incognito mode, operating independently of browser privacy settings.

Legal Basis: California Privacy Law

The suit is brought under the California Consumer Privacy Act (CCPA) and its successor, the California Privacy Rights Act (CPRA). These laws require companies to provide clear notice and opt-out opportunities before selling or sharing personal information with third parties.

If Perplexity shared user conversations with Meta and Google without disclosing this in its privacy policy, that is potentially a statutory violation, not just a questionable practice.

Perplexity's Position

A Perplexity spokesperson said the company has "not been served any lawsuit matching this description" and therefore "cannot verify its existence or claims." There has been no substantive denial of the underlying allegations.

The Bigger Picture: AI's Data Privacy Reckoning

This lawsuit is not just about Perplexity. It is the first major legal challenge to how AI services handle user data.

Consider the difference. When you search Google for "weather in New York," that is a low-sensitivity query. When you ask an AI search engine "is this contract clause unfavorable to me" or "my child has a 101-degree fever, what should I do," you are sharing deeply personal information in conversational form.

If that conversational data flows to advertising companies, the privacy implications are qualitatively different from traditional search data leaks.

The depth of information users share with AI search tools is fundamentally different from traditional search. The level of data protection needs to match that depth. That is the core message of this lawsuit.

Perplexity is also facing a separate suit from Amazon over data scraping practices. The company is accumulating legal risk from multiple directions simultaneously.

What This Means for You

If you use Perplexity, review your privacy settings now. Check whether data-sharing options exist, and consider asking sensitive questions without being logged in.

If you are building AI products, watch this case closely. A ruling against Perplexity would tighten legal standards for data collection and usage across all AI services. Transparent privacy policies would shift from nice-to-have to legally required.

This is a class-action case, so resolution will likely take 12 to 36 months. But the filing itself sends a message to the AI search market: the era of quietly monetizing user conversations is over.

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References

• Perplexity AI Machine Accused of Sharing Data – Bloomberg
• Perplexity AI Faces Lawsuit Over Alleged Privacy Violations – San Francisco Today
• Perplexity, Meta And Google Hit With Privacy Suit – MediaPost