Paraquat is manufactured by multiple corporations including Blanco, Bonfire Herbicide, Devour, Firestorm, Gramaxone, Helmquat, Para-SHOT, Paraquat, Parazone, Quik-Quat, and Syngenta, amongst others. Paraquat is not an ingredient in Roundup, but is often used in situations where Roundup is no longer effective on certain crops.