| Business | Phone |
| Active Protection Svc Inc 2063 Long Ridge Rd, Stamford 6903 | (203) 461-9797 |
| Alarm Doctor 59 Rutz St, Stamford 6906 | (203) 348-2847 |
| Westec Security Systems 101 Broad St, Stamford 6901 | (203) 326-7900 |
| V-Tech Systems 257 Long Ridge Rd, Stamford 6902 | (203) 323-2711 |
| Sonitrol 1 Landmark Sq, Stamford 6901 | (203) 327-9000 |
| Security Solutions Inc Stamford 6902 | (203) 846-8466 |
| Security Specialists 3 Depinedo Ave, Stamford 6902 | (203) 531-4000 |
| R Stone Assoc Security Cnsltnt 81 Ridge Brook Dr, Stamford 6903 | (203) 322-7020 |
| Pegasus Protective Systems 100 Virgil St, Stamford 6902 | (203) 353-8492 |
| Home Security Systems Inc 64 Round Hill Dr, Stamford 6903 | (203) 853-6066 |
| Homeguard Security Systems Stamford 6902 | (203) 325-4213 |
| Kemp Security 37 Beal St, Stamford 6902 | (203) 323-2840 |