| Galway-Mayo Institute of Technology | Galway City Council |
| Gambrinous | Dublin City Council |
| Game Developers Ireland | Dublin City Council |
| Game Localization Network Ltd | Dublin City Council |
| Game On Media Ltd | |
| GameMaker | |
| Gazelle Wind Power Ltd | |
| GBA Solutions | |
| GECKO Governance | Louth County Council |
| Gemmo AI | |
| Gene Planet Ltd | |
| Genuity Science (Ireland) Ltd | Dublin City Council |
| Geowox | |
| getButterfly | |
| Getting Irish Business Online | Dublin City Council |
| Getvisiblilty | |
| GH Research Ireland Ltd | |
| Giant Elk | |
| Giant Studios | |
| GKinetic Energy Ltd | |
| Glandore | |
| Glasban Ltd | |
| Glitterbug | |
| Global Vision | Cork City Council |
| Globe Technical Services Ltd | Cork City Council |
| Glofox | Dún Laoghaire-Rathdown County Council |
| Go Online Web Design | |
| Go2mobile Solutions Ltd | Limerick City and County Council |
| Go2web Ltd | |
| GoBeyond Ltd | Kildare County Council |
| GoldStar Telecommunications (Ireland) Ltd | Cork City Council |
| Goshido | Limerick City and County Council |
| Granite Consulting Ltd | Cork City Council |
| Graphedia Ltd | Wexford County Council |
| Grattan Computers Ltd | |
| Greenfi Systems Ltd | |
| Greenfinch | |
| Greentech Plastics Ltd | |
| Grey Matter Ltd | |
| GridBeyond | |
| Griffith College | |
| Griffith College - Faculty of Computing | Dublin City Council |
| GRIP Software Solutions | |
| Groupmail Ltd | Sligo County Council |
| gsmExchange.com Ltd | Dún Laoghaire-Rathdown County Council |
| GTS | Dublin City Council |
| GUERRILLA Digital Ltd | |
| GuestDiary.com | |
| Guinness Enterprise Centre | |
| GymBuddy | |