| Business | Phone |
| Apropos 327 1st St W # 2, Sonoma 95476 | (707) 939-0487 |
| Campbell Consulting Sonoma 95476 | (707) 996-6000 |
| Electronic Tools Co 928 1st St W, Sonoma 95476 | (707) 996-3320 |
| Gautier & Assoc 19165 Robinson Rd, Sonoma 95476 | (707) 935-8538 |
| Vintage Consulting Group 780 W Napa St, Sonoma 95476 | (707) 939-8387 |
| Weistek Consulting 225 1st St W, Sonoma 95476 | (707) 939-8548 |