Founded in 1980, CompuPay Inc. is one of the largest payroll services providing companies in the United States. Located in San Diego, Calif., it offers payroll and employer-related services, such as workers compensation insurance, employee benefits, retirement plans and Section 125/132 plans for client s business needs. In addition, CompuPay Inc. provides accountant and business partner solutions. Some of its clients include A3 Marketing, Merit Mountainside Hospital, Warren, Averett, Kimbrough & Marino, LLC and Frank, Rimerman + Co. LLP.