Fire alarm companies in San Antonio, Texas

77 fire alarm companies with an active Texas SFMO Fire Alarm Certificate of Registration (ACR) have a location in San Antonio, Texas, as of October 24, 2026. 8 more are elsewhere in Bexar County.

Sale, installation, inspection, testing, monitoring and service of fire alarm and detection systems. Each company below holds an active Texas SFMO Fire Alarm Certificate of Registration (ACR).

Located in San Antonio

Elsewhere in Bexar County

• ADS Security Services IncHelotes
• Alterman IncLive Oak
• Central Texas Fire & Security Solutions LLCSaint Hedwig
• Firetrol Protection Systems IncRichardson
• N8 Fire and Safety LLCSchertz
• Quick Response Fire protection LLCConverse
• SA Fire And SafetyHelotes
• Security One, Inc.Universal City

Also in San Antonio: Fire sprinkler contractors · Fire extinguisher companies

Frequently asked questions

How do I check that a fire alarm company in San Antonio is licensed?

Search the company name or registration number in the Texas State Fire Marshal's Office public lookup (https://appscenter.tdi.texas.gov/reports/p/sfmo). Every company listed here shows its registration numbers and expiration dates, re-checked against state records on each data refresh.

What license does a fire alarm company need in Texas?

Companies doing this work must hold a Texas SFMO Fire Alarm Certificate of Registration (ACR). Texas requires a State Fire Marshal's Office certificate of registration for each type of work: fire alarm (ACR), fire extinguisher (ECR) and fire sprinkler (SCR). Individual technicians must also hold SFMO licenses.

Does a company need to be located in San Antonio to work there?

No. Texas registrations are statewide, so companies based elsewhere in Bexar County or across Texas can work in San Antonio. Confirm the service area with the company.

Listed alphabetically. No company pays to rank higher. Machine-readable: Markdown.