The top five auto insurance companies as of 2014 are State Farm Group, Berkshire Hathaway Insurance, Allstate Insurance Group, Progressive Insurance Group and Farmers Insurance Group, according to Insure.com. As these companies have the highest numbers of customers, they are likely very well-known.
The top five are not the only auto insurers in the United States, however, and they are not the only well-known insurance companies. In fact, the top 10 auto insurance companies in the United States control 70 percent of the market, Insure.com notes. These additional companies include American Family Insurance, Liberty Mutual Insurance, Travelers Group and Nationwide Group.
As of 2015, USAA and Amica offer the best value car insurance, along with State Farm and Geico, states Consumer Reports.