Upgrade Your System Before The "3G Sunset"
The nationwide switch to LTE means your 3G security system will no longer have a wireless network in order to communicate, leaving you unprotected. Conveniently upgrade your 3G system to fast and reliable LTE through either the replacement of your communicator or with our LTE security package!
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Home Security Starting At Only $24.99 / month
Without a modern security system in your home, your personal safety and valuables are at risk. SentinelSafe™ Home Security is smarter, affordable, and accessible. At Sentinel the Alarm Company, we are ready to stand guard 24-hours a day whether you are at home, at work, or away.
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Business Security Starting At Only $34.99 / month
Every business has unique security concerns. SentinelSafe™ Business Security is smarter, affordable, and accessible. At Sentinel the Alarm Company, our systems experts can develop the best solutions to protect your business, employees, inventory, and confidential data.
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Flexible Options To Secure Your Home Or Business

I need a professional to install a new security system

Our security experts are experienced and knowledgeable in the high-quality products that we sell to insure the quick and correct design and installation of your new system. Contact us today to speak with a Sentinel representative about getting secured, or learn more about our starter security packages. At Sentinel, your security is our priority!

I need to upgrade or repair my current system

Our qualified technicians can add new features to your security system with no added stress to you. We pride ourselves on providing “no worry” maintenance before, during, and after installation. After our technicians complete the job, you will have peace of mind knowing that your system will continue to work as promised. Contact us today to find out what new features are available.

I need monitoring service for my current system

Some home and business owners already have a professional security system in place. However, it may be outdated, still connected to expensive telephone lines, or no longer monitored – leaving you vulnerable. We are ready to get you connected and monitored from our local 24-hour central station. Contact us today to set up monitoring service.

Get Started With A Home Or Business Security Package

We are offering a Free Wireless Camera Device when you sign up for a Home or Business security system + monitoring package! Get started with connected devices, 24/7 emergency response, and complete peace of mind about your home or business when you’re not there.

Our Connected Suite Of High-Quality Security Products

Alarm.com Security Camera | Dallas-Fort Worth Video Surveillance Security Systems

Video Surveillance

HD quality wireless cameras provide crystal clear video feeds accessible from your smart phone.

Access Control & Door Locks

Remotely lock or unlock doors, receive alerts, and control when people can come and go.

Intruder Detection

Receive alerts for unexpected events like a door or window opening at an unusual time.

Wireless Connected Panel

Get 24/7 panel monitoring with a dedicated, tamper-resistant cellular connection.

FOR HOME

Carbon Monoxide, Fire & Flood Protection

Ensure complete security with connected carbon monoxide, smoke, and flood detectors.

Silent Knight Fire Pull Station | Fire Alarm and Sprinkler Protection & Inspection For Businesses

FOR BUSINESS

Fire Alarm and Sprinkler Protection & Inspection

Ensure compliance with U.L. Listed fire alarm monitoring and inspections.

Smart Home Thermostat | Dallas-Fort Worth Home Security Automation Systems

Automation Systems

Program customized light and thermostat sequences to create energy savings.

Proudly Securing Dallas-Fort Worth For Over 50 Years

Since 1968, Sentinel the Alarm Company has provided effective security solutions to thousands of homes and businesses in the Dallas-Fort Worth Metroplex. Characterized by outstanding service before, during, and after installation, the sales representatives and expert technicians of Sentinel are available to make sure you are well taken care of 24/7. 

What Makes SentinelSafe™ Security Different?

Family Owned & Operated Since 1968

Now run proudly by our second generation of security systems experts.

"No Worry" Maintenance Service

Our technicians are the best at maintaining security systems with no added stress to you.

Licensed & Insured Technicians

All Sentinel technicians are FBI background checked, drug-tested, and continuously recertified.

Local, State-Of-The-Art Monitoring

Our dispatchers have maintained a track record of uninterrupted excellence since 1989.

Easy Equipment Financing

Equipment financing can help you benefit from Section 179 tax advantages.

Security Association Leaders

We are active members in the top Dallas-Fort Worth alarm associations.

Dallas-Fort Worth's Trusted Security Systems Experts

See what our satisfied customers are saying

Patricia GPatricia G
15:51 11 Feb 22
Let me tell you about a positive experience I had had recently as your Service Manager, Donny, was finishing up with upgrading my Sentinal Alarm System. As we began to settle my bill, I began to cry uncontrollably. Donny was very supportive of my personal crisis and offered to keep me in his prayers. Later that day, I began to feel better. Donny thinks outside the box, which, in my opinion, is the best kind of employee for a company to have. Thank you Donny, for your healing prayers and for thinking outside the box.
Jaycile BrannanJaycile Brannan
22:16 17 Jan 22
We have used Sentinel for 20 years. They have done a great job. They are very responsive to our needs and Donny has always done a fantastic job for us. We highly recommend Sentinel
Gaynell KellumGaynell Kellum
12:41 20 Aug 21
Donny did a great job for us! He is so knowledgeable and personable. We couldn’t be happier with the service!
Anne LongAnne Long
18:19 17 Aug 21
Chuck was great- the nicest man. Thorough and took the time to make sure I understood my new system.A positive experience from start to finish with Sentinel. Highly, highly recommended!
Jan FletcherJan Fletcher
12:13 08 Jun 21
These people are great. Very responsive and timely.
Dan GoldDan Gold
21:21 24 May 21
Mike did a quick diagnostic and was able to fix my repair without any issues. He was courteous and very professional. I would highly recommend this company and Mike for any alarm issues.
Patricia GPatricia G
15:51 11 Feb 22
Let me tell you about a positive experience I had had recently as your Service Manager, Donny, was finishing up with upgrading my Sentinal Alarm System. As we began to settle my bill, I began to cry uncontrollably. Donny was very supportive of my personal crisis and offered to keep me in his prayers. Later that day, I began to feel better. Donny thinks outside the box, which, in my opinion, is the best kind of employee for a company to have. Thank you Donny, for your healing prayers and for thinking outside the box.
Jaycile BrannanJaycile Brannan
22:16 17 Jan 22
We have used Sentinel for 20 years. They have done a great job. They are very responsive to our needs and Donny has always done a fantastic job for us. We highly recommend Sentinel
Gaynell KellumGaynell Kellum
12:41 20 Aug 21
Donny did a great job for us! He is so knowledgeable and personable. We couldn’t be happier with the service!
Anne LongAnne Long
18:19 17 Aug 21
Chuck was great- the nicest man. Thorough and took the time to make sure I understood my new system.A positive experience from start to finish with Sentinel. Highly, highly recommended!
Jan FletcherJan Fletcher
12:13 08 Jun 21
These people are great. Very responsive and timely.
Dan GoldDan Gold
21:21 24 May 21
Mike did a quick diagnostic and was able to fix my repair without any issues. He was courteous and very professional. I would highly recommend this company and Mike for any alarm issues.
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24/7 Emergency Services Available

Speak With A Sentinel Security Expert.

Please give us a call, or fill out this form and a Sentinel security expert will call you promptly.

Our expert sales and service staff is available during regular business hours from 8:00am to 5:00pm Monday through Friday to assist you. If you have an after-hours request, a technician will be dispatched to contact you, and respond to your location with a fully-stocked service vehicle if needed. Our goal is to keep your security systems and services operating 24/7.

Corporate Office

Local: (972) 644-6866

Toll-Free: (800) 275-6866

Monitoring Center

Local: (972) 644-9575

Toll-Free: (800) 713-6475

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