| YDOP Internet Marketing | Pennsylvania |
| YDPages, Inc. | Washington |
| Ydrive, Inc. | Washington |
| YDS Pharmatech | New York |
| Yeah Design Works | |
| YEAH! Local | |
| Yecuris Corporation | Oregon |
| Yelcot Communications | California |
| Yellahouse | Maine |
| Yelling Mule, LLC | Massachusetts |
| Yello | Illinois |
| Yellow | |
| Yellow | |
| Yellow Card, Inc. | Georgia |
| Yellow House Design | North Carolina |
| Yellow Messenger | Delaware |
| Yellow Mug Software | California |
| Yellow Rose Digital | |
| Yellow Studio | |
| Yellow Systems | California |
| yellow.ai | California |
| Yellowbarn Web Design & SEO | Florida |
| YellowBird | |
| Yellowbrick Data, Inc. | California |
| Yellowbrick Data, Inc. | California |
| Yellowdig | Pennsylvania |
| YellowFin Digital | |
| Yellowfish | Virginia |
| YellowFolder | Michigan |
| YellowHammer | New York |
| Yellowkeet, Inc. | Tennessee |
| Yellowknife Wireless | Oregon |
| YellowPepper | Florida |
| Yellowpipe | Washington |
| YellowSEO | New York |
| Yellowspeed, LLC | New York |
| Yellowstone Capital Partners, LLC | Texas |
| Yellowstone Computer Service | Wyoming |
| Yellowstone Technologies, Inc. | |
| Yellowzone, Inc. | California |
| Yelosquare, Inc. | |
| Yelp, Inc. | California |
| Yenco.com | Massachusetts |
| Yendo | Texas |
| Yennik, Inc. | |
| YenZym Antibodies, LLC | California |
| Yep.so | |
| Yes Computers | Massachusetts |
| Yes Crew | |
| Yes Energy | Colorado |