| Intelli Solutions S.A. | |
| IntelSoft | Attica |
| Interactive Pixels | Attica |
| Interconnect | Attica |
| Interga | Attica |
| International Hellenic University | |
| Internet at Major | Attica |
| Interneti | |
| Intersmart | |
| interTEN | |
| Interworks Single Member S.A. | |
| INTRACOM Defense Electronics | Attica |
| Intracom Holdings S.A. | Attica |
| Intracom Telecom | Attica |
| Intros | Attica |
| InTTrust S.A. | |
| Iopen | Thessaly |
| IP.gr | Attica |
| iPhoneRepair.org | Attica |
| IpHost | Attica |
| IPS Ltd | |
| iQbility | Attica |
| iRepair | Attica |
| iSmart | Attica |
| Isotopon | Attica |
| Isotopon.gr | Attica |
| iSquare | Attica |
| ISTODATA Digital Agency | Attica |
| Istopolis | Attica |
| iSystem | Attica |
| IT Security Pro | |
| ITBIZ Digital Agency | |
| Iteam S.A. | Attica |
| iTechScope | |
| ITIS | |
| ITML | |
| ITS Services | |
| iWorx | Attica |
| Javaspecialists.eu | Crete |
| JK Software | |
| JMC AE | Central Greece |
| JoomlaWorks Ltd | Attica |
| JWS | Attica |
| K&G Digital Service | Attica |
| Kaktosweb | Attica |
| Kallipos | |
| Kisware Computer | Attica |
| Kleesto | Attica |
| Knowledge A.E. | West Greece |
| Kotsovolos | Attica |