| Tatam Digital Services, LLC | Florida |
| Tatango, Inc. | Washington |
| Tate Design, LLC | |
| Tate Technologies, Inc. | Washington |
| Tateeda | California |
| Tatem Web Design, LLC | Florida |
| Tatems | Nevada |
| Tatitlek Corporation | Alaska |
| Tatsoft, LLC | Texas |
| Tattle | New York |
| Tatum | Florida |
| Tatum Consulting, LLC | Texas |
| Tau Ventures | California |
| Taubyte | Texas |
| Taulia | California |
| Taurean Consulting Group | Nevada |
| Taurus Plus | Maine |
| Taurus Quadra | |
| Taurus Software | California |
| Taurus Vascular | |
| Taut | Delaware |
| Tava Health, Inc. | |
| Tavant | California |
| Tavanta Therapeutics | |
| Tavily, Inc. | |
| Tavily, Inc. | |
| Tavo Biotherapeutics, Inc. | |
| Tavoca | Texas |
| Tavolo, Inc. | Minnesota |
| Tavro AI, LLC | Florida |
| Tavus | California |
| Tavve | North Carolina |
| Taw Electronics, Inc. | California |
| tawakkol.com | Michigan |
| tawk.to, Inc. | Nevada |
| Tawkify, Inc. | |
| Tax Systems | |
| Tax Technologies, Inc. | New Jersey |
| TaxAct | Iowa |
| TaxBit | Utah |
| TaxCloud | Connecticut |
| TaxGPT, Inc. | |
| TAXIS Pharmaceuticals, Inc. | |
| TaxJar | Massachusetts |
| Taxo,ai, Inc. | |
| TaxProper, Inc. | Illinois |
| TaxTaker, Inc. | |
| TaxTime USA, Inc. | Michigan |
| Taxware Systems | California |
| TayCo Brace, Inc. | Indiana |