| Name | Phone | Category |
| Idean Enterprises, Inc. | 650.241.4870 | Design |
| IKEA US west, Inc. - 347 | 650-323-4532 | Furniture & Accessories |
| Il Fornaio Cucina Italiana | 650-853-3888 | Restaurants, Cafes & Catering |
| Indochine | 650-853-1238 | Restaurants, Cafes & Catering |
| Inhabiture Design+Build+Home | 650-324-0688 | Shopping & Retail |
| Inksmith Printing | 650-318-8033 | Business to Business Resources |
| InnVision | 650-853-8672 | Community & Human Services |
| Insurance by Allied Brokers | 650-328-1000 | Insurance Services |
| The Integrated Lifestyle | 408-393-4779 | Home & Office |
| International School of the Peninsula | 650-251-8500 | Education |
| Isaac Borowiec- Innovatio Health | 650-429-8185 | Health Services |
