| Tatra Trucks, a.s. | |
| TC Business School | |
| TC Inter-Informatics, a.s. | |
| TCL Consulting, a.s. | |
| TCL DigiTrade, s.r.o. | |
| TCS net, s.r.o. | |
| TeamOnline, a.s. | Prague |
| TEAS, spol. s r.o. | Zlín |
| Techcentrum, s.r.o. | |
| TechFides Solutions, s.r.o. | South Moravian |
| TechFides Solutions, s.r.o. | |
| Techloop | |
| Techmobil Cheb, s.r.o. | |
| Technidok, s.r.o. | |
| TECHNISERV IT | |
| Technodat | Zlín |
| TECHNODAT Develop | Zlín |
| Technoline, s.r.o. | |
| Technologické centrum AV ČR | Prague |
| Technosoft, spol. s r.o. | |
| Technoton Engineering | |
| TechProg, s.r.o. | |
| TechSoft Engineering, spol. s r.o. | |
| TELE3 | Prague |
| TELESIS Technologies, s.r.o. | Prague |
| Telmo, spol. s.r.o. | Prague |
| TelPro, spol. s r.o. | |
| Tenzor hosting | Prague |
| Terasoft, a.s. | |
| TERRA computer systems | South Moravian |
| TERSYS, s.r.o. | |
| Tescan Group, a.s. | |
| TESCO SW, a.s. | Olomouc |
| TH Soft, s.r.o. | Pardubice |
| The Booster Labs, s.r.o. | |
| The Cave | Prague |
| Thein Digital, s.r.o. | |
| THINline, s.r.o. | Prague |
| Tibo Software | Pardubice |
| Tilia Impact Ventures | |
| Tiscali.cz | Prague |
| TKK-HIG, s.r.o. | |
| TKR Jašek, s.r.o. | |
| TMetric | |
| Tolgee, s.r.o. | |
| Top Digital Group, s.r.o. | |
| TOP TECH, s.r.o. | Hradec Králové |
| TopMonks, s.r.o. | |
| TOPOL.io | |
| TopTech Brno, spol. s r.o. | |