| BlippaCo AB | |
| Blixt Tech AB | |
| Block Zero AB | |
| BlueCall | |
| Bluefish Pharmaceuticals AB | |
| Blueflow Energy Management AB | |
| Bluell Sverige | |
| Bluerange Sweden AB | Jönköping |
| Blueye | |
| BMV Studio | Stockholm |
| BNP Paribas in Sweden | |
| BoardClic | |
| Boardeaser AB | |
| Bob Reklambyrå | |
| Boclipse | Uppsala |
| BOCOM | Västra Götaland |
| Bodil Fastigheter AB | |
| Bofink | |
| Boka Global AB | |
| Bokadirekt | |
| Bokafix AB | |
| Bokio Group AB | |
| Bolagsverket | |
| Bonanza Location | |
| BonBot AB | |
| Bondi Executive Search | |
| Bondtech AB | |
| Boneprox | |
| Bonesupport AB | |
| Bonit Capital | |
| Bonnier Ventures | Stockholm |
| Bontouch | |
| Booksquare AB | |
| Boostified Pay | |
| Boostify | |
| Boreal Software Company | |
| Borgo AB | |
| Botbox.com | Stockholm |
| Botech AB | |
| Botstation | Stockholm |
| Box of Energy AB | |
| Boxxy AB | |
| Bozzanova AB | Västra Götaland |
| Brain Stimulation AB | |
| Brainsafe | |
| BrainZell | |
| Brandox AB | |
| Brandson.se | |
| Brave Agency Sweden AB | |
| Breaking Media AB | |