| Name | Phone | Category |
| MacArthur Park | 650-321-9990 | Restaurants, Cafes & Catering |
| Made in Palo Alto | 650-276-9057 | Advertising & Media |
| Manatt, Phelps & Phillips, LLP | 650-812-1300 | Attorneys |
| Manpower, Inc. | 650-846-2200 | Staffing Services |
| Marielena Scanlon, M.A. - New York life | 408-452-6045 | Insurance Services |
| Robert Marinaro | | Business Referral Network Members |
| Marriott Residence Inn | 650-559-7890 | Hotels & Motels |
| MassMutual Financial Group | 650-575-0865 | Financial Services |
| MassMutual Silicon Valley | 408-487-1532 | Financial Services |
| Max's Opera Cafe | 650-323-6297 | Restaurants, Cafes & Catering |
| MayView Community Health Center | 650-327-8717 | Health Services |
| McFall Architecture | 650-327-3100 | Architects |
| Suzanne McKenna - J.Hilburn Men's Clothier | 650-814-5823 | Clothing |
| McNellis Partners, LLC | 650-853-3900 | Real Estate |
| McRoskey Mattress Company | 650-327-1966 | Beds & Mattresses |
| Melchor Corporation | 650-323-3529 | Financial Services |
| The Menu | 408-800-6368 | Restaurants, Cafes & Catering |
| Merry Maids | 650-961-8288 | Home & Office |
| David S. Meyers CFP | 800-993-2994 | Financial Services |
| Microsoft | 650-693-1397 | Leaders Circle |
| Microsoft Store | 650-798-2900 | Shopping & Retail |
| Midpeninsula Community Media Center | 650-494-8686 | Entertainment and Arts |
| Mike's Cafe Etc. | 650-473-MIKE | Restaurants, Cafes & Catering |
| Miki's Farm Fresh Market, INC. | 650-485-8600 | Grocers & Markets |
| Miller Law Group P.C. | 650-566-2290 | Attorneys |
| Miller Starr Regalia | 650-463-7800 | Attorneys |
| Jane Brindle Miller | 650-321-6011 | Attorneys |
| Minerva Consulting | 650-424-0202 | Business to Business Resources |
| 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 |
| 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 |
| Morrison & Foerster | 650-813-5746 | Attorneys |
| Dan Morse - Farmers Insurance | 415-509-1989 | Insurance Services |
| Morton & Associates Inc. | 650-323-6665 | Accounting |
| Mosaic Global Transportation | 650-864-9701 | Transportation Services |
