ADT is a U.S.-based provider of smart home and business security systems, combining technology with professional installation and around-the-clock human monitoring. The company traces its origins back 150 years to telegraph-based communication services and has since grown into what it describes as America's leading security provider, operating the largest network of smart home security professionals in the country and serving millions of customers nationwide.
Its core offerings span residential and commercial security, encompassing smart home integration, AI-powered automation, and professional installation services. ADT's model pairs hardware and software with ongoing human expertise - from initial setup through continuous monitoring - with the stated goal of delivering both safety and peace of mind. The company's iconic yard sign has become a widely recognised brand marker across the United States.
ADT operates across two primary markets: residential customers, including homeowners and families, and commercial clients seeking business security solutions. The company also runs ADT Safe Places, a philanthropic programme. Internally, ADT emphasises a culture centred on trust, integrity, and customer-first values, and describes its employees using the term "Everyday Heroes." The company states it offers competitive benefits, career development pathways, and a diverse and inclusive working environment.
