| Techforward | |
| Technopark Strogino | Moscow |
| TECHNORED | |
| Tecnoplys | Tatarstan |
| Tele2 Россия | |
| Telecom Business Service | Moscow |
| Telecomax Ltd | Moscow |
| TemplateBest | Moscow |
| Tesla LLC | Ulyanovsk |
| Texcis Trade | Moscow |
| TextAppliance | |
| The Mop | Yaroslavl |
| Tigersoft | Moscow |
| Tiqum | |
| Tireal Company | Moscow |
| TKB Investment Partners, LLC | |
| TN Communications | Moscow |
| Tolko-Soft | