Below is a list of companies that have become part of American Alarm and Communications, Inc. over the years.
- AAA Custom Alarm Systems
- Advanced Signal Corporation
- Alarm Tech
- Alarms, Inc.
- Alert Security Systems
- Allstate Protection
- Alphatronics Security, Inc.
- Argus Alarm
- Atlas Alarm
- Brothers’ Security
- Burke Security
- Crystal Alarm
- Derba
- DF Richard
- Eaglestar
- Electralarm
- Electro Systems
- Electronic Alarm Systems, RI
- First Stop Security
- H-P Alarms
- Lamprey
- Malfy Alarm
- Monitor Controls, Inc., CT
- National Alarm
- P & J Alarm Co., RI
- P.E. Caruso, Inc.
- Phoenix Fire and Communications, RI
- Phoenix Security Systems, MA
- Riel Security, NH
- Security Design Consultants
- Sentinel
- Summit Security Systems
- Wilko Electric
