Periagoge
Concept
3 min readself knowledge

Data Brokers: The Hidden Industry Selling Everything About You to AI Companies

Data brokers aggregate public records, purchase histories, credit inquiries, and app behavior to build detailed profiles about you—then sell these profiles to AI companies for training, making your information a raw material in systems you never consented to. Most people don't know these companies exist, let alone that they can request removal, which is precisely the point of operating as a behind-the-scenes industry.

Hypatia
Why It Matters

You've never heard of most companies that have your data. These are called data brokers—companies whose sole business is collecting information about millions of people and selling it to other companies, marketers, AI developers, and sometimes worse actors.

You didn't consent to data brokers. You don't use their services. Yet they maintain detailed profiles about you drawn from public records, transactions, online behavior, and data purchases from other companies. These profiles are then fed into AI systems to train algorithms that predict and influence your behavior.

What Data Brokers Actually Collect

A typical data broker profile might include:

  • Your address history and current address
  • Phone numbers (including unlisted ones)
  • Email addresses
  • Vehicle registration and driving records
  • Property ownership and home value estimates
  • Purchasing history and spending patterns
  • Loan and mortgage history
  • Estimated income level
  • Age, gender, family status
  • Interests and hobbies inferred from public data
  • Social media activity
  • Arrest and court records
  • Health conditions (inferred)

This is compiled from hundreds of data sources and cross-referenced to build a single profile tied to your name, address, and phone number. That profile is then sold thousands of times per year.

Who Buys This Data and Why

Marketers buy data to target you with ads. Employers buy data to screen job candidates (knowing your interests, home value, and estimated income before interviewing you). Insurance companies buy data to adjust quotes based on inferred risk. Political campaigns buy data to micro-target voters. AI companies buy data to train models.

The problem: you have no idea what's in your profile or how inaccurate it might be. A data broker might have labeled you as high-income based on a single purchase, or misclassified your interests, or included someone else's information mixed with yours. You're impacted by incorrect data you never consented to and can't correct.

The Opacity Is Intentional

Data brokers operate in shadow. Most people don't know they exist. There's no clear list of which brokers have your data. Many brokers don't make it easy to access or delete your information—they'll charge you money, request extensive documentation, or make the process deliberately difficult.

Legally, data brokers argue they're protecting privacy because they sell data in aggregate ("people interested in fishing") rather than named individuals. But in reality, with enough data points, individuals can be uniquely identified from supposedly "anonymized" datasets.

How to Find and Remove Your Data

Some brokers allow opt-out (removal from their database). Finding them requires research. Brokers like Equifax, Experian, Acxiom, and Data.com are major players, but there are hundreds of smaller ones. Services like Privacy.com and Incogni help automate opt-out requests to multiple brokers.

However, opt-out is often temporary. Brokers might re-add you within months when they update data from other sources. The data they've already sold continues circulating indefinitely.

Try this: Visit Spokeo or BeenVerified, search for yourself, and see what information they've compiled about you. You'll likely be shocked at how much is there, how accurate it is, and how intrusive it feels. Then look for an opt-out option (usually buried in their site) and submit removal requests. Note that removal often requires confirming your identity, which is ironic given these brokers' privacy practices.

Helpful guides
Hypatia
Daily Life & Decisions
Related Concepts
Peri
Questions about Data Brokers: The Hidden Industry Selling Everything About You to AI Companies?

Peri can explain this concept, give practical examples, help you decide whether it applies to your situation, or recommend a journey if appropriate.

Ready to work on Data Brokers: The Hidden Industry Selling Everything About You to AI Companies?

Explore related journeys or tell Peri what you're working through.