| Business | Phone |
| Guardian Alarms Po Box 699, Lindsay K9V 4W9 | (705) 878-5000 |
| Vantage Security Network Ltd 72 Eglington St, Lindsay K9V 3Z5 | (705) 328-1858 |
| Brock Security Systems 25 Kent St W, Lindsay K9V 2X9 | (705) 328-1866 |
| Dyson Alarm Tech Systems 183 Highway 36, Lindsay K9V 4R4 | (705) 324-9702 |