| Phranakornsoft Co., Ltd | Bangkok |
| Phuket Solution Co., Ltd | Phuket |
| Pibulsongkram Rajabhat University | |
| Pichaya Solutions Co., Ltd | Bangkok |
| Picohosting | Bangkok |
| Piesoft Co., Ltd | Bangkok |
| Pixel Planet Design Co., Ltd | Bangkok |
| Placeworks Co., Ltd | |
| Plusma Infotech Co., Ltd | Bangkok |
| Poise Technology Co., Ltd | Bangkok |
| Police Nursing College | |
| Porar | Bangkok |
| Postech Group International Co., Ltd | Bangkok |
| POSware | Bangkok |
| Powell Computer Manufacturing Co., Ltd | Bangkok |
| PowerGREP | Phuket |
| Praboromarajchanok Institute | |
| Predictive Co., Ltd | Bangkok |
| Premier Technology plc | Bangkok |
| Primal | Bangkok |
| Primo World Co., Ltd | Bangkok |
| Princess of Naradhiwas University | |
| Proactive Marketing Solutions Co., Ltd | Chonburi |
| PROEN Corporation Public Co., Ltd | Bangkok |
| Prompt Design | Bangkok |
| Prosoft Creative | Bangkok |
| Proteus Group | Bangkok |
| Proteus Group | Bangkok |
| Provincial Electricity Authority | Bangkok |
| Punspace | Chiang Mai |
| Puumsoft Co., Ltd | Bangkok |
| PyCon Thailand | Bangkok |
| QPlusHost.com | Bangkok |
| Rachadapon Co., Ltd | Bangkok |
| RackServerThai | Bangkok |
| Ragnar Corporation | Bangkok |
| Rajamangala University of Technology Isan | |
| Rajamangala University of Technology Isan Khon Kaen Campus | |
| Rajamangala University of Technology Isan Sakonnakhon Campus | |
| Rajapruk University | |
| Rambhai Barni Rajabhat University | |
| Ramkhamhaeng University | |
| Rattana Bundit University | |
| Reach Global | Bangkok |
| RegexBuddy | Phuket |
| RingZero Networks (Thailand) Co., Ltd | Bangkok |
| RISE Accel Co., Ltd | Bangkok |
| Robowealth Mutual Fund Brokerage Securities Co., Ltd | Bangkok |
| Roi Et Rajabhat University | |
| Roots Company | Bangkok |