| Internet Thailand Public Co., Ltd | Bangkok |
| Intersite | Bangkok |
| Intropica Co., Ltd | Bangkok |
| Ireallyhost | Bangkok |
| IT4All | Bangkok |
| ITOPPLUS Co., Ltd | Bangkok |
| iWeb Application Co., Ltd | Bangkok |
| Jan IT | |
| Jasmine Telecom Systems PCL | Nonthaburi |
| Jenosize Co., Ltd | Nonthaburi |
| JIB Computer Group | Bangkok |
| Jimmy Software Co., Ltd | Bangkok |
| JP Virtual Solutions Co., Ltd | Bangkok |
| Just Great Software Co., Ltd | Phuket |
| JustUsers | Bangkok |
| Kalasin University | |
| Kamphaeng Phet Rajabhat University | |
| Kasem Bundit University | |
| Kasetsart University | |
| Kasetsart University - Computer Science | Bangkok |
| Kasetsart University - Department of Computer Engineering | Bangkok |
| KBTG | Nonthaburi |
| Key22 | Bangkok |
| Khon Kaen University | |
| Kiatnakin Phatra Financial Group | |
| King Mongkut's Institute of Technology Ladkrabang | |
| King Mongkut's University of Technology North Bangkok | |
| King Mongkut's University of Technology Thonburi | Bangkok |
| Kiragames Co., Ltd | Chiang Mai |
| Kokae Hosting | Bangkok |
| Kos Design Bangkok | Bangkok |
| Krirk University | |
| Krungsri Finnovate Co., Ltd | Bangkok |
| KZYNET Co., Ltd | Bangkok |
| Lakeshore-Capital | Bangkok |
| Lampang Inter-Tech College | |
| Lampang Rajabhat University | |
| Lampang Vocational College | |
| Launchpad Co., Ltd | Bangkok |
| Leap Solutions Asia | Bangkok |
| Leotechnology and Marketing Co., Ltd | Bangkok |
| Living Mobile Co., Ltd | Bangkok |
| Loei Rajabhat University | |
| LogicSpace Co., Ltd | Bangkok |
| M Plus Technology Co., Ltd | Bangkok |
| M@gictouch | Phuket |
| Macrocare Co., Ltd | Bangkok |
| Mae Fah Luang University | |
| Magic IT | Bangkok |
| Magic Software (Thailand) Co., Ltd | Bangkok |