We've been proudly serving the Greater Saint Louis Area for years. We are committed to providing only the best service and equipment to our customers. We are a family and locally owned business. We offer the most innovative equipment that the security market has to offer.. Citywide Alarms offers the most advanced Security and Home Automation equipment that the market has to offer. With a Citywide Alarms security system you will be able to control your system using your smartphone from anywhere.