| Douleutaras | |
| Draxis Environmental S.A. | |
| DS Creative | Attica |
| Dtek NetWorking | |
| Dualshop | Attica |
| Dynamic Promotion E-shop Solutions | Attica |
| Dynamic Site | Attica |
| E Commerce Ltd | Attica |
| E-amo | Attica |
| E-Gadgets | Attica |
| E-genius | Attica |
| E-Miles Creations | Attica |
| E-shop.gr | Attica |
| e-Wireless | |
| E.T.E.Θ. Μονοπρόσωπη A.E. | |
| eAnagnosis | Attica |
| Easy.gr | Attica |
| EasyComTech | Attica |
| ECOS Consulting | |
| Ecsypno | Attica |
| EDIS.I.NET | Attica |
| Effectlab.gr | Attica |
| efood | |
| egg - enter.grow.go | |
| Ekter S.A. | |
| Elco Vayonis S.A. | |
| Elecnet S.A. | Attica |
| Elemko | |
| Ellasan | Attica |
| Elorus | Attica |
| Elpen S.A. | |
| Emil Kipriotis S.A. | Attica |
| Emimikos | Attica |
| EMTech Global S.A. | |
| Emvis S.A. | |
| Energineering Solutions | |
| Enterprise Agile Conference | |
| Enterprise Greece | |
| Enwrite | |
| Epilogi.net | West Greece |
| Epinoisis Software | Attica |
| Eproductions | Attica |
| Epsilon Group | Attica |
| Epsilon Net S.A. | |
| Ergon Iris | Attica |
| ES Systems | Attica |
| eTelestia | Central Macedonia |
| Euditi | |
| Eunet.gr | Attica |
| Eurobank Equities Α.Ε.Π.Ε.Υ. | Attica |