| Nomboo | |
| Nomic.ai | |
| Nominal | |
| Nominal | |
| Nominal, Inc. | |
| Nominus.com, LLC | |
| Nomis Solutions | |
| Nomis Solutions, Inc. | California |
| Nomocan Pharmaceuticals | |
| Nomology | |
| Nomtek | District of Columbia |
| Nona Biosciences | Massachusetts |
| Nonagen Bioscience Corporation | California |
| Nonagen Therapeutics Corporation | |
| Noname Security | California |
| Nonbox | |
| NonExomics, Inc. | |
| Nonin Medical, Inc. | Minnesota |
| Noninvasix, Inc. | Texas |
| Nonnatech | New York |
| NonprofitOffice | Minnesota |
| NonprofitsHQ | |
| Noodle | |
| Noodle Cat Games | |
| Noodlecake Studios, Inc. | |
| Noodlesoft, LLC | New York |
| Nooks | California |
| Noom, Inc. | |
| Noon | Wyoming |
| Noonum | Washington |
| NoorSoftTech | |
| Noorusoft | |
| Noosphere Ventures | |
| Nopio | |
| nOps | |
| NopSec | |
| Nor-Tech Computer Solutions | Minnesota |
| Nora Brown Design | Massachusetts |
| Nora Kramer Designs | |
| Norac Pharma | |
| Noramco | Delaware |
| Norasack Design | |
| Noraxon USA, Inc. | Arizona |
| Norcal Networks, Inc. | California |
| Norcal Web Designs | |
| Norco College | California |
| Norcom | Washington |
| Norcon Technologies Holding, Inc. | Arizona |
| Norcron | Georgia |
| NoRD Bio | |