Among all policy types, the NAIC Complaint Index shows that Amica has significantly more complaints compared to other top insurance companies. The National Association of Insurance Commissioners (NAIC) is an insurance regulatory organization that protects consumer interests. The complaint index compares a company's performance to other performance of other providers in the industry. Amica's financial stability is fairly good, with an AM's Best rating of A (Excellent). AM's Best is a credit rating agency that assesses an insurance company's ability to pay claims to its policyholders. A company that receives an A++ to B+ is stable in financial strength, while anything lower than a B means that a company is unstable or unable to meet its financial obligations.  While Amica is a legitimate insurance provider, it's important to do your own research to ensure that Liberty Mutual is the right insurance company for you.