| Blakely+Company | |
| Blameless, Inc. | |
| Blancco Technology Group | Texas |
| Blanchard Consulting Group | |
| Blanchard Systems, Inc. | Louisiana |
| Bland.ai, Inc. | |
| Blank Metal | |
| Blank Slate Factory, Inc. | New York |
| Blank Space, LLC | |
| Blank Ventures | |
| Blank, Inc. | |
| Blankfactor, LLC | |
| BLANKSPACES Coworking | |
| Blarneystone, LLC | Connecticut |
| Blaser Consulting | Washington |
| Blast Internet Services | North Carolina |
| Blastcomm | Illinois |
| Blaster Web Services | |
| BlastPoint | |
| Blavity, Inc. | |
| Blaze | California |
| Blaze Bioscience, Inc. | Washington |
| Blaze ImgConvert | North Carolina |
| Blaze Media Pro | North Carolina |
| Blaze Portfolio | |
| Blaze Systems | Delaware |
| Blazeclan Technologies | New York |
| Blazed Labs, LLC | |
| BlazeMeter | California |
| BlazeMultimedia, LLC | |
| Blazent | California |
| Blazeware | Virginia |
| Blazin' Technology | Texas |
| Blazing Electronics | Kansas |
| Blazit Marketing | |
| Blazonco | California |
| BLCKMGC | California |
| BLDR | Virginia |
| BLDX | Colorado |
| Bledsoe Telephone Cooperative, Inc. | Tennessee |
| Bleeding Edge | |
| BleepingComputer | New York |
| Bleevit Interactive, LLC | |
| Blend | California |
| Blend Interactive | South Dakota |
| Blend New Media Production | |
| Blend250 | Maryland |
| Blended Sense | Texas |
| Blendo Games, LLC | California |
| Blennd, LLC | |