| ICsec S.A. | |
| ICU Tech | |
| IDEA commerce S.A. | |
| IDEAMOTIVE Sp. z o.o. | Masovian |
| IdeaPlace | |
| Ideo Sp. z o.o. | Masovian |
| Ideone.com | Pomeranian |
| IdeoSoftware | |
| IDHost.pl Sp. z o.o. | Opole |
| iDMK Sp. z o.o. | |
| IDO Electronics | |
| iFEMA | Lesser Poland |
| Ignico Sp. z o.o. | |
| Ignited | |
| IISS Systemy Informatyczne Spółka Jawna | Łódź |
| Ikaria | Łódź |
| Ilario Sp. z o.o. | Masovian |
| iLumio | |
| Imag Centrum Oprogramowania | Greater Poland |
| Image Electronics | West Pomeranian |
| Image Recording Solutions Sp. z o.o. | Masovian |
| Imaggo | |
| Imagine Digital Arts Ltd | Lower Silesian |
| Imapp Sp. z o.o. | |
| Imedio | Subcarpathian |
| IMER Systems | |
| Imfotech.pl | Lower Silesian |
| Immersion Games S.A. | |
| Immunity Systems Sp. z o.o. | |
| IMOBIT Sp. z o.o. | |
| Imoli | |
| Impact Media sp. z o.o. | Lower Silesian |
| Impel | Masovian |
| Impera Alfa Alternatywna Spółka Inwestycyjna Sp. z o.o. | |
| ImpleCode | |
| Implex | |
| Improveit Solutions | |
| IMS sensory media | |
| In Search | |
| IN Team | |
| in+ui | |
| IN-Software Polska Sp. z o.o. | Greater Poland |
| InBIT Sp. z o.o. | |
| INcode | |
| Incuvo S.A. | |
| inDigital | |
| Indoorway | |
| INEA | Greater Poland |
| Inelum Polska Sp. z o.o. | |
| Inero Software | |