| EMBETECH Sp. z o.o. | |
| EMBIQ Sp. z o.o. | |
| EMC Group | Lesser Poland |
| EMC Instytut Medyczny S.A. | |
| EMFIRE Sp. z o.o. | |
| EMIT Sp. z o.o. | Lower Silesian |
| Emiter Sp. z o.o. | Silesian |
| Emphie | |
| Empirica | Lower Silesian |
| Empirica Sp. z o.o. | |
| Emplo | |
| Empressia | |
| EMS Partner | |
| Enablers Sp. z .o.o. | |
| ENAP S.A. | Masovian |
| Enclave Games | |
| Endora | |
| Enetech Sp. z o.o. | |
| Eneton Marek Kuczyński | Lubusz |
| Engine Sp. z o.o. | Pomeranian |
| Enginious | |
| Eniverse | |
| Enovatio Sp. z o.o. | Masovian |
| Ensera | |
| EnterIT | Lesser Poland |
| Enterso | West Pomeranian |
| Enxoo Sp. z o.o. | Masovian |
| Enzo Sp. z o.o. | Lublin |
| eo Networks S.A. | |
| EP&M | West Pomeranian |
| EPA Omnia Sp. z o.o. | West Pomeranian |
| EPC System Outsourcing IT | Masovian |
| Epic Agency | |
| EPIC VR | |
| Epinote Sp. z o.o. | |
| Epione Sp. z o.o. | |
| ePMflow | |
| EPOX Interactive Media House | Masovian |
| EPRO | Podlaskie |
| EQ System | |
| Equitin Advisors Sp. z o.o. | |
| Ergonode Sp. z o.o. | |
| ESB Serwis Sp. z o.o. | Masovian |
| Esbud | Greater Poland |
| Escola S.A. | |
| ESKOM IT Sp. z o.o. | Masovian |
| ESOD Sp. z o.o. Sp. k. | Greater Poland |
| eSourcing S.A. | |
| Espeo Software Sp. z.o.o. | Greater Poland |
| Esperans-soft | Lower Silesian |