Key Takeaways
- Data brokers collect personal information from public records, online activity, loyalty programs, and other sources.
- They sell profiles to marketers, employers, insurers, and others — often without your knowledge.
- There are hundreds of data broker companies operating legally in the United States.
- Some U.S. states now give residents the right to request deletion of their data from brokers.
- You can take concrete steps to limit your exposure, including opting out of major brokers directly.
Data Broker
A data broker is a company that collects personal information about individuals from a wide range of sources, compiles it into detailed profiles, and sells or licenses that information to third parties. These companies operate largely behind the scenes — most people have never heard of them, yet their profiles may include your name, address, age, income range, purchasing habits, and more. Data brokers are a formal, legal industry, though their practices are subject to growing regulatory scrutiny.
Data brokers are distinct from first-party data collectors (like a retailer that stores your purchase history). They aggregate data across many unrelated sources to build composite profiles, often without any direct relationship with the individuals being profiled.
How Data Brokers Build a Profile of You
Data brokers piece together your personal profile the way a researcher assembles a mosaic — using dozens of small fragments from unrelated sources until a detailed picture emerges. The raw materials include public records such as property ownership filings, voter registration data, marriage and divorce records, and court documents. These are combined with commercial data like loyalty card purchase histories, magazine subscription lists, and warranty registration cards.
Online activity adds another layer. When you visit websites, advertising networks log your behavior using cookies and tracking pixels. That data flows into broker databases, often tagged with your device identifiers or email address. Social media profiles — particularly those with public settings — contribute demographic details and interest data as well.
The result is a profile that may include your full name, current and past addresses, family relationships, estimated income, property ownership, vehicle history, and inferred characteristics like political affiliation or health interests. No single source is especially revealing; the danger lies in aggregation.
To understand how your browser contributes to this picture, see what your browser actually knows about you.
$300B+
Estimated annual U.S. data broker industry revenue
Industry analysts have placed the U.S. data brokerage market in the hundreds of billions of dollars, though precise figures vary by methodology and scope of definition.
~4,000
Estimated data broker companies operating globally
Privacy researchers and advocacy organizations have estimated the global count of data broker companies at several thousand, with several hundred operating primarily in the U.S. market.
5
U.S. states with comprehensive consumer privacy laws
As of the mid-2020s, a growing number of states have enacted laws giving residents rights over their personal data, with California's CCPA among the most expansive.
Who Buys This Data — and Why
The data broker industry exists because personal information has commercial value. The primary buyers fall into a few broad categories:
- Marketers and advertisers use broker profiles to target campaigns at specific demographic groups — age ranges, income tiers, or households likely to purchase a given product category.
- Background check services used by employers and landlords draw on broker databases to verify identity, employment history, and court records.
- Insurance companies have used consumer data to inform risk assessments, though regulatory rules vary by state and insurance type.
- Financial institutions use data to help detect fraud or assess creditworthiness in some contexts.
- Political campaigns purchase voter files supplemented with consumer data to target outreach and fundraising.
- Law enforcement agencies have contracted with certain brokers to access location and contact data, a practice that has drawn substantial civil liberties scrutiny.
Understanding who holds and shares your data is also relevant if you use connected devices at home — smart home devices can feed data into this same ecosystem.
“The problem with data brokers isn't that they collect information — it's that consumers have almost no idea it's happening and very little power to stop it.”
— Pam Dixon, Executive Director, World Privacy Forum
Your Rights and What You Can Actually Do
Reducing your data broker exposure takes some effort, but it is achievable. Here's a realistic overview of your options:
Know Your State's Privacy Rights
California's Consumer Privacy Act (CCPA) and similar laws in states like Virginia, Colorado, and Texas give residents the right to request that brokers delete their information. If you live in one of these states, you can submit deletion requests directly. Check your state attorney general's website for guidance on applicable rights.
Opt Out Directly
Many large data brokers — including people-search sites — maintain opt-out pages. The process is manual and repetitive, since there are hundreds of brokers, and some will re-add your information after a period of time. Documenting your requests is useful if you need to follow up.
Limit What You Share Upstream
Data brokers can only aggregate what exists. Practical upstream habits include using loyalty programs selectively, reviewing the privacy settings of apps and social media accounts, and being deliberate about what information you attach to your email address. Understanding how tracking cookies work also helps reduce the behavioral data that flows to brokers.
For a broader look at device-level controls, understanding your device's privacy settings is a useful next step.
Start With the Biggest People-Search Sites
If opting out of every data broker feels overwhelming, prioritize the high-traffic people-search sites first — these are the ones most likely to surface your home address and contact details in a basic web search of your name. Most have opt-out forms accessible from their website footers. Tackling a handful of major operators gives you meaningful privacy gains without requiring you to work through every broker at once.