trista Garcia
1 month ago
Commercial Security & Access Control in Colorado
Access control, cameras, alarms and door security backed by 25+ years of experience serving Colorado businesses.
Services
Explore our security services
Commercial access control systems including badge readers, keypads, electronic locks and electrified door hardware.
Commercial Access Control
Commercial security cameras and video surveillance systems designed to improve visibility, protection and control.
Video Surveillance
Commercial alarm systems with intrusion detection, door sensors, motion detection, panic devices and professional monitoring.
Commercial Alarm Systems
Commercial locks, exit devices, electric strikes, mag locks and electrified hardware installed and serviced by professionals.
Commercial Door Hardware
Commercial ADA door operators and accessible door hardware designed for reliable, secure and convenient building access.
ADA Door Hardware
Commercial locksmith services including lock repair, rekeying, master key systems, high security locks and door hardware.
Commercial Locksmith
Professional home security, cameras, alarms, smart locks and access solutions designed to help protect what matters most.
Residential Security
What our clients say
I recently hired Keystone Security Group LLC to upgrade the security and accessibility features at my office building, and I am beyond impressed with the results. Toby installed a comprehensive access control badge reader system that has completely modernized our security operations. Additionally, ...
Bob McDonald
1 month ago
I recently had a security system installed by Keystone Security Group LLC, and I couldn't be more impressed with the level of service I received. From start to finish, the process was seamless. Toby was incredibly knowledgeable, taking the time to explain the entire system in a way that was easy to ...
Wayne DeHerrera
1 month ago
INTEGRATED SECURITY
One Company. One Complete Security Solution.
Why us
Why choose KeyStone Security Group
25+ Years of Hands-On Security Experience
One Partner for Complete Security
Solutions Designed Around Your Business
Serving Colorado's Denver Metro & Front Range
Westminster
Denver
Broomfield
Arvada
Thornton
Louisville
Superior
Golden
Lakewood
Wheat Ridge
Northglenn
Boulder
Aurora
Longmont
Ready to improve your security?
Talk with KeyStone about access control, cameras, alarms, commercial door hardware or an integrated security solution.
Contact Us