CIGNA is a health insurance company that provides services to individuals, families, and businesses. AETNA, ELLE, and AVIS are all competitors of CIGNA. AETNA is a health insurance company that offers a variety of plans for individuals, families, and businesses. ELLE is a health insurance provider that specializes in providing coverage for small businesses. AVIS is a health insurance provider that offers a range of plans for individuals, families, and businesses. All three companies provide competitive rates and services to their customers.