Paychex is a leading provider of payroll, human capital management, and insurance solutions servicing small and midsize clients primarily in the United States. The company, established in 1979, services over 740,000 clients and pays over 1 in 12 U.S. private-sector workers. Alongside its traditional payroll services, Paychex offers HCM solutions such as benefits administration and time and attendance software, as well as human resources outsourcing and insurance agency services.