| Tulsa Users of Macintosh Society | Oklahoma |
| Tulsa Web Devs | |
| TulsaConnect.com | Oklahoma |
| Tumbler Technologies + TRUMPower | California |
| Tumblr | New York |
| TuMeke, Inc. | |
| Tumeryk | |
| TumorGen, Inc. | California |
| Tuna Traffic | |
| Tunabelly Software, Inc. | |
| Tundra Technologies | |
| Tune Therapeutics | |
| Tune, Inc. | |
| Tuned Systems, Inc. | |
| Tuned-In Web Design | New York |
| TuneIn, Inc. | |
| TuneSat | |
| TuneTracker Systems, LLC | Wisconsin |
| Tungsten Brand Marketing | North Carolina |
| Tuniss Computer | California |
| Tunity | New York |
| Tunl | California |
| Tunnel Vision | |
| Tunnell Consulting, Inc. | Pennsylvania |
| Tupl, Inc. | Washington |
| Tuple Technologies | |
| TurbineOne, Inc. | |
| Turbo Metrics, LLC | Arizona |
| Turbo.net | Washington |
| TurboBridge | Maryland |
| TurboCAD | California |
| TURBOCAM, Inc. | |
| TurboLaw | Massachusetts |
| Turbonomic, Inc. | Massachusetts |
| TurboPlay Corporation | |
| TurboSoft, Inc. | Wyoming |
| Turbosoftwarebyte, LLC | Wyoming |
| TurboStats | New Jersey |
| Turbotek Computer Corporation | New Hampshire |
| TurboTenant, Inc. | Colorado |
| TurboTools Corporation | California |
| TurboWebs, LLC | Missouri |
| Turec Advertising | |
| TurfCentric | Texas |
| Turing | California |
| Turing Medical Technologies, Inc. | |
| Turing Technology Associates, Inc. | Delaware |
| TuringSense, Inc. | |
| TurinTech AI, Inc. | |
| Turion Space | |