| Business | Phone |
| Academy Of Private Inv & Scrty 1333 Rymal Rd E, Hamilton L8W 3N1 | (905) 388-1633 |
| Apollo Investigation Svc 21 Hunter St E, Hamilton L8N 1M2 | (905) 523-5623 |
| Aston Associates Investigation 124 James St S, Hamilton L8P 2Z4 | (905) 529-5498 |
| Keyfacts Canada Inc 1685 Main St W, Hamilton L8S 1G5 | (905) 528-7983 |
| King-Reed & Assoc Ltd 288 Grays Rd #5, Hamilton L8E 1V5 | (905) 524-2344 |
| Northwest Protection Svc Ltd 1100 Main St W, Hamilton L8S 1B3 | (905) 524-1809 |
| Oliver Yaskiw & Assoc Inc 10 George St, Hamilton L8P 1C8 | (905) 526-7686 |
| Quinn Investigations Inc 10 George St, Hamilton L8P 1C8 | (905) 528-5555 |
| Signum Corporate Svc Inc 45 Goderich Rd #202, Hamilton L8E 4W8 | (905) 573-6808 |
| Standen & Assoc Professional 86 Ossington Dr, Hamilton L8W 3S4 | (905) 318-7330 |
| Corporate Investigation Svc 101 Hunter St E, Hamilton L8N 1M5 | (905) 527-5856 |
| Urquhart Investigation 175 Hunter St E #111, Hamilton L8N 4E7 | (905) 524-2777 |
| Whitehall Bureau Of Canada Ltd 35 Goderich Rd #5, Hamilton L8E 4P2 | (905) 777-8333 |
| Collins Investigation Svc 105 Main St E #503, Hamilton L8N 1G6 | (905) 526-9469 |