| Qraft Technologies, Inc. | |
| QRT, Inc. | Gyeonggi |
| QUANDA | Seoul |
| QuantaMatrix, Inc. | Seoul |
| Quantec Investment Management Co., Ltd | |
| Quratis | Seoul |
| Qurient Co., Ltd | |
| R.F. Hitec, Inc. | Seoul |
| Rabbit Ventures | |
| Rakuten Drive | Seoul |
| Raon A&C, Inc. | Daejeon |
| Raontec | Gyeonggi |
| Raontech | Gyeonggi |
| Rapid Information & Communication | Gyeonggi |
| Rapport Labs Co., Ltd | Seoul |
| ReadSpeaker | Seoul |
| Realsoft | Seoul |
| Rebellions, Inc. | |
| RecensMedical | |
| Regent Partners | |
| RepiaCom, Inc. | Seoul |
| Rev It Co., Ltd | Seoul |
| Reyon Pharmaceutical Co., Ltd | |
| Rezi | Seoul |
| RF Data Co., Ltd | Seoul |
| RF Power Tech | Gyeonggi |
| RFcore | Gyeonggi |
| Ringnet Co., Ltd | Seoul |
| RNAGene | Seoul |
| Robobuilder Co., Ltd | Seoul |
| Roborus | Seoul |
| Robostar | Seoul |
| Robostar Co., Ltd | |
| Robot Research Initiative | Gwangju |
| Robots and Design | Gyeonggi |
| Rocketworks Co., Ltd | Gyeonggi |
| ROKIT Healthcare, Inc. | Seoul |
| Rootnet Corporation | Seoul |
| Rophibio, Inc. | |
| RP Networks Co., Ltd | Seoul |
| RS Automation Co., Ltd | Gyeonggi |
| RS Automation Co., Ltd | |
| RSUPPORT | Seoul |
| RUDA Creative Co., Ltd | Seoul |
| Russell Co., Ltd | North Chungcheong |
| Rznomics | |
| S-Energy Co., Ltd | Gyeonggi |
| S2W, Inc. | Gyeonggi |
| Saekyung University | |
| SaferZone, Inc. | Seoul |