| Norsk Romsenter | Oslo |
| Norsk Venturekapitalforening | |
| NorTec AS | Trøndelag |
| Nortech | |
| NorthSea IT AS | Hordaland |
| Norus Regnskapsbyrå AS | |
| Norway Health Tech | |
| Norway Makers | |
| Norwegian .NET User Group | Oslo |
| Norwegian AI Directory | |
| Norwegian Block Exchange AS | |
| Norwegian BSD User Group | Oslo |
| Norwegian Cognitive Center | |
| Norwegian University of Science and Technology | |
| Norwegian University of Science and Technology - Department of Mathematical Sciences | Oppland |
| Norwegian University of Science and Technology - Department of Computer and Information Science | Trøndelag |
| Norwegian UNIX User Group | Oslo |
| Novelda AS | Oslo |
| NSN | Oslo |
| Numascale AS | |
| Numus | |
| Nyby | |
| Nykode Therapeutics ASA | |
| ObjectPlanet, Inc. | Oslo |
| Observe Medical ASA | |
| Ocean Oasis | |
| Ocean Power Parks | |
| Odal Sparebank | |
| Oddstøl Elektronikk AS | Møre og Romsdal |
| ODI Medical AS | |
| OfficeConsult | Trøndelag |
| Oivi AS | |
| Oliasoft AS | |
| Omega AS | Rogaland |
| Omego Fleet | |
| Oncoinvent AS | |
| One Call AS | Oslo |
| OnNet AS | Oslo |
| Onsagers AS | |
| OnSiteViewer | |
| Opera | Oslo |
| OptoScale | |
| Oracle Norge AS | Akershus |
| Orbit Systems AS | |
| Orgdot AS | Oslo |
| Oriented Soft | |
| Oslo Business Region | |
| Oslo Edtech Cluster | Oslo |
| Oslo Innovation Week | |
| Oslo International Hub | |