| Provincial Electricity Authority | Bangkok |
| Punspace | Chiang Mai |
| Puumsoft Co., Ltd | Bangkok |
| PxSter | |
| PyCon Thailand | Bangkok |
| QPlusHost.com | Bangkok |
| Rachadapon Co., Ltd | Bangkok |
| RackServerThai | Bangkok |
| Raffles International College | |
| Ragnar Corporation | Bangkok |
| Rajabhat Maha Sarakham University | |
| Rajamangala University of Technology Isan | |
| Rajamangala University of Technology Isan Khon Kaen Campus | |
| Rajamangala University of Technology Isan Sakonnakhon Campus | |
| Rajamangala University of Technology Krungthep | |
| Rajamangala University of Technology Lanna | |
| Rajamangala University of Technology Phra Nakhon | |
| Rajamangala University of Technology Rattanakosin | |
| Rajamangala University of Technology Srivijaya | |
| Rajamangala University of Technology Suvarnabhumi | |
| Rajamangala University of Technology Tawan-ok | |
| Rajamangala University of Technology Thanyaburi | |
| Rajapark Institute | |
| Rajapruk University | |
| Rambhai Barni Rajabhat University | |
| Ramkhamhaeng University | |
| Rangsit University | |
| Rattana Bundit University | |
| Reach Global | Bangkok |
| RegexBuddy | Phuket |
| Rethink Lab | |
| 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 |
| Royal Thai Army Nursing College | |
| Sabai Customer Co., Ltd | Bangkok |
| Saengtham College | |
| Saint John's University | |
| Saint Louis College | |
| Sakon Nakhon Rajabhat University | |
| Salary Hero | |
| Samart Corporation Public Co. | Bangkok |
| Samart Infonet Co., Ltd | Bangkok |
| Samart Telcoms PCL | Bangkok |
| Santapol College Udonthani | |
| Santhapol Technology College | |
| Sasin School of Management | |
| Sattelthailand | Bangkok |