| Name | Phone | Category |
| M Squared Consulting | 408-467-3830 | Business to Business Resources |
| MacArthur Park | 650-321-9990 | Restaurants, Cafes & Catering |
| Madison & Fifth Ristorante Pizza Bar Cafe | 650-323-3900 | Restaurants, Cafes & Catering |
| Paul Malin | (650) 463-4568 | Financial Services |
| Manatt, Phelps & Phillips, LLP | 650-812-1300 | Attorneys |
| Mantra Restaurant and Lounge | 650-322-3500 | Restaurants, Cafes & Catering |
| Robert Marinaro, New York Life | 650-269-5936 | Business Referral Network Members |
| Barbara Mark Ph.D. | 415-431-9055 | Business to Business Resources |
| Marriott Residence Inn - Palo Alto/Los Altos | 650-559-7890 | Hotels & Motels |
| John C. Martin | (650) 329-9500 | Business Referral Network Members |
| Maximart Pharmacy | 650-327-3922 | Drug Stores & Pharmacies |
| Max's Opera Cafe | 650-323-6364 | Restaurants, Cafes & Catering |
| MayView Community Health Center | 650-327-8717 | Health Services |
| McDonald's of Palo Alto | 650-940-4200 | Restaurants, Cafes & Catering |
| McFall Architecture | 650-327-3100 | Architects |
| McNellis Partners, LLC | 650-853-3900 | Real Estate |
| McRoskey Mattress Company | 650-327-1966 | Beds & Mattresses |
| David Meir-Levi | 650-857-9072 | Insurance Services |
| Melchor Corporation | 650-323-3529 | Financial Services |
| Melt Ultra Lounge | 650-325-6358 | Restaurants, Cafes & Catering |
| Menlo College | 650-543-3744 | Education |
| Menlo Park Dental Excellence/Chaulong Dental Corporation | 650 838-0260 | Dentists |
| The Mercury News | 408-2713634 | Advertising & Media |
| Mermaid Inn | 800-237-4622 | Hotels & Motels |
| Merry Maids | 650-961-8288 | Home & Office |
| Mid Peninsula Orthodontics | 650-328-1600 | Health Services |
| Midpeninsula Community Media Center | 650-494-8686 | Audio Visual & Installations |
| Mike's Cafe Etc. | 650-473-MIKE | Restaurants, Cafes & Catering |
| Miller Law Group P.C. | 650-566-2290 | Attorneys |
| Miller Starr Regalia | 650-463-7800 | Attorneys |
| Jane Brindle Miller | 650 321--6011 | Business Referral Network Members |
| Mills The Florist | 650-326-3443 | Florists |
| Ming's Chinese Cuisine and Bar | 650-856-7700 | Restaurants, Cafes & Catering |
| Mitchell Herzog & Klingsporn LLP | (650) 327-7476 | Business Referral Network Members |
| MLA Productions | 831-438-4751 | Event Planning & Management |
| Mock Photography | 650-321-5574 | Photography |
| Mollie Stone's Market | 650-323-8361 | Grocers & Markets |
| Momentum for Mental Health | 650-617-1759 | Health Services |
| Moon & Mandella Accountancy Corp. | 650-857-1284 | Accounting & Bookkeeping Services |
| Morgan Stanley | 650-324-1920 | Financial Services |
| Morrison & Foerster | 650-813-5746 | Attorneys |
| Law Offices of John Morrow Hackmann | 650-323-5646 | Attorneys |
| Morton & Associates Inc. | 650-323-6665 | Accounting & Bookkeeping Services |
| Mountain Camp | 415-351-2267 | Recreation |
| Mulcahy Family Dentistry | 650-328-1223 | Dentists |
| Murray Engineers, Inc. | 650-326-0440 | Engineering |
| Muscadine Health Juice | 650-323-6860 | Health Services |
| MWagner Consulting | 650-248-1869 | Business to Business Resources |
| My Health Inc. | 650-278-0804 | Medical Systems |
