General Info Started in the late 1950s, Sonitrol is one of the nation s largest commercial security companies. Located in Phoenix, Ariz., it serves approximately 180 cities throughout the United States and Canada. The company offers integrated security solutions, featuring our unique verified audio detection technology. These are available in the categories of verified audio detection, SonaVision digital video surveillance, intelligent access control systems and fire detection. Sonitrol serves a wide range of industries, including retail healthcare, commercial/office, warehouse/distribution, construction/engineering, government, restaurants, dealerships, faith-based/non-profit, etc.