| Nakhon Ratchasima Rajabhat University | |
| Nakhon Si Thammarat Rajabhat University | |
| Nakhonratchasima College | |
| Naresuan University | |
| Nation University | |
| National Astronomical Research Institute of Thailand | |
| National Research Council of Thailand | |
| National Science and Technology Development Agency | Pathum Thani |
| National Telecom Public Co., Ltd | Bangkok |
| Nattyware | Bangkok |
| Navamindradhiraj University | |
| Naxza | Bangkok |
| Neat Interactive | |
| Nectec | Bangkok |
| Nemera Technologies Co., Ltd | |
| Neon Infotech SEA Co., Ltd | Bangkok |
| Net Bright Co., Ltd | Bangkok |
| Net Image Co., Ltd | Bangkok |
| Netbuild Co., Ltd | Bangkok |
| Netcity Co., Ltd | Bangkok |
| NetdesignHost | Bangkok |
| NetOne | Bangkok |
| NetPlus Software | Bangkok |
| Netregis | Bangkok |
| NETsolutions Asia | Bangkok |
| Netthailand | Bangkok |
| Netway Communication Co., Ltd | Bangkok |
| New System Service Co., Ltd | Bangkok |
| Newebtime | |
| ng Thai Wire & Cable Public Co., Ltd | Bangkok |
| Nineweb | Bangkok |
| Nipa Technologies Co., Ltd | Bangkok |
| Nirvana Co., Ltd | Bangkok |
| Noria | Chiang Mai |
| North Bangkok University | |
| NTK Software Co., Ltd | Bangkok |
| NTN Solution Ltd | Bangkok |
| Nysiis Solutions Co., Ltd | Bangkok |
| Office of the National Broadcasting and Telecommunications Commission | Bangkok |
| OGA International | Bangkok |
| Omise | Bangkok |
| One2Crowd Co., Ltd | Bangkok |
| OneHotel | Bangkok |
| OneHotel Co., Ltd | Bangkok |
| OnlineDevHosting.com | Bangkok |
| OOZOU | |
| Open Source Education and Development Association | Bangkok |
| Open Source Technology Co., Ltd | |
| Optimus (Thailand) Co., Ltd | Bangkok |
| Optimus Thailand Co., Ltd | Bangkok |