5 Best Home Security Systems in St. Louis (2026)

Ranked by real Google ratings and review volume · How we chose

By Brad Smith, Home Services Expert · ✓ Updated November 2026 · 6 min read

We compared 18 home security systems in St. Louis on Google Maps · 5 listed · How we rank

Shopping for home security systems in St. Louis means choosing a company you'll deal with for years, not just a box of sensors. The businesses below hold more than 600 Google reviews between them, with ratings from 4.4 to 4.9, and review counts that run from more than 30 to more than 310, so the stars alone won't settle it.

Short answer: ABF Security in Fenton carries the largest review base, 4.4 stars from more than 310 Google reviews, and says it has been locally owned since 1978. Citywide Alarms (4.8) and iTrue Connect (4.9) hold higher ratings on smaller review counts. No prices are published here, so ask for a written quote and the contract length.

Jump to a business

1. ABF Security
2. Citywide Alarms
3. PASS Fire and Security
4. iTrue Connect
5. ACF Alarm Company
Get listed

Security Companies Compared

#	Business	Rating	Reviews	Best for
1	ABF Security	4.4 ★	318	Monitoring, smart home and commercial	View ›
2	Citywide Alarms	4.8 ★	128	Installs, repairs and home automation	View ›
3	PASS Fire and Security	4.5 ★	71	Camera and system upgrades	View ›
4	iTrue Connect	4.9 ★	39	Camera systems for homes and congregations	View ›
5	ACF Alarm Company	4.7 ★	45	Long-term alarm customers	View ›

5 Best Home Security Systems in St. Louis (2026)

Alarm and camera companies, one at a time

#1 Overall🕑 Open 7 days↩ Responds to reviews

ABF Security

4.4318 Google reviews

ABF Security designs, installs and monitors security systems for homes and businesses from its base in Fenton. Its site lists security systems, an alarm monitoring center, CCTV cameras and smart automation, and says the company has been locally owned since 1978. Google also files it as a fire alarm supplier.

What people praise

Responsive, personal support, including remote troubleshooting by text, according to one reviewer
A system upgrade handled professionally for a long-time customer, per one reviewer
Smart home features built on the Alarm.com platform, per one reviewer
One reviewer describes a customer relationship of almost 15 years

Worth knowing

One lower-rated review concerns contract length and cancellation, so ask for the term and cancellation details in writing

Reputation scorecardrank in St. Louis

Rating4.4 / 5

Review volume318 · 97th

Confidencehigh

Recency3 months ago

Info completenesssite · phone · hours

Rating breakdown83% 5-star

✓ VerifiedSource: Google

Our take: The largest review base, and its site says it has been locally owned since 1978, though a 4.4 is the lowest rating on the page and the reviews are more mixed than the rest. Read the contract terms closely before signing.

Website +1636-349-1090 Directions

507 Rudder Rd, Fenton, MO 63026

#2🕑 Open 5 days/wk↩ Responds to reviews

Citywide Alarms

4.8128 Google reviews

Citywide Alarms is based in Clayton and installs and services security systems. Google lists it as a security system installation service, burglar alarm store, fire alarm supplier and home automation company. Reviewers describe new installs, camera repairs, a revived hard-wired system and security for a retail store.

What people praise

Upfront pricing, according to reviewers
Technicians who explain the options, per reviewers
An old hard-wired system reworked and tied to one touchscreen panel, per one reviewer
Pricing described as the same as or a bit cheaper than national providers, per one reviewer

Worth knowing

Google lists weekday business hours only

Reputation scorecardrank in St. Louis

Rating4.8 / 5

Review volume128 · 92nd

Confidencemoderate

Recency6 months ago

Info completenesssite · phone · hours

Rating breakdown95% 5-star

✓ VerifiedSource: Google

Our take: A Clayton-based installer with a 4.8 and reviews that cover homes and a store. Ask about its hours for service calls.

Website +1314-266-6760 Directions

7733 Forsyth Blvd #1100, St. Louis, MO 63105

#3🕑 Open 5 days/wk↩ Responds to reviews

PASS Fire and Security

4.571 Google reviews

PASS Fire and Security is based in Overland and supplies and installs security systems and fire alarm and fire protection equipment, according to its Google listing. Reviewers mostly describe camera installs and system updates. One reviewer says they were a Biescher customer for years before PASS purchased that company.

What people praise

An installation technician named Bob praised in several reviews for explaining the system
Clean, tidy work and a finished setup that customers could operate themselves
Camera views set up the way customers wanted, per one reviewer
A quick, timely installation, per reviewers

Reputation scorecardrank in St. Louis

Rating4.5 / 5

Review volume71 · 86th

Confidenceearly

Recency3 weeks ago

Info completenesssite · phone · hours

Rating breakdown86% 5-star

✓ VerifiedSource: Google

Our take: A fire and security company that reviewers credit for careful camera and system installs. Its review count is smaller, so read the details.

