| Balt Media | Pomeranian |
| BaltRobotics Sp. z o.o. | |
| Bambit | |
| Bantel Telekom S.C. | Pomeranian |
| Bart Zalewski | |
| Bartosz Haniszewski | Łódź |
| bbSoft WebDesign | Lower Silesian |
| Bcf-software.com | |
| BCT Sp. z o.o. | Kuyavian-Pomeranian |
| BDT Automatyka | Subcarpathian |
| BeDigital Sp. z o.o. | |
| Beecommerce.pl | |
| Bees & Honey 360 Sp. z o.o. | |
| Beesfund S.A. | |
| BEIT | |
| Bellwether Rocks | |
| Beside the Park | |
| Besite | |
| Best Capital Sp. z o.o. | |
| Best-Media | Masovian |
| Best.Net | Greater Poland |
| Betacom | Masovian |
| BetaSoft Sp. z o.o. | Silesian |
| Better Software Group S.A. | Lower Silesian |
| Bezpieczna Firma Sp. z o.o. | Łódź |
| BH-Wandex | Masovian |
| BHMsoft | Greater Poland |
| Bielbit | |
| Bielska Wyższa Szkoła im. Józefa Tyszkiewicza | |
| BigCom | Subcarpathian |
| Billennium | |
| BillTech | |
| BinarApps Sp. z o.o. | |
| Bine Sp. z o.o. | |
| Bioavlee S.A. | |
| BioCam | |
| Bioceltix S.A. | |
| BioEnergy Project Sp. z o.o. | |
| Biomed Lublin S.A. | |
| Biostra | |
| Bioton S.A. | |
| Biotts S.A. | |
| BioVectis | |
| Biovico Sp. z o.o. | |
| BIPLO | Kuyavian-Pomeranian |
| BIS komputery Kowalski | Silesian |
| Bit Adventure | |
| Bit Computer | Lesser Poland |
| BitBag | |
| Bitecode.tech | |