| Business | Phone |
| Access Security Concepts 10303 Northwest Fwy 400, Houston 77092 | (713) 956-6655 |
| Bottom Line Protection Systems 1729 Stebbins Dr 120, Houston 77043 | (713) 468-6318 |
| Burglar Bars By Fencemaster 11007 W Hardy Rd, Houston 77076 | (713) 692-2782 |
| Concord Communications Systems 3890 North Fwy C, Houston 77022 | (713) 695-5858 |
| Electronic Security Svc 9001 Airport Blvd 201, Houston 77061 | (713) 645-8225 |
| Grand Texas Security 7010 Heron Dr, Houston 77087 | (713) 242-0880 |
| Kastle Systems 3121 Richmond Ave, Houston 77098 | (713) 528-2700 |
| Initial Security 16350 Park Ten Pl 113, Houston 77084 | (713) 896-1977 |
| Security Systems Houston 2450 Louisiana St, Houston 77006 | (713) 793-6793 |
| Devcon Security 335 Pennbright Drive #140, Houston 77090 | (832) 369-2599 |