1. NCA Alarms

    1. NCA Alarms

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    Nashville, TN

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    NCA Alarms

    4.1 (32 reviews)
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    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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    3 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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    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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    13 years ago

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    13 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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    8 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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    11 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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    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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    11 years ago

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    Shooter S.

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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

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    ADT Security Services

    ADT Security Services

    1.2
    (42 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.

    (1 Star) This has…read morebeen one of the most frustrating experiences I've ever had with a security company. I signed up with ADT 11 months ago because I wanted a complete home security package, including cameras, alarm monitoring, and a smart keypad door lock that I could lock and unlock from my phone. Within just a couple of months, the smart lock stopped working properly. I could no longer control it from the app. At first, I considered it more of an inconvenience than a major issue, so I didn't immediately call to complain. Unfortunately, that was just the beginning. Since becoming an ADT customer, I have spent countless hours on the phone with technical support trying to resolve the issue. ADT has replaced my keypad door lock five different times, and after all of those replacements, they still have no idea what is causing the problem. Instead of fixing the issue, their solution was to remove the lock from my system, give me a partial credit, and expect me to go purchase and install my own door lock--even though the lock was included as part of the package I originally purchased. I found that completely unacceptable. When I signed the agreement, I purchased a complete security system--not a partial one. I asked if I could cancel my service and move to a company that could provide a fully functioning system. I was told that because the rest of the equipment works, I would still be responsible for paying the remainder of my contract if I canceled. I even asked a hypothetical question: if my cameras stopped working and ADT couldn't fix them, but everything else still worked, would I still be required to continue paying under the contract? I was told yes. Unless the entire system stopped working, I would still be obligated to pay for service even if a major part of the system couldn't be repaired. To make matters worse, several technicians told me they would return on specific dates, but they never showed up. The only way I ever found out what was going on was by calling ADT myself. This ongoing issue has also cost me money. I've had to purchase multiple copies of keys because the locks kept failing. There were numerous times we simply left our doors unlocked because we were tired of buying new keys while waiting for another technician appointment. I also purchased batteries five or six different times, trying different brands because I was repeatedly told the batteries might be the problem, when in reality the issue was the defective lock. Now, after nearly a year of dealing with this, ADT expects me to research, purchase, and install my own replacement lock just so my family can safely secure our home. The final straw came when a representative asked whether I had already scheduled an appointment to have their lock removed. I explained that I wasn't going to schedule a removal until I had purchased a replacement lock because, based on my past experience, their technicians frequently failed to return when they said they would. I refuse to leave my family without a functioning lock because of ADT's repeated failures. I have been far more patient than most customers would have been. I've given ADT numerous opportunities to correct this issue over the past 11 months, but instead of providing a working solution, they've shifted the burden and expense onto me while continuing to hold me to a contract. If you're considering ADT because of their smart home features, my experience should serve as a warning. A security company should provide peace of mind--not months of frustration, wasted time, additional expenses, and a system that never works as promised.

    FlexAlarms

    FlexAlarms

    3.9
    (7 reviews)

    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

    Duncan Security Systems

    3.7
    (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

    Vivint

    Vivint

    1.6
    (33 reviews)

    Annoying, persistent door to door sales. They rang my doorbell 3x Wednesday, 3x Thursday, and 2x…read moreFriday. They even ring it super late at night. See attached photo with time stamps of 9:00pm. So unbelievably aggravating and unprofessional. I have two dogs and this is driving me crazy. The 3rd time I answered the door I told them I wasn't interested. Idc if this is a good product or not this late at night door to door sales is so unprofessional.

    I was genuinely excited to move forward with Vivint and have a home security system installed at my…read morepersonal residence. Unfortunately, that excitement quickly turned into disappointment due to misleading information, unexpected fees, and poor follow-through from customer support. My original quoted price and equipment package changed the moment the technician arrived for installation. On top of that, I was informed of additional fees that were never disclosed upfront--including an extra monthly charge for DVR services that had not been mentioned at any point prior. I was led to believe I was getting a complete system at the agreed-upon price, and that simply was not the case. Despite this, I gave Vivint a second chance. After speaking with multiple managers and account representatives, I specifically requested a clear, itemized breakdown of all equipment and costs before proceeding again. I was told this would be sent to me. It never was. Follow-up messages were left on read, with no response. That lack of transparency and accountability sealed the deal for me. If this is the level of communication and customer service provided before installation, I have serious concerns about what support would look like afterward--especially when it comes to something as important as home security! Very disappointing experience overall. Transparency and trust matter, and unfortunately, Vivint failed on both fronts.

    NCA Alarms - securitysystems - Updated July 2026

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