Website Book now +1314-241-0422 Directions

1938 Innerbelt Business Center Dr, Overland, MO 63114

#4🕑 Open 7 days↩ Responds to reviews

iTrue Connect

4.939 Google reviews

iTrue Connect is a security installer on Marshall Avenue in the St. Louis area. Google lists it as a security system installation service, burglar alarm store and computer networking service. Reviewers describe camera systems installed for individual customers and at a church.

What people praise

Camera picture quality praised as high definition, per one reviewer
A professional crew, according to reviewers
Reasonable pricing, per one reviewer
An owner who is nice to work with, per one reviewer

Worth knowing

Reviews cover camera installs only, so ask about alarm monitoring or other services if you need them

Reputation scorecardrank in St. Louis

Rating4.9 / 5

Review volume39 · 64th

Confidenceearly

Recency4 months ago

Info completenesssite · phone · hours

Rating breakdown95% 5-star

✓ VerifiedSource: Google

Our take: A camera-focused installer with a 4.9 on a smaller review base. A fit when cameras are the goal rather than a monitored alarm.

Website +1314-699-4878 Directions

4340 Marshall Ave, St. Louis, MO 63134

#5🕑 Open 5 days/wk

ACF Alarm Company

4.745 Google reviews

ACF Alarm Company supplies and installs security systems in the St. Louis area from an office on Riverview Drive. Its site offers a free risk assessment, and reviewers mention video doorbells and thermostats added to their systems.

What people praise

Customers who say they've stayed for more than 20 years, per two reviewers
Knowledgeable installation, according to one reviewer
Quick responses to service calls, per one reviewer
A technician who guides customers through problems, per one reviewer

Reputation scorecardrank in St. Louis

Rating4.7 / 5

Review volume45 · 75th

Confidenceearly

Recency4 months ago

Info completenesssite · phone · hours

Rating breakdown91% 5-star

✓ VerifiedSource: Google

Our take: Loyal long-term customers show up in the reviews. Ask about the free risk assessment when you call.

Website +1314-869-8500 Directions

9021 Riverview Dr, St. Louis, MO 63137

Your business here

Get listed on this page, in front of local customers already searching for you.

Claim this spot ›

How the scorecards work

Rating is each company’s live Google star average on the date shown. Review volume is how many customers have rated it. Confidence weighs the rating by that volume, so a 4.4 from hundreds of people carries different weight than a 4.9 from a few dozen. Recency reflects how lately customers are still leaving reviews.

What affects home security pricing in St. Louis?

No prices are published here. Cost depends on the equipment, the number of cameras or sensors, whether you add professional monitoring, and the contract length, so ask for a written quote that spells out each of those.

Where each company is based

ABF Security is in Fenton, Citywide Alarms in Clayton and PASS Fire and Security in Overland. iTrue Connect is on Marshall Avenue and ACF Alarm Company is on Riverview Drive, both in the St. Louis area. Looking for home security near me? Each listing below shows a phone number and directions.

Locksmith Services in St. Louis

What to ask before you sign

How long is the monitoring contract, and what’s the cancellation fee?
Is monitoring required, or can I use the system without it?
Who installs the system, and what warranty covers the work?
Will you give me a free quote or risk assessment in writing?
Can the system connect to my phone and to smart home devices?

Frequently asked questions

Do St. Louis security companies require a long contract?

One reviewer of ABF Security says its monitoring runs on a three- or five-year agreement, and ABF’s reply to that review confirms the agreement has a fixed term. Ask any company for the length, cancellation fee and renewal terms in writing.

Can I get security cameras installed without a full alarm system?

Reviewers describe camera installs at iTrue Connect, camera system updates at PASS Fire and Security and camera repairs at Citywide Alarms. Ask whether monitoring is optional with the setup you want.

Which St. Louis security company has the longest track record?

ABF Security’s site says it has been locally owned since 1978. Reviewers of ACF Alarm Company describe being customers for more than 20 years.

Do St. Louis security companies give free quotes?

ABF Security’s site invites a call for a free quote, and ACF Alarm Company’s site offers a free risk assessment. Ask the others whether they quote at no charge before you book a visit.

Choosing a company

ABF Security brings the broadest review history and smart-home and commercial work, Citywide Alarms, PASS Fire and Security and ACF Alarm Company cover installs and upgrades, and iTrue Connect suits a camera-only job. Whoever you pick, get the contract length in writing.

Best Home Safety And Security in other cities

More categories in St. Louis

Own one of these businesses, or want to be here?

Claim your spot on this page: Basic listing $50 or Premium $100 for the top spot, held a full year. Both include a permanent link to your site.

Get listed See pricing