| Princity | |
| Printor Sp. z o.o. | Łódź |
| Prismake | |
| Pro Automatic Sp. z o.o. | |
| Pro Web Software | |
| Pro-ANS | Lower Silesian |
| Pro-position | Masovian |
| PRO-STER Sp. J. | Łódź |
| Probe Sp. z o.o. | |
| Procad S.A. | Pomeranian |
| Procom System S.A. | |
| ProData | |
| Prodefinity | |
| Prodio Sp. z.o.o. | |
| PRODO Agencja Reklamowo Informatyczna | Greater Poland |
| PRODromus.pl | |
| Producer | Świętokrzyskie |
| Proexe | Masovian |
| Proexe Sp. z o.o. | |
| PROF computer | Silesian |
| Profabrica | Masovian |
| Proferis | Subcarpathian |
| Profesjonalni | Kuyavian-Pomeranian |
| Proffnet Sp. z o.o. | Silesian |
| Profi-Data Sp. z o.o. | West Pomeranian |
| Profiart | |
| Profil Software Sp. z o.o. | |
| ProfiPIEK | Masovian |
| Profisoft | |
| Profitroom Sp. z o.o. | Greater Poland |
| Proformat | |
| PROGMATIQ | |
| Programa Software House Sp. z o.o. | |
| Programerzy.pl | |
| Prographers Sp. z o.o. | |
| ProgresNet | Masovian |
| Progress Automatyka Sp. z.o.o. | |
| Proidea | |
| Project: People Poland Sp. z o.o. | |
| PROJECTIC | |
| Projekt Studio | Lower Silesian |
| Prolan | Silesian |
| ProLine | Lower Silesian |
| ProLogistica Soft Sp. z o.o. | |
| Prologix | |
| Promar | Warmian-Masurian |
| Promarket Computers Sp. z o.o. | Lesser Poland |
| Promatik Sp. z o.o. Sp. k. | Świętokrzyskie |
| Promotech | |
| Pronos Sp. z o.o. | |