Residential Security for family and home

KeypadProtect 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

Security for small and large business

Dome CameraFrom 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

Fire Alarm IAS installs smoke and heat sensors wherever they're needed to help us quickly alert fire department or other emergency responders in an emergency. More

Control your home electronics from the new Smart Keypad


Control your home system with our Virtual Keypad app


Meet Intruder Alert Systems of San Antonio

7800 Series Keypad           virtual_keypad_intro           Intruder Alert, San Antonio

Contact us to secure your home or business with any of these features by clicking here.

UL Certified Mercantile Systems

These are high security systems 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.

Remote Support

Download TeamviewerThe TeamViewer app lets us "look in" to help resolve problems you may be having with remote access to your security system.