FlexSim (also known as FlexSim Software Products) is a company that develops simulation modeling software solutions. Its products include the OptQuest engine for simulation optimization, the ExpertFit distribution-fitting software to figure out probability distribution for data sets, the FlexSim HC healthcare simulation system to analyze and optimize patient process flow, etc. The company offers consulting, model building, training, and technical support services. FlexSim caters to manufacturing, supply chain, healthcare, warehousing, education, and other sectors.