Commerce Insurance Company, based in Massachusetts, offers a wide range of insurance products for the residents of Massachusetts and New Hampshire. Its sister subsidiary companies offer auto insurance in several other states, and the parent company is MAPFRE, one of the largest and most financially stable insurers in the world. Commerce is known for being the largest auto insurer for the state of Massachusetts and a major provider in New Hampshire. The company offers numerous discounts to its policy holders and unique programs to reduce premium costs. Commerce has had complaints in regards to its claims processing but still remains a popular insurance option for Massachusetts and New Hampshire residents.