April 2026
John is a great small business owner! He is hands on, personable, knowledgeable and competitive! I have used him for years and refer him to anyone I know that needs an alarm or a camera system.
April 2021
John is the best around. Keystone Security provides on-time and reliable security, expertise, and support for your business unlike anyone else. Polymer Engineered Products, Inc highly recommends Keystone Security!
October 2019
My home alarm was triggered on a Sunday evening and I was contacted by the monitoring center in under a minute. I was home at the time and was the one that caused the alarm. The Keystone team has always been helpful and they make me feel like a valued customer. I continue to recommend them to friends.
