| HiveMind Studio | |
| Hivemine | Washington |
| Hiver | California |
| Hivex | |
| HiWAAY Information Services, Inc. | Alabama |
| HIX AI | |
| HJMT Public Relations, Inc. | |
| HK Associates | |
| HK Surgical, Inc. | California |
| HKA Marketing | California |
| HKA Marketing Communications | |
| Hkdolts, LLC | |
| HKL Research, Inc. | Virginia |
| HL Computer, Inc. | Georgia |
| HLA Data Systems, LLC | Texas |
| HLJ Creative, LLC | |
| HLM Venture Partners | |
| HLS Therapeutics, Inc. | |
| HM Electronics, Inc. | California |
| HM Marketing | |
| HMA PR | |
| HMB | Ohio |
| HMC INQ | |
| Ho Chien Electronic Group, Inc. | California |
| HO2 Partners | Texas |
| HOA Express, Inc. | |
| Hoaloha Robotics | Washington |
| Hobart and William Smith Colleges | New York |
| Hobart and William Smith Colleges Department of Mathematics and Computer Science | New York |
| Hobart Laboratories, Inc. | Minnesota |
| HOBI International, Inc. | Illinois |
| HoBITS Technologies | Florida |
| HOC | New York |
| Hochman Consultants, LLC | Connecticut |
| HockeyGurl Designs, LLC | |
| Hocking College | Ohio |
| Hodge Interactive | |
| Hodgson Consulting & Solutions Ltd | Illinois |
| HOF Capital | |
| Hoffbeck + Co., LLC | |
| Hoffman Creative Agency | |
| Hoffman Engineering, LLC | |
| Hoffman Marketing Communications, Inc. | California |
| Hoffman Miller Advertising | |
| Hoffnmazor, LLC | |
| Hofstra University | New York |
| Hofstra University Department of Computer Science | New York |
| Hog Bay Software | Maine |
| Hoglund Advertising & Analytics | |
| Hoist | |