| Business | Phone |
| Blaskower Associates 936 7th St # 171b, Novato 94945 | (415) 472-3835 |
| Walsh & Assoc Investigations Po Box 5733, Novato 94948 | (415) 899-9660 |
| Apollo Services 448 Ignacio Blvd, Novato 94949 | (415) 883-0900 |
| Del Marva Investigative Group 277 San Marin Dr, Novato 94945 | (415) 892-1027 |
| Food & Beverage Investigation Novato 94945 | (415) 892-1027 |
| Richard A Keaton Investigation 5 Thunderbird Dr, Novato 94949 | (415) 898-3999 |
| Thompson Investigation Unltd Novato 94949 | (415) 382-8496 |
| Wax Investigations Po Box 881, Novato 94948 | (415) 897-5457 |