ADT Inc. is an American company specializing in providing security and protection services for homes and businesses. Founded in 1874, it is known as one of the leading providers of alarm monitoring, video surveillance, fire protection, and smart security solutions. ADT offers services through the installation and management of intrusion detection systems, video monitoring, access control, and other technological solutions that help protect property and individuals. The company has a strong presence in North America, serving millions of homes and businesses, and is expanding its operations into global markets.