| 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 | |
| Grupapff | Masovian |
| GSM Support | Lesser Poland |
| GTECH informatyka & reklama | Silesian |
| GTI Sp. z o.o. | Masovian |
| HackControl | Lesser Poland |
| 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. | |
| Handsoncode Sp. z o.o. | Pomeranian |
| HappyTeam | |
| HardIT | |
| Hards.pl | Greater Poland |
| Hardwax | Masovian |
| 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 |
| Hedgehog Fund | |
| Helion.pl Sp. z o.o. | |
| Hello! Studio | Lesser Poland |
| HELUKABEL Polska Sp. z o.o. | Masovian |
| HeroCoders Sp. z o.o. | |
| Heroify | |
| HERON | Lower Silesian |
| Heuristic | Masovian |
| Heuthes Sp. z o.o. | |
| HeySpace | |
| High Solutions | Greater Poland |
| Highcom Sp. z o.o. | Lublin |
| HigoSense Sp. z o.o. | |
| HintMine | Lesser Poland |
| HIT Enterprises | Pomeranian |
| HLG Sp. z.o.o. | Subcarpathian |
| Holdapp | |
| Home.pl | West Pomeranian |
| HomeDoctor Sp z o.o. | |
| Horyzont Technologie Internetowe | Greater Poland |