| ticket. International Software Trading GmbH & Co. KG | Rhineland-Palatinate |
| TIDE GmbH | |
| Tidely GmbH | |
| Tidely GmbH | |
| TIER Mobility SE | |
| Tiersch & Co. Handelsges. mbH | North Rhine-Westphalia |
| Tigerbytes GmbH | |
| Tigersoft Systemhaus | Lower Saxony |
| tiggersWelt.net | Baden-Württemberg |
| Tignum Holding GmbH | |
| TIGRIS Elektronik GmbH | Berlin |
| Tiki-Taka Media GmbH | |
| tiksys GmbH | |
| TILL.DE GmbH | Lower Saxony |
| Till.net GmbH & Co. KG | North Rhine-Westphalia |
| Tilla | |
| Tillhub | Berlin |
| Tilta Fintech GmbH | |
| Tim Consulting | |
| Timbernet AG | Saxony |
| TimberTec AG | Schleswig-Holstein |
| TiMe Networks IT-Systemhaus GbR | Bavaria |
| time:matters GmbH | |
| timeghost GmbH | |
| Timeless | |
| Timemaster | Lower Saxony |
| TimePanic | Bavaria |
| Timespin Digital Communication GmbH | Thuringia |
| Timesys AG | North Rhine-Westphalia |
| TIMETOACT Software & Consulting GmbH | North Rhine-Westphalia |
| TIMIFY | |
| Timm Richter - Internet Consulting | Saarland |
| Timme Hosting GmbH & Co. KG | |
| timmersive UG (haftungsbeschränkt) | |
| TimO-Time Management Office GmbH | Hesse |
| Tintenklex Legasthenie Software | Schleswig-Holstein |
| Tintenmarkt | Rhineland-Palatinate |
| tintX-Shop | Thuringia |
| TinyWebGallery | Bavaria |
| TiProNet | Saxony |
| Tiptap | |
| TiPTO Internetagentur | North Rhine-Westphalia |
| TIQ Solutions GmbH | Saxony |
| Tiracon GbR | Saxony |
| Tirastel GmbH | |
| Tiron Service GmbH & Co. KG | North Rhine-Westphalia |
| TIS Consulting & Logistics GmbH | |
| TIS Technische Informationssysteme GmbH | North Rhine-Westphalia |
| tisoware Gesellschaft für Zeitwirtschaft mbH | Baden-Württemberg |
| tisoware Gesellschaft für Zeitwirtschaft mbH | |