Security that feels effortless.
Reliant Security designs, installs, and services security and low-voltage systems for homes, custom homes, multi-family, commercial, industrial, and government facilities — backed by 24/7 professional monitoring.
Backed by a nationwide professional monitoring network
Figures reflect the Becklar professional monitoring network — the UL-certified, fully redundant central-station infrastructure that monitors Reliant customers' systems.
One local team, from a single home to a full industrial site
Reliant Security is a locally owned security and low-voltage integrator. We design, install, and service everything here — so whether you need an alarm on a house or surveillance, access control, and fiber across a manufacturing plant, it's the same team and the same standard.
Residential Security
Monitored alarms, cameras, and smart control for single-family homes, custom homes, and multi-family properties.
Commercial Security
Offices, retail, healthcare, and warehousing — systems designed around how the building is actually used.
Industrial & Government
Large plants, manufacturing sites, and Federal, State, Municipal, and DoD facilities — including NDAA/TAA-compliant equipment.
Video Surveillance
Hardwired and wireless camera systems, from a single doorbell to site-wide industrial coverage.
Access Control
Keyless entry, mobile credentials, role-based permissions, and a full audit trail on every door.
Structured Cabling & Fiber
Cat6/Cat6A, fiber, racks, and pathways — certified, labeled, and documented infrastructure.
Audio/Video
Distributed audio, displays, and conference-room AV for homes and businesses alike.
24/7 Professional Monitoring
UL-certified central-station monitoring for intrusion, smoke, and carbon monoxide, every hour of the year.
What we protect
End-to-end security and low-voltage systems, designed around how your home or facility actually operates.
Industries we serve
From a single home to a manufacturing plant or a government facility — security tuned to the threats your sector actually faces.
Proven on real projects
From industrial plants to commercial buildings and homes — see what we design, install, and stand behind.
Site-wide video surveillance for a hot-dip galvanizing plant
Industrial-grade camera coverage across production, dock, and yard areas at an active galvanizing facility.
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Production and yard surveillance for a galvanizing operation
Full-site video coverage spanning the production floor, loading areas, and outdoor material storage.
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Industrial surveillance across a multi-building galvanizing site
Camera coverage and supporting network infrastructure connecting separated buildings on one industrial campus.
View projectTrusted by homes and businesses
Rated 5.0 out of 5 from 52 Google reviews.
“We had a great experience working with Dave and the Reliant team. From start to finish, the communication was clear, professional, and consistent. The crew showed up on time, worked efficiently, and made sure everything was completed the right way. The quality of the installation really shows. You can tell they take pride in their work and pay attention to the details. Dave followed up afterward to make sure we were happy, which speaks a lot about their customer service and commitment. I would absolutely recommend Reliant to anyone looking for a company that stands behind their work and delivers on what they promise.”
“We came to Dave with a unique set of safety & security concerns for our son with a rare genetic disorder, Prader-Willi Syndrome. Dave was thorough in researching the best fit for our family & presented multiple options to fit our family's specific needs. From consultation to cleanup, Dave was very attentive & personable; truly a pleasure to have working in our home. Installation was flawless & WOW the quality of the system is truly impressive! We are very pleased with Reliant & would highly recommend their services for your safety & security needs.”
“Excellent work, Dave is a great guy and does spectacular work. The install couldn’t have gone better A+ recommended!”
“Dave is the best in the business for home security. He installed a whole home security system in our home in St. Charles. The cameras are crystal clear, installation was perfect and the price was great! We wanted to work with a local, family-owned company for our home security, and as a father, I wanted to work with a family man that takes home security as seriously as I do. Couldn't be happier with the service, thanks Reliant!”
“Great experience! Very knowledgeable, professional and punctual. Awesome communication throughout. I highly recommend reliant!”
Reviews from Google, shown as written by their authors.
Serving the greater St. Louis area and multi-site customers throughout the US
Reliant is locally owned and operated out of O'Fallon, Missouri, serving homes and businesses across the St. Louis metro. For commercial, industrial, and government customers we work nationally — standardising security, surveillance, and low-voltage systems across multi-site estates wherever those sites happen to be.
Serving 147 communities across the greater St. Louis area.
Reliant FAQs
How fast is your monitoring response?
Does Reliant offer 24/7 emergency service or technical support?
Do I need to sign a contract?
Do you only work on homes, or commercial projects too?
Can I keep my existing equipment?
Are you tied to one manufacturer?
Explore our services for system-specific questions, or contact FAQs for service areas and consultations.
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Get a same-day quote
Tell us about your project and we'll put together a detailed proposal. No obligation, no pressure — just a straight answer on what it will cost.