| Sungho Electronics | Seoul |
| SungHwa Electronic Co., Ltd | Seoul |
| Sungjin Techwin Co., Ltd | Seoul |
| Sungkonghoe University | |
| Sungkyul University | |
| Sungkyunkwan University | Seoul |
| Sungkyunkwan University - School of Information and Communication Engineering | Seoul |
| Sungsan Hyo University | |
| Sungshin Women's University | Seoul |
| Sunic System Co., Ltd | Gyeonggi |
| Sunlin University | |
| Sunny Electronics Corporation | Seoul |
| SUNY Korea | |
| Super Start | Seoul |
| Supertone, Inc. | |
| Suprema, Inc. | Gyeonggi |
| SureM Co., Ltd | Seoul |
| Suresoft | Seoul |
| Surginex | |
| SurplusGLOBAL, Inc. | Gyeonggi |
| Suseong University | |
| Suwon Science College | |
| Suwon Women's University | |
| SV Investment Co., Ltd | Seoul |
| SWM Co., Ltd | Gyeonggi |
| Synapsoft Corporation | Seoul |
| Synus Tech | Gyeonggi |
| Sysmate | Daejeon |
| SysOne | Seoul |
| System Integration Internet Data Center | Seoul |
| System Manufactured Incorporated Co., Ltd | North Chungcheong |
| SystemBase Co., Ltd | Seoul |
| SystemEver | Seoul |
| SZU Korea Co., Ltd | Seoul |
| T-on Networks Co., Ltd | Seoul |
| T3Q | Seoul |
| Taegu Science University | |
| Taejin Infotech Co., Ltd | Seoul |
| Taewool Korea | Seoul |
| Tangunsoft | Seoul |
| Tap Angels Partners | Seoul |
| TBT Corporation | Seoul |
| Tech Incubator Program for Startups | Seoul |
| Tech University of Korea | |
| Tech9 | Seoul |
| TechMAC Co., Ltd | |
| Technicom Co., Ltd | Gyeonggi |
| Technoa | Seoul |
| Technology Leaders and Innovators | Gyeonggi |
| TechWing | Gyeonggi |