| GreenTomatoMedia | |
| Grey Alchemy Ltd | |
| Guide Vision Ltd | Phuket |
| HandiGo Co., Ltd | Bangkok |
| Hatyai Technical College | |
| Hatyai University | |
| Health Systems Research Institute | |
| Hellomyweb.com | Bangkok |
| Heroleads | Bangkok |
| Highly Persuasive | |
| HongHost Co., Ltd | Bangkok |
| Host Paragon | Bangkok |
| Hostatom | Bangkok |
| HostDomain.in.th | Bangkok |
| Hosting Bangkok | Bangkok |
| Hosting Thailand | Bangkok |
| Hosting-Group Co., Ltd | Chonburi |
| HostPacific.com | Bangkok |
| HPG Technology Co., Ltd | Bangkok |
| HSBC Thailand | |
| Huachiew Chalermprakiet University | |
| Humanica Public Co., Ltd | Bangkok |
| I&I Group Public Co., Ltd | Bangkok |
| i-App Creation Co., Ltd | Bangkok |
| i-bitz | |
| I-Secure | Bangkok |
| iApp Technology | Bangkok |
| IBC Advance Technology Co., Ltd | Bangkok |
| IC WEB Co., Ltd | Bangkok |
| IC-MyHost | Bangkok |
| iCONEXT Co., Ltd | Bangkok |
| Idalot Web Services | Bangkok |
| Identity RFID | Bangkok |
| iGetWeb | Bangkok |
| Ikebana Engineering Ltd | Bangkok |
| Imagineac | Bangkok |
| Infinity IT Success Ltd | Bangkok |
| InfoQuest Ltd | Bangkok |
| Information and Communication Networks | Bangkok |
| Infowave (Thailand) Co., Ltd | Bangkok |
| Infraset Public Co., Ltd | Bangkok |
| Ini3 Digital plc | Bangkok |
| Innova Software Co., Ltd | Bangkok |
| Innova Systems Co., Ltd | Bangkok |
| InsightEra Co., Ltd | Bangkok |
| Inspire Asia Co., Ltd | Bangkok |
| Inspire Ventures | Bangkok |
| Inter.co.th | Bangkok |
| Interlink Communication Public Co., Ltd | Bangkok |
| International Medical Software Co., Ltd | Bangkok |