Prudential Rival is a term used to describe two of the largest insurance companies in the United States, AETNA and Allstate. AETNA is a health insurance company that was founded in 1853 and is headquartered in Hartford, Connecticut. Allstate is an insurance company that was founded in 1931 and is headquartered in Northfield Township, Illinois. Both companies are major competitors in the insurance industry and offer a variety of products and services.