| Grupa Mobile-Tech | Lesser Poland |
| Grupa Neomedic | |
| Grupa Pino.PL Sp. z o.o. | Masovian |
| Grupa Pracuj S.A. | |
| Grupa Romi | Masovian |
| Grupa Silesia Sp. z o.o. | |
| Grupa TENSE Polska | |
| Grupa WB | |
| Grupa.IT | |
| Grupapff | Masovian |
| GrupaTAKA | |
| GS Services | |
| GSM Support | Lesser Poland |
| GTECH informatyka & reklama | Silesian |
| GTI Sp. z o.o. | Masovian |
| H&D Interactive | |
| HackControl | Lesser Poland |
| Hacod Sp. z o.o. | |
| Hadatap Sp. z o.o. | |
| Hadd elektronika | Lower Silesian |
| Hadden | Łódź |
| Hakin9 Media Sp. z o.o. Sp. k. | Masovian |
| HamRadioShop | Łódź |
| Handsoncode Sp. z o.o. | |
| HappyTeam | |
| HardIT | |
| Hards.pl | Greater Poland |
| Hardwax | Masovian |
| Havencode Sp. z o.o. | |
| HBZ Sp. z o.o. | Masovian |
| HCM Deck | |
| HDF Software Sp. z o.o. | Lower Silesian |
| HDLab | Lower Silesian |
| Healthnomic S.A. | |
| Heapmail Internet Solutions Sp. z o.o. | Lower Silesian |
| Hedepy Sp. z o.o. | |
| Hedgehog Fund | |
| Helion.pl Sp. z o.o. | |
| Hello! Studio | Lesser Poland |
| Helping Hand | |
| HELUKABEL Polska Sp. z o.o. | Masovian |
| HeroCoders Sp. z o.o. | |
| Heroify | |
| HERON | Lower Silesian |
| Heuristic | Masovian |
| Heuthes Sp. z o.o. | |
| HeySpace | |
| Hi Frankie | |
| Hicron Software | |
| hieviimedia.pl | |