| Black Dog Marketing | California |
| Black Dog Venture Partners | Florida |
| Black Duck Software, Inc. | |
| Black Egg Syndicate | North Carolina |
| Black Flag Creative, LLC | California |
| Black Founders | |
| Black Hat | Nevada |
| Black Hawk College | Illinois |
| Black Hills Information Security | |
| Black Hills State University | South Dakota |
| Black Hills State University Mathematics | South Dakota |
| Black Hills Towers, LLC | South Dakota |
| Black Horse Agency, Inc. | |
| Black Ice Software, LLC | Florida |
| Black is Tech Conference | |
| Black Jack Productions, LLC | |
| Black Kite | |
| Black Knight Publishing | |
| Black Knight, Inc. | Florida |
| Black Legend Capital, LLC | California |
| Black Mountain Software | Montana |
| Black Operator Ventures, LLC | California |
| Black Orchid Laboratories, LLC | |
| Black River Computer, Inc. | Ohio |
| Black River Technical College | Arkansas |
| Black Sheep Networks, Inc. | Massachusetts |
| Black Star Graphics | California |
| Black Swan Media Co | |
| Black Tech Jobs, LLC | Illinois |
| Black Tech Nation | Pennsylvania |
| Black Tech Nation Ventures | Pennsylvania |
| Black Tech PipelineTM, LLC | |
| Black Tech Talent | Minnesota |
| Black Twig Marketing + Communications | |
| Black Unicorn Factory | |
| Black Widow Tech, LLC | |
| Blackbaud, Inc. | South Carolina |
| Blackbelt.ai | California |
| BlackBird | |
| Blackbird Digital | |
| Blackbird e-Solutions, LLC | Pennsylvania |
| Blackbird Labs, Inc. | |
| Blackbird.ai | New York |
| Blackbox Systems, LLC | New Jersey |
| BlackBox Vision | |
| BlackBoxStocks | |
| Blackburn College | Illinois |
| Blackcart, Inc. | |
| BlackCloak, Inc. | |
| Blackdot Capital, LLC | Nevada |