| RapidMiner, Inc. | Massachusetts |
| Rapido Métal, Inc. | |
| Rapidops, Inc. | |
| RapidPulse, Inc. | Florida |
| RapidRatings | New York |
| RapidsAI | |
| RapidScale | |
| RapidSilicon | |
| Rapidsoft Systems, Inc. | New Jersey |
| RapidSSLonline | Florida |
| Rapidus Corporation | Colorado |
| Rapigen, Inc. | |
| Rapko Tech | Virginia |
| RapL, Inc. | |
| Rappi, Inc. | |
| Rapport | |
| Rapport IT | Delaware |
| Rapport Talents | |
| Rapport Therapeutics | |
| Rapptr Labs | |
| Rapt Media | |
| RAPT Therapeutics, Inc. | |
| Raptamer Discovery Group | Texas |
| Raptive | New York |
| Raptivity | Washington |
| Raptor Digital Marketing | |
| Raptor Maps, Inc. | Massachusetts |
| Raptor PCS | North Dakota |
| Raptor Systems, Inc. | District of Columbia |
| Raptor Technologies | Texas |
| Rapture Studio | California |
| Rapunzl | Illinois |
| RaQualia Pharma, Inc. | |
| Rare Bird, Inc. | Indiana |
| Rare Disease Therapeutics, Inc. | |
| Rare Earth | New York |
| Rare Ideas, LLC | New York |
| Rare Medium Atlanta, LLC | Georgia |
| Rare Therapeutics, Inc. | |
| Rare Volume | |
| Rarecells, Inc. | |
| RareCyte, Inc. | Washington |
| Rarefied Atmosphere, Inc. | Texas |
| Rareheron Web Design | Oregon |
| RareMoon Consulting, Inc. | District of Columbia |
| Rareview | California |
| Raritan Pharmaceuticals, Inc. | |
| Raritan, Inc. | New Jersey |
| Ras Labs | Massachusetts |
| Rasa Technologies, Inc. | California |