APX Alarm entered the home alarm service industry in 1997. It announced its new business partnership with investment banker, Goldman Sachs in 2006. APX acquired a central station from CMS, a wholly owned subsidiary of Protection One in 2009. APX Alarm also supports wireless communication capabilities, and system control via the internet or PDA application.

APX Alarm has faced criticisms regarding the tactics of the company’s door-to-door sales people. Its salespeople tell potential customers that there has been a recent rise of crime in the neighborhood, and claim to be a representative of the potential customer’s current alarm system provider, as among the most common complaints.

APX has responded to complaints in general by stating, “Our entire focus is on providing the best customer service possible and we understand that owning up to our mistakes and making things right when mistakes do occur is a critical component in delivering world-class customer service. When a company is as large as APX Alarm, and employs thousands of people, we do understand that not everything we do is going to be perfect. With that understanding in mind, we take every customer complaint seriously and do everything within our power to satisfy each and every customer.”