| Gimcheon University | |
| Globalhost | Gyeonggi |
| Globalstar Asia Pacific | Seoul |
| GN Service | Daejeon |
| Gold Ark | Seoul |
| Golden Light Co., Ltd | Daejeon |
| Goldennet | Seoul |
| GOM & Company | Seoul |
| Goorm, Inc. | |
| GPCR Therapeutics Co., Ltd | Seoul |
| Gractor | Seoul |
| Gravity | Seoul |
| Green Labs | Seoul |
| GreencatSoft | Gyeonggi |
| Grovesoft Co., Ltd | Seoul |
| Growth Co., Ltd | Gyeonggi |
| Gryphon Dynamics | Daegu |
| Gukje Cyber University | |
| Gurlimsoft | Seoul |
| Gwangjiu Catholic University | |
| Gwangju Institute of Science & Technology | Gwangju |
| Gyeongbuk College of Health | |
| Gyeongbuk Technopark | North Gyeongsang |
| Gyeonggi Daejin Technopark | Gyeonggi |
| Gyeonggi Technopark | Gyeonggi |
| Gyeonggi University of Science and Technology | |
| Gyeongnam Technopark | South Gyeongsang |
| H2O Hospitality Ltd | Seoul |
| Hackle Co., Ltd | Seoul |
| Haenasoft | Gyeonggi |
| Haesung DS | Seoul |
| Hana Financial Group | Seoul |
| HanA IT, Inc. | Daegu |
| HANA Micron, Inc. | South Chungcheong |
| HANA Micron, Inc. | South Chungcheong |
| Hana Pharm Co., Ltd | Seoul |
| HanAll Biopharma | Seoul |
| HANBACK Electronics Ltd | Seoul |
| Hanbit Media, Inc. | Seoul |
| Hancom InSpace Co., Ltd | Daejeon |
| Hancom, Inc. | Seoul |
| HanditSoft | Seoul |
| HANDOK | |
| Handysoft | Gyeonggi |
| Hangang Systems, Inc. | Seoul |
| Hanho Electronics Co. | Incheon |
| Hanics | Incheon |
| Hankuk University of Foreign Studies | |
| Hanmac | Seoul |
| Hanmi Pharm Co., Ltd | Seoul |