| Friends Consulting | |
| Friktoria.com | Thessaly |
| Front Series | |
| Future Media | Attica |
| Future Technology Systems | Attica |
| G&G Web Design | Attica |
| G.N.T. Information Systems S.A. | |
| Galaxynet S.A. | Attica |
| Gameover.gr | Attica |
| GENESIS Pharma S.A. | |
| Genotypos Science Labs | |
| Genotypos Science Labs | |
| Geodata.gov.gr | Attica |
| GeoLogismiki | Attica |
| Geosystems Hellas S.A. | |
| GIM Agency | |
| Global Web Hosting | Attica |
| Globitel S.A. | |
| GNC Web | |
| GNG Network | Attica |
| Go Creations | |
| Grafiman | |
| Great Way Καλαμάτα | Attica |
| Greek Fintech Cluster | |
| Greek Internet Marketing | Attica |
| Greek Universities Network | |
| Greek Venture Capital Association | |
| GreekChat | Attica |
| Grigoria | Attica |
| GRIX | Attica |
| Grixel | Attica |
| GRNET | |
| Grog Mobile Greece | Attica |
| GSP | Attica |
| Guru-host GR | Attica |
| Hackerspace.gr | Attica |
| Harbor Lab S.A. | Attica |
| Harokopio University of Athens | |
| HEALIS - Health Information Systems/Services | Attica |
| HEL.L.U.G. | Attica |
| Hellas Direct | |
| Hellas Sat | |
| Hellasgrid | Attica |
| Hellassites | Attica |
| Hellenic American College | |
| Hellenic Artificial Intelligence Society | Attica |
| Hellenic Capital Market Commission | |
| Hellenic Impact Investing Network | |
| Hellenic Open University | |
| Hellenic Pasteur Insititute | |