| Business Tronics | |
| Business Warrior | Arizona |
| Business Wire, Inc. | |
| Business-Software.com | California |
| Business.com | |
| BusinessCom, LLC | |
| BusinessRocket.net | California |
| BusinessTelephone.com | Florida |
| BusinessVision | |
| BusinessWare Services, Inc. | Arizona |
| Businessware Technologies, Inc. | Texas |
| BusinessWebshop.Com | Florida |
| Businesswise Media, Inc. | California |
| Businets, Inc. | Virginia |
| Busker Music, Inc. | |
| BUSlink | California |
| Busse Design USA, Inc. | California |
| Bust Out | |
| Bustrace Technologies, LLC | California |
| Busybusy | |
| BusyConf, LLC | |
| BusyKid | Arizona |
| Butane, LLC | |
| Butler & Associates | Tennessee |
| Butler Consultants | |
| Butler Information Technologies, Inc. | Texas |
| Butler Technology | Vermont |
| Butler University Computer Science and Software Engineering | Indiana |
| Butler University Mathematical Sciences | Indiana |
| Butler/Till | |
| Butlr | California |
| Buto Corporation | |
| Butte College | California |
| Butter Payments | |
| Buttercloud | |
| ButterCMS | Illinois |
| Butterfly Biosciences | |
| Butterfly Network, Inc. | Massachusetts |
| Butterfly Technology, LLC | |
| ButterflyMX, Inc. | New York |
| Butternut Systems | Vermont |
| Button | New York |
| Buttondown, LLC | Washington |
| Buurst | |
| Bux-Mont Macintosh Users Group | Pennsylvania |
| Buxfer, Inc. | California |
| Buxton | Texas |
| Buy Local Media Group | |
| Buy Real Marketing, Inc. | |
| Buy4Less, Inc. | Colorado |