Aetna and Cigna are two of the largest health care giants in the United States. AETNA, founded in 1853, is one of the oldest health insurance companies in the country and provides a wide range of health care services to millions of people. Cigna, founded in 1982, is a global health service company that offers health insurance, dental, vision, and other health care services to individuals, families, and businesses. Both companies have a long history of providing quality health care services to their customers.