What are the main differences between credit unions, banks and life insurance companies in how they serve the financial system?

While banks and credit unions are both financial institutions that offer similar services (checking and savings accounts, auto loans, and mortgages), the main difference between a bank and a credit union is that "customers" of a credit union are members, and they own the institution. A bank is a company, and like most companies, a bank aims to maximize profits for its shareholders. A credit union is a cooperative - and often not-for-profit - institution that is owned by its members (customers) who democratically elect a board of directors. Credit unions tend to focus on members' needs and attempt to provide credit at reasonable rates. There are pros and cons to participating in either financial institution.