| Tako e.K. | North Rhine-Westphalia |
| takomat Agentur GbR | North Rhine-Westphalia |
| Taktile GmbH | |
| Taktum Informatik GmbH | North Rhine-Westphalia |
| TAL.DE Klaus Internet Service GmbH | North Rhine-Westphalia |
| Tale About Data | |
| Taledo GmbH | |
| Talenteco GmbH | |
| Talentee | |
| TalentiMotion GmbH | Hesse |
| Talentry GmbH | Bavaria |
| TalentSpace GmbH | |
| Talenttic | |
| Talentwunder GmbH | |
| Talicom GmbH | Lower Saxony |
| talk+ GmbH | |
| Talke Networks GmbH | |
| Talkline GmbH & Co. KG | Schleswig-Holstein |
| Tallence GmbH | Hamburg |
| Talon.One GmbH | |
| Talpasolutions GmbH | |
| Tampermonkey | |
| Tamschick Media + Space GmbH | |
| TamTech GmbH | |
| Tandem Health Global GmbH | |
| Tandler.com Gesellschaft für Umweltinformatik mbH | Bavaria |
| Tangany GmbH | |
| Tangerine-Software | Bavaria |
| Tankerkönig UG (haftungsberschränkt) | Bavaria |
| Tanmar Webentwicklung | Berlin |
| Tanso Technologies GmbH | |
| TANTE PUH Onlineservice | Hesse |
| Tänzermedien GmbH | North Rhine-Westphalia |
| Tape It Music GmbH | |
| tapLab GmbH | |
| Tapline | |
| Tapped GmbH | |
| Taquiri | Hesse |
| TARA Systems GmbH | Bavaria |
| Tarent Solutions GmbH | Hesse |
| Target Global | Berlin |
| Target Partners | Bavaria |
| Target Software Solution GmbH | Baden-Württemberg |
| Target Training GmbH | |
| TargetVideo GmbH | |
| Targomo Casafari GmbH | |
| TargoSoft IT-Systemhaus GmbH | North Rhine-Westphalia |
| Taros Chemicals GmbH & Co. KG | |
| Tarox AG | |
| Tascan Service GmbH | North Rhine-Westphalia |