Protecting What Matters Most — Around the Clock
From burglar alarms to video surveillance and managed access, Alarm 24 delivers reliable, professionally monitored security for homes and businesses across the Greater St. Louis area.
Available 24/7 — Serving the Greater St. Louis area since 1972
Security Solutions That Work
From access control to 24/7 monitoring, we deliver integrated security systems tailored to your property.
Access Control
Manage who enters your building with proximity cards, biometrics, and keypads — no more changing locks.
Learn MoreVideo Surveillance
Analog, IP, and HD cameras with DVR/NVR recording and remote viewing from any device.
Learn MoreBurglar Alarms
Professionally installed and monitored alarm systems for homes and businesses with 24/7 response.
Learn More24/7 Monitoring
Our local UL-certified central station watches over your property around the clock — every day of the year.
Learn MoreWhy Choose Alarm 24?
We combine decades of experience with modern technology to keep your property safe.
Proven Track Record
Since 1972, Alarm 24 has protected thousands of properties across the St. Louis metro. Over 50 years of hands-on experience means we've seen — and solved — every security challenge.
True 24/7 Support
Our local UL-certified central monitoring station operates around the clock, every day of the year. When an alarm triggers, we dispatch help immediately — not a call center in another state.
Residential & Commercial
Whether you're securing a family home, an office building, or a multi-site operation, we design cost-effective systems tailored to your exact requirements and budget.
Technology That Works for You
From IP cameras with remote mobile viewing to card-access systems that replace every lock, we install modern technology that's simple to use and easy to manage.
Ready to Secure Your Property?
Get a free, no-obligation security consultation. Our team is available 24/7.
Get a Free Security Assessment
Not sure where to start? Fill out the form and one of our security consultants will reach out to discuss the right solution for your property — no pressure, no obligation.
- Free on-site consultation
- Custom system design & proposal
- Transparent, competitive pricing
- Professional installation by licensed technicians