TransUnion is an American consumer credit reporting agency. TransUnion collects and aggregates information on over one billion individual consumers in over thirty countries including "200 million files profiling nearly every credit-active consumer in the United States". Its customers include over 65,000 businesses. Based in Chicago, Illinois, TransUnion's 2014 revenue was US$1.3 billion.
An unhappy customer said in an interview, "They report late, do not report the same info to all creditors. I have perfect credit. Always have, always will. My cr report with Credit Karma is 830 for TransUnion and 835 for Equifax.--TransUnion reports this number on credit karma and does not report the same # to Discover Card--still excellent at 795, but a discrepancy noteworthy. I plan on following this erroneous reporting and, if necessary, to avail myself of all legal remedies that I have at my disposal. Credit is an important necessity in our country and reporting agencies should and will be accountable--as they purport to do with the information they disclose on us."