Security System Supplier · St. Louis, MO
| Monday | 8:00 am - 5:00 pm |
|---|---|
| Tuesday | 8:00 am - 5:00 pm |
| Wednesday | 8:00 am - 5:00 pm |
| Thursday | 8:00 am - 5:00 pm |
| Friday | 8:00 am - 5:00 pm |
From Google, checked May 2026.
Citywide Alarms installs burglar alarms and security cameras for houses and businesses around St. Louis. The company says its systems let you run your place from your phone and get custom alerts when something happens.
It also describes a smart home side, tying thermostats, smart locks and video doorbells into the same setup. On the commercial end, the company says it designs, installs and services fire alarm systems for buildings from small offices up to multi-tenant sites. Its website lists routine inspection and testing for those systems too.
The company describes itself as family-owned, with a second office in St. Charles. It offers free estimates for new systems.
Citywide Alarms keeps weekday hours, open 8 am to 5 pm Monday through Friday. It holds a 4.8 rating across 128 Google reviews.
Many reviewers mention professional, friendly technicians who take the time to explain how the new system works. Several also point to clean, tidy work and a responsive office, and two say the pricing felt fair.
St. Louis gets 43.8 inches of precipitation a year, per NOAA normals for 1991 to 2020. The city counted 278,144 people in 2025, per the Census Bureau.
The office is closed on weekends, so set up your free estimate on a weekday and have your questions about your current setup ready.
We specialize in the installation of home alarms, business alarms and security cameras in the Greater St. Louis Area. We offer Smart Home Automation features like Video Doorbells, Smart Door Locks, Garage Doors, Thermostats, Lights and more. With our systems, you are able to manage your home or business from your smartphone and receive custom alerts and notifications.
From the business's Google listing, checked Oct 2026.
From the business's Google listing, checked Oct 2026.
I’ve been a customer for years now! Great service and love that it’s a local company!
Just used them again, they secured our house and now secured our new retail store. Very straight forward pricing. Workers are very professional too
We've been using City Wide alarms for about 18 months now for our business, and the service has been nothing short of incredible! Both the customer service and the security are top notch!
These quotes come from Google Reviews and belong to their authors. They can be out of date. Ask for a correction or removal.