ADT Security - Company History

For over 140 years – from ADT messengers and call box operators to automated homes and businesses – we’ve made protecting and connecting the centerpiece of what we do. Today, our mission remains the same – creating customers for life.

1874 - 1890

1891 - 1909

1920 - 1969

1970 - 1997

2001 - 2011

2012 - Present