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    NCA Alarms

    4.1 (32 reviews)
    Open • 8:00 am - 5:00 pm

    Services - NCA Alarms

    Security system installation

    Security system repair

    Security monitoring services

    NCA Alarms Photos

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    Photo of Ron P.
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    6 months ago

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    1 year ago

    Great service provider at great cost. Been with NCA for over ten years. ADT is very expensive.

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    4 years ago

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    5 years ago

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    7 years ago

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    5 years ago

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    8 years ago

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    11 years ago

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    9 years ago

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    10 years ago

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    12 years ago

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    7 years ago

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    14 years ago

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    14 years ago

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    13 years ago

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    9 years ago

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    11 years ago

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    11 years ago

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    9 years ago

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    Photo of Bryan N.
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    12 years ago

    Installer was easy and breezy; loved the experience. It was Simple and Would recommend to anyone

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    11 years ago

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    12 years ago

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    15 years ago

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    Shooter S.

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    Photo of John S.
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    12 years ago

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    Shooter S.

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    12 years ago

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    10 years ago

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    10 years ago

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    12 years ago

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    12 years ago

    Jerry was amazingly helpful and I would recommend him highly. Made me feel extremely safe and comfortable with the system before he left.

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    12 years ago

    Perfect installation service, good response time, paid for the extras but feel secure!

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    12 years ago

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    13 years ago

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    Ask the Community - NCA Alarms

    Review Highlights - NCA Alarms

    “John and Sam were exactly the guys to trust to set up your security.”

    Mentioned in 4 reviews

    Read more highlights

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    Preventia Security

    Preventia Security

    (9 reviews)

    Today (08JUN20 - Mon) Hugo, alarm technician from Preventia Security of Columbia, TN arrived at my…read morenew home addition on-time and ready to work. Hugo called me first to confirm our appointment (that is a huge "plus" in my book when dealing with technicians knowing they are on the way!) and WAS ON TIME! After Hugo installed the alarm / smoke detector items and keypads, he explained how to use the system fully without "rushing or glossing over" what I needed to know. My work order was not a large dollar amount one and they were "tying into" an existing alarm system. Most alarm companies would probably have tried to "up-sell" me a new, costly alarm control panel or quoted an outrageous price just to get me to decline and look elsewhere . I would like to applaud Preventia Security for sending an alarm professional to attend to my alarm / smoke detector needs. Hugo is a valued team member and an asset to Preventia Security in my opinion. I also would like to acknowledge John, their salesman and Sarah, their scheduler who assisted me in this small, but important alarm / smoke detector job. Both John and Sarah were also tops in their game in terms of communications and responsiveness! Folks, I am pretty critical when it comes to service, value and communications with sales and service related companies. Without any reservations, I can honestly recommend Preventia Security of Columbia, Tennessee for a value priced, headache-free installation of your alarm / smoke detector system. Thank you Preventia Security!

    Michael Beets was punctual (actually early!) and very knowledgeable and explained the issue well.read more

    ADT Security Services - ADT logo

    ADT Security Services

    (43 reviews)

    I was disappointed when I first had my security system installed. I felt I was misled when…read morepurchasing it. I received a call today from the customer advocate team. I once again voiced my concerns and disappointment almost one month later. Thank you Fernando Llados Jr for finally hearing me and for making me feel like a valuable new customer and resolving my issues and concerns. I was ready to cancel and suffer the consequences before he called me. So I rescind my first review and will give 4 stars.

    ADT is one of the worse companies I have ever done business with. I have had to have them come out…read moreon two occasions and got terrible business both times. First with the service department when calling in then with the service man. The second time I asked them to come out and fix my service since neither the front or back door alarm was working and the key pad wasn't even working. They expected me to work on it while they walked me through it. I explained that I am seventy years old and had no desire to try to be the service man. I wanted someone to come out and fix the problem. I spend a lot of money for the last two years for the service. They were supposed to set me up for service and was told it would cost $59. They said it would be on Saturday. Saturday I got a phone call saying they were going to walk me through fixing it myself. I again explained I wanted a service man to come out and fix the problem. I was scheduled for Tuesday. The man came out and worked on the back door and then told me the problem was fixed and started to leave. I caught him in the driveway and had to get him to come back in because the front door still didn't work. He fixed it. Then I got a bill for $190 for the service call. Not the$59 I had originally been told. I have turned them in to the Better Business Bureau for their terrible service.

    FlexAlarms - Your system should be controlled from your phone, not just from your wall.

    FlexAlarms

    (7 reviews)

    Green Hills

    I bought a home in March 2025 where the previous owner had Flex Alarms. We were told by Trent…read morePercival, as was the previous owner, that we could take over the remainder of their contract so they wouldn't be penalized. (March-Sept 2025; they had already paid for 2.5 years) They acted as if this was helping us both out. Then Trent would tell me we will be there on a day at a certain time without asking me first. I had to tell him 3 times that didn't work for me and he couldn't just tell me when he was coming. Once they showed up unscheduled at 7:45am and he texted me that the tech was here. I was leaving for work. 3 other times a tech, Zach, was supposed to come and didn't show up. The front door sensor was broken so it was silently setting the alarm off which wasn't even armed so the police came and multiple times we had to call them off from coming. Jim Anderson, the owner reached out to inform me that if I didn't pay, even though we never had service or even set the alarm, he would be turning me over to his attorney. I explained the situation and even sent him texts proving all this. He said they didn't do anything wrong and asked if we could reset. He didn't care about us or that we were told lies, misinformed, or were trying to help the previous owner not be penalized even though they moved 6 hours away! He has told me I'm not honorable, I'm not following through, and that I will be paying his attorney's fees and costs. Buyer beware!!

    One of the worst companies I've ever worked with. Customer service was horrible. I had to be the…read moreone initiating contact every time. Company customer service will never accept any blame and try to pin it on anyone else they can. Trent Percival was looking to make a quick buck instead of trying to actually help. Never reached out to help until I persistently called to get something done. Wouldn't recommend to anyone looking to have someone that does that their with pride and honesty

    Duncan Security Systems - The Duncan Security Team

    Duncan Security Systems

    (3 reviews)

    I recently moved from the Nashville area and I wish I could have taken Duncan Security with me. I…read morewas very pleased with their company and would highly recommend them. Jody was great helping me with our initial needs and the techs that came out to install the system were professional, willing to answer all of my questions (numerous times until I understood), and very knowledgeable about what they were installing. Another thing that was very important to me was the response time for the call center to contact me when the alarm went off (accidentally numerous of times). It was quick. Within seconds. Thankfully they were false alarms but I knew if I had an emergency they would be quick to respond. AND the call center in US based. The previous person who left a review talked of the contract and not having their money reimbursed. Note that the person broke the contract and didn't have to pay the additional year that really they could have held them to. I'd say that was pretty generous. My experience is that they will work with you if something out of the ordinary comes up - an unexpected move so on and so forth. One thing I don't understand is Yelp shows only one review but if you click on the "reviews not recommended" you will see other reviews and they are all 5 star. I recommend reading those reviews when making your decision. Thank you Duncan Security!

    There is no finer man than Joe Duncan, Jr. He and his team have provided security for my home for…read more25 years. They offer the best in customer service, intelligent planning and installation, and monitoring. I had a question about my system today, and Joe, the OWNER HIMSELF, was here within 30 minutes. Questions answered. My problem(not a systematic one), resolved and I could not be happier. Thank you Duncan Security for the sense of safety and protection you provide. Robin

    NCA Alarms - securitysystems - Updated October 2026

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