Springfield’s #1 and best home security company, Alert 360 started as a small installation and alarm monitoring business in 1973. We have grown to be the 4th largest residential security provider in the nation! Our state-of-the-art home security system technology is available to all in the Springfield area! Home security systems and alarm systems – SAVE up to 25% off RETAIL! Thousands of Springfield homeowners and businesses already rely on Alert 360 alarm systems to protect their families and property. When you see our round green yard signs, you know there are 360 degrees of security surrounding the home or business.