4.6 
134 *The Angi rating for Home Security System Service companies in Gaithersburg, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Home Security System Service needs.
*The HomeAdvisor rating for Home Security System Service companies in Gaithersburg, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Home Security System Service needs.
Last update on June 05, 2026
Serving Gaithersburg, MD and surrounding areas
Approved (Corporate)
In business since 2010
Free estimates
Emergency services offered
"SafeStreets security system is incredibly reliable and easy to use. The app is intuitive, and the home automation features are a game-changer. I love being able to monitor my home from anywhere. Great service all around."
+1
Serving Gaithersburg, MD and surrounding areas
Approved
In business since 1988
Free estimates
Emergency services offered
"Ultra Guard was truly great. They know their products and are extremely professional. We have had them install security systems at our home, horse farm and car warehouse. Can't recommend them enough! We can recommend them without reservation!"
+21
Serving Gaithersburg, MD and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1874
Free estimates
Emergency services offered
"ADT’s security system is incredibly reliable and easy to use. The app is intuitive, and the home automation features are a game-changer. I love being able to monitor my home from anywhere. Great service all around!"
+35
Serving Gaithersburg, MD and surrounding areas
Approved
In business since 2012
Free estimates
Warranties offered
"I have them installed security cameras in my house. The workers were professional and knowledgeable. The equipments of their choice are also good. I paid more than I originally expected, but overall speaking the experience is good and I am comfortable."
Serving Gaithersburg, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2014
Free estimates
Credit card accepted
"I received many helpful hints about security for my business."
+7
Serving Gaithersburg, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2000
Free estimates
Emergency services offered
Upgrade your home with home entertainment and security system installations from our company. We pride ourselves on the quality work we provide, while delivering great customer service! Call -or- click to schedule a free estimate today!\n \n
+5
Serving Gaithersburg, MD and surrounding areas
Approved
In business since 2013
Free estimates
Warranties offered
"Everything went great. Installation of my security cameras looks great. All my questions were answered and great customer service."
+40
Serving Gaithersburg, MD and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
Tomsburg is a cutting-edge surveillance technology that meet the needs of both commercial and residential customers. We stive to provide security that pass on to you, the customer, the very best services that renders the peace of mind you desire while away or at home. We service the Maryland, Virginia, Delaware, and Pennsylvania area with high resolution CCTV surveillance cameras that detect any form of intrusion.
Serving Gaithersburg, MD and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"Bill, the owner, and Brandon, the technician, both provided world-class customer service from start to finish. To begin, Bill stopped by to perform the in-home consultation and provided recommendations on how he could bring my vision to life with indoor/outdoor security cameras. Brandon did an outstanding job with the installation of all of my Google Nest cameras, assisting with camera placement for the best viewing angle, seamlessly fishing the power cables through the walls, and adding a classy touch by installing brush pass-through wall plates. Brandon managed smaller details such as the cable management for the outdoor camera above my garage flawlessly as it was presented in a clean and neat manner. Both Bill and Brandon treated my home as if it were their own and I will definitely seek to work with them again in the future. Candidly, I had another in-home consultation conducted by one of the big box retailers to help with this project prior to looking to Home Advisor, but I was so disappointed with that experience that I'm glad that I was paired up with NexImage Inc. If you are looking for service professionals that will get it right the first time, look no further than NexImage Inc. Thank you again Bill and Brandon!"
+25
Serving Gaithersburg, MD and surrounding areas
Approved
In business since 2017
Free estimates
Credit card accepted
"Very professional company. They make sure you are happy at all times-and explain the entire process. Their camera system have given me extra security at night time Would highly recommend."
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