| EcoTech Sp. z o.o. Sp. k. | |
| Ecreo | Greater Poland |
| ECRU Software | Lesser Poland |
| Edamame Agency | |
| EDO Dariusz Szwedo | Opole |
| eDoktor24.pl | |
| edrone | |
| EdTechHub Ventures | |
| Educatifu Ltd | |
| Edward | Lesser Poland |
| EEC Ventures | |
| EEC Ventures | |
| EENGINE Software House | |
| Effect-Driven Design Sp. z o.o. | |
| Effectivity Software House | |
| EfficientWeb | |
| Efisco Sp. z o.o. | |
| eForensics Magazine | Masovian |
| eGabinet | |
| eHost.pl Sp. z o.o. | Lublin |
| Ein-des-Ein design & development | |
| EJR Sp. z o.o. | Silesian |
| Eko-Sort | Silesian |
| Ekobilet S.A. | |
| El Pixel Group Sp. z o.o. | |
| El-net | West Pomeranian |
| EL-TEC Sp. z o.o. | Łódź |
| eLang | |
| Elektromont S.A. | |
| Elektronika Sp. z o.o. | Masovian |
| ElektronikaB2B | Masovian |
| Elektropek | Podlaskie |
| Elektrozłom Sp. z o.o. | Silesian |
| Element Sp. z o.o. S.K.A. | |
| Elevation Group | |
| Elevato S.A. | |
| Elewatorsoft.pl Sp. z o.o. | Greater Poland |
| Elinext | |
| Elmark Automatyka S.A. | Masovian |
| Elmodis | Lesser Poland |
| ELNEX | Masovian |
| ELPRO-Bis Sp. z o.o. | Greater Poland |
| Elprojekt Sp. z o.o. | Łódź |
| Elprosys Sp. z o.o. | |
| ELTRON Sp. z o.o. | |
| Elympics | |
| ELZET | Lower Silesian |
| EmailLabs | |
| Emapa | Łódź |
| Emarketing Experts | Masovian |