About Us
Protecting the St. Louis Area Since 1972
Alarm 24 is a locally owned security integrator with over 50 years of experience designing, installing, and monitoring alarm systems for homes and businesses.
Our Story
Founded in 1972, Alarm 24 has grown into one of the most trusted privately owned security companies in the region. What started as a team with deep expertise in infrastructure and information technology evolved into a full-service security integrator — providing intrusion systems, CCTV, fire alarm, and access control solutions for thousands of clients.
Our management team brings over 50 years of combined experience to every project. That depth of knowledge allows us to engineer effective, cost-efficient solutions that leverage the latest technology while delivering the best return on your investment.
Today, Alarm 24 serves a wide range of commercial, industrial, and residential clients across St. Louis, St. Peters, St. Charles, and the surrounding metro area. From our offices at 412 South Church Street in St. Peters, we provide sales, installation, service, and monitoring — all under one roof.
Locally Owned & Operated
Based in St. Peters, MO — not a national franchise. Your security is managed by people who know your community.
Full-Service Integrator
We handle everything: consultation, system design, professional installation, and ongoing service and monitoring.
Industry Memberships
Alarm 24 is a member of the National Fire Protection Association (NFPA) and the National Burglar and Fire Alarm Association (NBFAA).
Lasting Relationships
We don't just install and leave. We build long-term partnerships with our customers, providing proactive service and support for years.
Our Philosophy
At Alarm 24, we seek to form strategic, lasting relationships with our customers. We share the benefit of our experience to engineer effective, cost-efficient solutions that provide the latest technology and the best return on your investment. Your security and peace of mind is our business.
Mission
Alarm 24 is a security systems integrator providing digital video recording, access control, security systems, and fire systems. We serve a wide range of commercial, industrial, and residential clients in the St. Louis metro and surrounding areas.
24/7 Support
Alarm 24 is fully licensed to provide sales, installation, service, and alarm monitoring. Our operations fully comply with all required regulations and meet the industry's highest standards. Whether you're at home or away, day or night, our trained professionals are always keeping a close eye on your property.
“I enjoy monitoring my home and office with the A24 Interactive App. Not only is it convenient, but it gives me real peace of mind for my home and office.”— Thomas Kirgin, Alarm 24 Customer
Join the Alarm 24 Family
Experience the difference 50+ years of security expertise makes. Contact us for a free consultation.