ADT has been providing residential, small and large business electronic security, fire protection, and other related alarm monitoring services in North America for over 140 years.

The Best Solution to Secure Home

Short History

Everyone knows the ADT symbol – especially burglars – and that’s why you should choose an ADT monitored home security system for your home or business. For more than 130 years, ADT has been the leader in home security and continues to lead the industry with technologically advanced products and programs. Studies show that a home that is not protected by an electronic security system is three times more likely to be targeted by thieves. And thieves know that ADT is the #1 company in the business for comprehensive home protection. An ADT sign outside your home may help keep you safe inside.

An dominant network of monitoring stations

ADT owns and operates a nationwide network of three monitoring stations which are interconnected for complete redundancy. In the event of a major power outage or a natural catastrophe, all alarm signals are automatically forwarded to another station to ensure uninterrupted service.

Over 7,000,000+ customers are using ADT

ADT Security is the largest security company in the U.S. For more than 7 million customers, ADT is their choice for home security.


Local Offices


Years In Business


Monitoring Centers


Supported Devices