| National Institute for Mathematical Sciences | Seoul |
| National IT Industry Promotion Agency | Seoul |
| National Nanofab Center | Daejeon |
| NAVER Corporation | Seoul |
| Naver Z | Gyeonggi |
| NCSOFT Corporation | Seoul |
| NdotLight Co., Ltd | Gyeonggi |
| NDSoft Co., Ltd | Daejeon |
| Nearthlab | |
| neoALI, Inc. | |
| Neowiz | Seoul |
| Neowiz Partners | Seoul |
| Neptune Company | Gyeonggi |
| Nethru Co., Ltd | Seoul |
| NETMARBLE Company Corporation | Seoul |
| NetMiner | Gyeonggi |
| Netpathy | Seoul |
| Netpia, Inc. | Seoul |
| Netsket Co., Ltd | Gyeonggi |
| Nettention, Inc. | Seoul |
| NetViet | Seoul |
| Network Manias | Seoul |
| Neumous | |
| Neuracle Science | |
| Neuracle Science Co., Ltd | Seoul |
| NeuroEM Therapeutics, Inc. | |
| Neurophet, Inc. | Seoul |
| New Paradigm Investment | Seoul |
| New Power Plasma Co., Ltd | Gyeonggi |
| Newnop | |
| Newploy Co., Ltd | Seoul |
| NEXEL Co., Ltd | Seoul |
| Nexensor Co., Ltd | Daejeon |
| Nexgenwave Co., Ltd | |
| Nexmos | Gyeonggi |
| Nexon | Seoul |
| Nexon Games | Seoul |
| Next Test Solution | South Chungcheong |
| Nextbiomedical Co., Ltd | |
| NextIn Solutions | Gyeonggi |
| Nextinnovation Co., Ltd | Seoul |
| NEXTURE Corporation | Seoul |
| NEXTweb Co., Ltd | Seoul |
| NGeneBio | |
| NHN Cloud Corporation | Gyeonggi |
| NHN Edu Corporation | Gyeonggi |
| NIBEC | |
| NICE Payments | Seoul |
| NICEMACH Co., Ltd | |
| Nielsen KoreanClick Co., Ltd | Seoul |