Protecting
St. Louis
Since 1971
55+ years of locally owned security excellence. From a single family home to a multi-site enterprise — Philibert Security delivers the most trusted alarm monitoring and protection in the St. Louis metro area.
What We Do
Complete Security Solutions
for Every Need
From single-family homes to large commercial facilities, we design, install, and monitor comprehensive security systems tailored to the St. Louis metro area.
Commercial Security
Comprehensive intrusion detection and alarm systems designed for businesses of all sizes. Protect your assets, employees, and operations around the clock.
Commercial Security
Commercial Fire Detection
NFPA-compliant fire alarm systems for commercial and industrial properties. Early detection saves lives and minimizes property damage and downtime.
Commercial Fire Detection
Card Access & CCTV
Advanced access control and high-definition surveillance camera systems. Know exactly who enters your facility and maintain a complete video record.
Card Access & CCTV
Residential Security & Home Automation
Smart home security with interactive monitoring. Arm, disarm, and check your system from anywhere using your smartphone with real-time alerts.
Residential Security
Residential Fire Detection
Protect your family with professionally installed smoke detectors, heat sensors, and carbon monoxide detectors connected to our 24/7 monitoring center.
Residential Fire Detection
Low Voltage Wiring
Professional structured cabling for security, audio/video, networking, and data systems. New construction and retrofit installations for commercial and residential properties.
Low Voltage Wiring
Laboratories
Security Assoc.
Protection Assoc.
& Fire Alarm
International
Why Philibert
Locally owned & family operated, Philibert Security Systems, Inc.
has been providing honest & trustworthy residential & commercial burglary & fire protection since 1971. Need security?
Give us a call as we are always Looking Out For You™
24/7/365 Response
Our UL-listed central monitoring station never sleeps. Day or night, holidays included, we respond to every alarm within seconds.
Locally Owned & Operated
We're your neighbors. When you call, you talk to a real St. Louis person who knows your community, not a call center in another state.
Top-Tier Equipment
We install only professional-grade equipment from industry leaders including DSC, Bosch, Honeywell, and more. Built to last, built to perform.
Interactive Monitoring
Control your system, check camera feeds, and receive instant notifications from your phone. Security intelligence in the palm of your hand.
Customer Reviews
Trusted by St. Louis Families & Businesses
55+ years means generations of customers who've relied on us — and keep recommending us to their neighbors.
"We've had Philibert monitoring our warehouse for over 12 years. When we had a break-in attempt at 2am on a Sunday, they had police on-site in under 4 minutes. Nothing was taken. That response time is the whole point."
"After a neighbor's house was burglarized, we finally called Philibert. The install was done in one day, the tech explained everything clearly, and the app is genuinely easy to use. My mother-in-law even figured it out. Highly recommend."
"Our fire suppression system failed an inspection because the previous vendor used equipment that was out of code. Philibert came in, did a full assessment, and had us compliant within two weeks. Our insurance carrier was thrilled."
"We manage 14 commercial properties across St. Louis. Philibert handles monitoring for all of them from a single account. One call, one invoice, one relationship. Tried a national company first — the difference is night and day."
Digital Security Matters Too
We Take Every Layer of Security Seriously
If we're going to protect your property, our own infrastructure has to be held to the same standard. This site runs on pqcrypta-proxy — our Rust-built reverse proxy. Every defense in the Connection Inspector to the right is live and active right now.
HTTP/3 + QUIC
UDP-based transport with TLS 1.3 baked in from the first packet. No TCP handshake, no legacy cipher fallback, no head-of-line blocking.
Post-Quantum Encryption
X25519+ML-KEM-768 hybrid KEM. Quantum-safe now — not an upgrade for later. Session tickets wrapped with ML-KEM-1024.
Live WAF — Block Mode
19 OWASP rule sets active in hard block mode. SQLMap, Nikto, and Burp Suite fingerprints dropped at the TLS layer before touching the application.
Strict CSP + Reporting
Every resource source is allowlisted. Inline execution blocked by policy. Injection attempts reported to our endpoint in real time.
Full Security Header Stack
HSTS preload, COOP, COEP, X-Frame DENY, nosniff, Referrer-Policy, Permissions-Policy, NEL, and Report-To — all active on every response.
Rate Limiting & DoS Shield
Token bucket + sliding window rate limits keyed on IP, fingerprint, and JWT. Error-rate auto-blocking and DoS protection on every connection.
Common Questions
Frequently Asked Questions
See It in Action
Watch How We Protect St. Louis
From monitoring center tours to live installations — see what professional security looks like.
Alula App Walkthrough
A complete getting-started guide for new Interactive users — arm/disarm, cameras, and smart controls from the Alula app.
Checking the Trouble Light (DSC)
What the yellow triangle on your DSC keypad means and how to identify the trouble condition it's reporting.
Resetting Date & Time (DSC)
Clear the trouble light after a power outage by resetting the date and time on your DSC system.
24/7 Central Monitoring
Professional Alarm Monitoring
Starting price — no long-term contract required on select plans