| Inetic | Lublin |
| Inetum Polska | |
| Inetum Polska Sp. z o.o. | |
| Inf-Bud Sp. z o.o. | Masovian |
| Infermedica | |
| InfiniteDATA | |
| InfiniteProgress | |
| Infinity Group | |
| Info baza sp. z o.o. | Greater Poland |
| Info-Kam | Świętokrzyskie |
| Info-Logic | Silesian |
| Info-Projekt IT Sp. z o.o. | |
| Infocal Sp. z o.o. | Greater Poland |
| Infocity Sp. z o.o. | Pomeranian |
| Infocomp Sp. z o.o. | Kuyavian-Pomeranian |
| Infolet Sp. z o.o. | |
| Infomex Sp. z o.o. | Silesian |
| INFOMEX Sp. z o.o. | |
| Infonet Projekt | |
| Infoprojekt | Pomeranian |
| Inforkom | Masovian |
| Informatyka na Akademi Morskiej w Szczecinie | West Pomeranian |
| Inforsys | |
| InfoSerwis | Greater Poland |
| Infoshare | |
| infoSoftware Polska Sp. z o.o. | |
| Infotraining | Lesser Poland |
| INFOX | Subcarpathian |
| Infra S.A. | Opole |
| InfraCOM.pl | Masovian |
| Infralabs | Kuyavian-Pomeranian |
| InFront | Masovian |
| Ink Solutions Sp. z o.o. | |
| INKsearch | |
| Inkubator Biznesowy Krakow | |
| inmedium.pl | |
| Innovation Nest | |
| Innovation Software Sp. z o.o. | |
| Innoventure Sp. z o.o. | Lesser Poland |
| Innowise Group | |
| Innowise Sp. z o.o. | |
| Inovo | |
| InPay S.A. | |
| InPhoTech | |
| InPhoTech Sp. z o.o. | |
| InPost Sp. z o.o. | |
| Inprox Sp. z o.o. | |
| Inquel Sp. z o.o. | |
| iNS | Lower Silesian |
| Ins2outs | Lower Silesian |