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Certified Installer For
Reliable home and business security systems for Key Largo and surrounding areas.
AlarmOne provides professional security systems for homes and businesses throughout the area. Whether you're protecting a residence, retail space, office, or multi-location operation, your system should deliver reliable performance and be easy to manage.
We design systems that improve visibility, control access, and help you stay aware of activity on your property, whether you're on-site or away. From installation to ongoing service, our team focuses on solutions that work consistently in real-world conditions.
Already have a security system in place? We can take it over and improve performance.
Our team evaluates your setup, reviews coverage and compatibility, and integrates your system into a platform that is easier to manage. In many cases, this can be done without replacing your existing equipment.
24/7 Professional Monitoring
Home Security Installation
Smart Locks and Access Control
System Upgrades and Takeovers
Video Doorbell Cameras
Good service and on time as usual. Located the problem and resolved it. He is an asset to the company.
Best alarm company and Dax is, by far, the best technician who takes his time to explain and cleans up after!
The technician (Javier) maintained exemplary and professional services at all times. The Smith family
Once again 100% satisfied with Alarm One. Lenny is the best, he explains everything to me so that I understand what the problem is. Our cameras are always back up and running in no time. Thank you Alarm One
Best decision I made during my renovation. They installed my alarm 10 years ago at a very reasonable price and have been maintaining and upgrading my security system since to my complete satisfaction. Wry knowledgeable and professional.
love their customer service and prices. always cheapest rates and quality service.
My technician has always been friendly, curious and always has a smile on his face. You can ask any questions and he is eager to answer you. He is one of the best 👌 👍
DAX has always been extremely professional, timely, informative, pleasant and efficient. I have used him for 15+ years and trust him implicitly,.I know he truly has my best interests at heart. We wholeheartedly recommend him to anyone.
Very professional and fantastic customer service. We have utilized them for personal and business and can accommodate both!
I have been a loyal customer of Alarm One for more than 12 years. Every interaction, from sales to service to monitoring, is always beyond my expectation. I highly recommend them without hesitation.
Certified Installer For
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