TransUnion is an American consumer credit reporting agency that collects and aggregates information on over one billion individual consumers in over thirty countries. Its customers include over 65,000 businesses. Based in Chicago, Illinois, TransUnion’s 2014 revenue was US$1.3 billion. TransUnion is the smallest of the three largest credit agencies, along with Experian and Equifax (known as the “Big Three”).

TransUnion provides credit reports and other credit and fraud-protection products to consumers, and is required by U.S. law to provide one free credit report per year. The company’s business offerings that use advanced big data, particularly its deep AI-TLOxp product, are growing in popularity.