| Biznes Spot Sp. z o.o. | |
| BiznesHub Sp. z o.o. | |
| BizTech Konsulting S.A. | |
| Black Pearls VC | |
| Black Pearls VC | Pomeranian |
| Blanet.pl | Greater Poland |
| Blare Technologies Sp. z o.o. | |
| Blast.pl | Lesser Poland |
| blaster.pl | Łódź |
| BLDG Venture | Lesser Poland |
| Blees Sp. z o.o. | |
| BLIM.pl | Pomeranian |
| Bling SH | |
| BLIRT S.A. | |
| Bloober Team, Inc. | Lesser Poland |
| Blox.pl | Masovian |
| Blue Dot Solutions Sp. z o.o. | |
| Blue House Technologies Sp. z o.o. | Masovian |
| Bluecloud Interactive | |
| Bluerank Sp. z o.o. | Łódź |
| Bluesoft Sp. z o.o. | |
| BMJ Sp. J. | Silesian |
| BMS | Masovian |
| BNP Paribas Bank Polska S.A. | |
| BOBO Coworking | |
| Bogumił Kamiński | |
| BOK SferaNET S.A. | |
| BOO.pl | Silesian |
| BoomBit | Pomeranian |
| Booste S.A. | |
| Boostsite Sp. z o.o. | |
| Boss Computers | Lesser Poland |
| Bouncer | |
| Bowil Biotech Sp. z o.o. | |
| BPSC | Silesian |
| BPX S.A. | Lower Silesian |
| Brainhub Sp. z o.o. | Silesian |
| Brainly | |
| Brainly.pl | |
| Brand24 | |
| Bravelab | |
| Bright Future | Masovian |
| Bright Inventions | |
| Britenet | |
| Britenet | |
| Brival Sp. z o.o. | |
| Brodex | Lubusz |
| Brontes Processing Sp. z o.o. | Silesian |
| bs4 business solutions Sp. z o.o. | Greater Poland |
| BSN Biersin | Lower Silesian |