Sigmaproeng is perceived as one of Janstar Janitorial Service's biggest rivals. Sigmaproeng was founded in 2000, and its headquarters is in Fort Worth, Texas. Like Janstar Janitorial Service, Sigmaproeng also works within the Professional Services field. Sigmaproeng has 30 more employees than Janstar Janitorial Service.
AccuMold Holdings is one of Janstar Janitorial Service's top rivals. AccuMold Holdings is a Private company that was founded in 1985 in Ankeny, Iowa. Like Janstar Janitorial Service, AccuMold Holdings also competes in the Computers, Peripherals, Networking and Electronic Equipment sector. Compared to Janstar Janitorial Service, AccuMold Holdings has 350 more employees.