| 1001 Click Co., Ltd | Bangkok |
| 10gb-host | Bangkok |
| 12Go | Bangkok |
| 191 เอสอีโอ | Bangkok |
| 1WebHostReview | Bangkok |
| 22kN Ltd | Bangkok |
| 24Webhost | Bangkok |
| 2BeShop.com | Bangkok |
| 2fellows Network and Design | Bangkok |
| 4 Colors Design Co., Ltd | |
| 4Colors Design | Bangkok |
| 4HostWeb | Bangkok |
| 4M Multimedia | Bangkok |
| 7 Peaks Software | Bangkok |
| 777 Studio | Chiang Mai |
| AB Website Design Bangkok | Bangkok |
| ABACUS digital Co., Ltd | |
| ACAYA | Bangkok |
| Acer Computer Co., Ltd | Bangkok |
| aCommerce | Bangkok |
| AD System Asia Co., Ltd | Bangkok |
| Advanced Info Service plc | Bangkok |
| Advanced Information Technology plc | Bangkok |
| Advanced Research Group Co., Ltd | Bangkok |
| AI and Robotics Ventures Co., Ltd | Bangkok |
| AI for Thai | Pathum Thani |
| Ake Design | Nonthaburi |
| AllCAD Technologies | Bangkok |
| Alt Telecom plc | Nonthaburi |
| Altin Design | |
| AME Computer | Bangkok |
| AmiVoice Thai Co., Ltd | Bangkok |
| ANET Internet | Bangkok |
| Ant Websystems Co., Ltd | Bangkok |
| AppliCAD Co., Ltd | Bangkok |
| Application Hosting Services Co., Ltd | Bangkok |
| AppMan Co., Ltd | Bangkok |
| Appsynth | Bangkok |
| Area Digital | Bangkok |
| Aristosoft | Bangkok |
| Ascend Group Co., Ltd | Bangkok |
| ASEAN University Network | |
| Asia Genial | Bangkok |
| Asia Media Studio | Bangkok |
| Asia-Pacific International University | |
| Asia-Pacific Telecommunity | Bangkok |
| AsiaHabit Digital Co., Ltd | |
| Asian Institute of Technology | Bangkok |
| Asian Institute of Technology - Computer Science and Information Management program | Pathum Thani |
| Asiasoft Corporation Public Co., Ltd | Bangkok |