| H&W Computer Systems, Inc. | Idaho |
| H+W Test Products, Inc. | Massachusetts |
| H-11 Digital Forensics, LLC | Utah |
| H-D Solutions | Colorado |
| H-Square Corporation | California |
| H. L. Snyder Medical Foundation | |
| H.I.G. Capital, LLC | Florida |
| H.L. Dalis, Inc. | New York |
| H.R. Distributions | Maine |
| H1 | New York |
| H1 Web Development | |
| H1BJobSeekers | Kansas |
| H2 FinTech | Colorado |
| H2 Global, Inc. | California |
| H2 Wellness | California |
| H2-O2 | Tennessee |
| H20 Capital Innovation | Florida |
| h2b creative | |
| H2bid, Inc. | |
| H2H Marketing | Pennsylvania |
| H2H Solutions, Inc. | Michigan |
| H2Hosting.com | California |
| H2I Online | Michigan |
| H2M | North Dakota |
| H2M Solutions | |
| H2O.ai | California |
| H3 Dynamics, LLC | Texas |
| H3Tech, Inc. | |
| H3X Technologies, Inc. | Colorado |
| HaA Product Development | |
| HAAS Alert | Illinois |
| HAAS, Inc. | |
| Haast | |
| Habanero | |
| Haberfeld | |
| Habit Analytics, Inc. | New York |
| Habitat Visual Communications | New Jersey |
| Habu, Inc. | California |
| HACC | Pennsylvania |
| Hachisoft Corporation | Washington |
| Hack for Inclusion | Massachusetts |
| Hack for LA | California |
| Hack Reactor, LLC | California |
| Hack the Hood | |
| Hack.Diversity, Inc. | |
| Hackaday | California |
| Hackafe.org | Maryland |
| Hackajob | New York |
| Hackbright Academy | California |
| HackDFW | Texas |