| Bioptimus | |
| BIOS Informatique | Alpes-de-Haute-Provence |
| BioSerenity | |
| Biosynex S.A. | |
| Biotech Santé Bretagne | |
| Biotopia | |
| Biotrial | |
| BioValley France | |
| Biowest | |
| Biowest S.A.S. | |
| BioXtal S.A.R.L. | |
| BiPER Therapeutics | |
| Bipp Consulting | Métropole de Lyon |
| Biron Data | |
| Bisatel opérateur télécom | Gironde |
| Bisis | Seine-et-Marne |
| Biskot S.A.R.L. | Paris |
| Bitstack S.A.S. | |
| bizKor | |
| Bizlink | Métropole de Lyon |
| Bizon | |
| BK Systèmes | Isère |
| Blabla | |
| BlaBlaCar | Paris |
| Black Tiger | |
| BlackFin Capital Partners | |
| BlackFin Tech | |
| Blackfire.io | |
| Blacksmith S.A.S. | |
| BLACKT | |
| Blank | |
| Bleckwen | |
| Bleemeo | |
| Bleexo | |
| Blend Web Mix | Métropole de Lyon |
| Bleu Digital | Eure-et-Loir |
| Bleupiment | Métropole de Lyon |
| BliNK Biomedical S.A.S. | |
| Blisce | |
| BLIWE | Paris |
| Blobr S.A.S | Paris |
| Blockchain Conseil | Yvelines |
| Blockchain France | Paris |
| BlockchainyourIP | |
| Blog du Modérateur | |
| Bloomin | |
| Bloomsters | |
| BLQ Software | Nord |
| Blue Agency | Paris |
| Blue Bees Therapeutics | |