Residential Security for family and home

Protect your home, family and possessions with our basic Residential system, or ask us about a custom designed systems specifically tailored to your security needs. More

Commercial Security for small and large business

From small business to high security,
UL Certified Mercantile systems, Intruder Alert will design, install and monitor security and access control for your business around the clock. More

Fire Alarm Systems for family and possessions

Intruder Alert will install smoke and heat sensors wherever they're needed to help us quickly alert fire department or other emergency responders in the event of an emergency. More



Introducing the new Smart Keypad from IAS


Control your system from your cell phone


Meet Intruder Alert Systems of San Antonio

The touch screen on the new Smart Keypad makes arming or disarming your system, and controlling many of your home's electronic functions, as easy as using your smart phone. 


MyAccessTM Messaging lets you send common commands to your home or commercial security system. You can even have alerts sent to you if there's an alarm or other event.


IAS protects homes and workplaces with full service security monitoring and emergency dispatch from our U.L. Listed Central Station in San Antonio. More.

UL Certified Mercantile Systems

These are high security systems as used in banks and high-end retail busnesses where complete security is required, often by insurance companies. Call 210-494-4900 to discuss your security needs.

Download TeamviewerRemote Support

The TeamViewer app lets us "look in" to help resolve problems you may be having with your access control or CCTV systems.