ADP APIs span multiple HCM domains such as Human Resources (HR), Payroll, Tax, Time, and Talent. Our APIs are bundled by domain in order to enhance your discovery. We recommend utilizing search and filters to locate APIs across domains. Compare Paylocity vs Paycom Purchasing and implementing the best Talent Management software requires a great deal of consideration as well as comparison of important factors To get an in-depth comparative analysis, we have created a feature comparison that covers the many functionalities Paylocity and Paycom have to offer.Apr 16, 2018 · Over the past decade, Paychex has demonstrated the ability to be the cleaner operator. Despite ADP's enviable dividend streak, Paychex earns better returns on shareowner capital. Paychex, Inc. is an American provider of human resource, payroll, and benefits outsourcing services for small- to medium-sized businesses. With headquarters in Rochester, New York, the company has more than 100 offices serving approximately 670,000 payroll clients in the U.S. and Europe.