The main credit bureaus are private companies that collect and organize people’s borrowing and payment history into credit reports, which lenders and others use to make financial decisions about you.

Who the major credit bureaus are

In the United States, when people ask “who are the credit bureaus,” they usually mean the three big nationwide credit reporting agencies:

  • Equifax – A large credit reporting company that compiles consumer credit reports and sells credit data and related services to lenders and businesses.
  • Experian – Another major bureau that gathers information from banks, credit card issuers, lenders, and public records to create consumer credit files.
  • TransUnion – The third major bureau, also collecting and maintaining detailed credit histories and selling reports and credit‑related tools to businesses.

These three are often called the “big three” because they operate nationwide and are the most commonly used by large lenders.

What credit bureaus do

Credit bureaus do not decide whether you’re approved for a loan; instead, they provide data that lenders use. Their core activities include:

  • Collecting information from “data furnishers” like banks, credit unions, credit card issuers, mortgage and auto lenders, and collection agencies.
  • Adding certain public record information (for example, some court or bankruptcy data) to your file where allowed by law.
  • Compiling this information into credit reports tied to your identity details, such as name, address, and Social Security number.
  • Selling credit reports (and often credit scores derived from them) to creditors, insurers, landlords, and others with a permissible purpose.

Credit bureaus are different from score brands like FICO or VantageScore, which are separate companies that use bureau data to calculate credit scores.

Other bureaus beyond the “big three”

Although Equifax, Experian, and TransUnion are the best known, there are actually many specialized or smaller credit reporting agencies.

  • In the U.S., hundreds of niche bureaus focus on areas like tenant screening, utility payments, or check‑writing history.
  • In other countries, similar organizations exist under different names; for example, a credit information company (CIC) in India serves a similar role to a credit bureau.

These additional agencies may not be used by every lender, but they can still affect how certain companies evaluate applications.

TL;DR: The answer to “who are the credit bureaus” usually points to Equifax, Experian, and TransUnion , which are large companies that gather your credit data and package it into reports and scores used in lending and other financial decisions.

Information gathered from public forums or data available on the internet and portrayed here.