Some midmarket HR systems come without real expertise in HCM solutions. Others substitute partnerships for actual integration. And some simply put an attractive user interface over a cobbled-together set of legacy solutions. That can mean higher risk, complexity, and lower productivity. But Paychex Flex® Enterprise delivers one of the most comprehensive mobile and cloud-based technology suites available — built around a single source of real-time employee data, backed by 40 years of stability and innovation, and supported by our unique service model.