| Business | Phone |
| Armorgard 10 Nihan Dr, St Catharines L2N 1L1 | (905) 935-0341 |
| Microtec.Securi-T Niagara 11 Bond St, St Catharines L2R 4Z4 | (905) 685-6000 |
| Pasword Protection Svc 91 Geneva St, St Catharines L2R 4M9 | (905) 641-2742 |
| Protel Alarm & Signal 94 Dunkirk Rd, St Catharines L2P 3H4 | (905) 682-7250 |
| Security Link From Ameritech 36 Wright St, St Catharines L2P 3J4 | (905) 988-5666 |
| Systems Service 180 Niagara St, St Catharines L2R 4L9 | (905) 685-0249 |