Get FREE Standard Alarm Installation * with promo code UnitedWeStand23

*Wireless Alarm Installation. Limited-time offer.

Home Security You Can Count On

Plans start at JUST $30.99/mo with NO Contract unlike the other guys

  • NO Installation Fee *

  • NO Activation Fee

  • NO Hidden Fee

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How to get started?

Request Quote Online

We have many options for customized systems such as cameras, motion sensors, tilt sensors, thermostats, deadbolts, window & door sensors, automated garage door openers, automated lights, and much much more.

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On-Site FREE Security Assessment

  • Our experienced security professionals will visit your premises to conduct a thorough assessment of your property, identifying vulnerabilities and recommending suitable security solutions.
  • We will discuss your security goals and preferences in further detail during this visit.
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Scheduling Installation

  • Once you have reviewed and accepted the quote, we will work with you to schedule the installation of your security system.
  • Our installation team will coordinate with you to determine the most convenient time for the installation to minimize disruption to your daily activities.
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24/7 Monitoring Service

  • As part of our comprehensive security solutions, we provide 24/7 monitoring services.
  • During installation we will setup the monitoring service, which includes connecting your security system to our central monitoring station.
  • Our team will ensure that your security system is fully operational and integrated with our monitoring services for 24/7 security monitoring.
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Don’t leave your family’s safety to chance. Get a Free Quote Now

Building Smarter Homes and Businesses

Take a smarter approach to home and business security with STL Alarm Co.  Our industry-leading technology delivers security solutions that protect from intruders, vandalism, theft, and unexpected activity.


Security Solutions

If your looking for quality commercial security solutions in the O’Fallon, MO,  St Louis, St Charles and surrounding areas, give us a call. We have been proving Information Technology systems for over a decade and have partnered with local businesses to deliver expert commercial security solutions. Our experience in finding the right security solutions for our clients has been one of our biggest strong-point, while we also offer the most affordable rates in the industry. We offer a whole host of commercial security solutions that include the likes of video surveillance, access control systems, automated A/C system and fire detection systems.

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IP Camera Services

IP security cameras are the most popular and effective surveillance solutions available. Whether you’re upgrading your old analog system or looking for a new security system for your business, STL Alarm Co brings you commercial-grade IP surveillance cameras that ensure you stay connected from anywhere you go, .  Our Dahua IP cameras and NVR systems are proven and used in thousands of applications – both large and small.

We have a superior range of high definition indoor and outdoor IP cameras that are designed to connect with your smartphone, tablet, or PC to ensure real-time video monitoring from any location in the world.

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Experience Ultimate Convenience with Smart Garage Doors

Gone are the days of worrying about whether or not you closed your garage door. With our smart garage door solutions, you can control, monitor, and automate your garage door from anywhere, at any time, right from your smartphone.

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Experience Unmatched Security and Convenience with Smart Door Locks

Forget the worries of lost keys or unauthorized access. Our smart door locks offer keyless entry, remote access, and real-time monitoring – all at your fingertips. You can unlock or lock your door from anywhere, at any time, right from your smartphone. smart lock and door

VoIP Phone Systems

Whether your are a small business of 5 people in an office, a larger business with 100 or more people, or just 10 people spread across the country, it’s never too late to consider switching to the right business phone service for you. A VoIP phone service specifically tailored for the way your business operates can give you and your employees incredible benefits in the workplace.

Replace your business phone system with a future-proof VoIP solution that is hosted entirely in the cloud. You get all of the functionality you would expect from an on-premise enterprise PBX, along with productivity-enhancing features made possible with our cloud platform. Best of all, all of this can be had for a price that saves you up to 80 percent on your current phone bill.

Smart Business VOIP Phone Plans start at $18.95 per phone with NO contracts.

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Managed IT Services

Offering online support as well as traditional in-office visits, we are providing small business owners a piece of mind knowing the core of their business in being properly managed.  Our trained technicians will ask what you’re having trouble with before taking action to ensure your business’s needs are met. Based on your current configuration and looking ahead to plan for your company’s growth, our knowledgeable techs are available for consultations and can point you in the right direction.

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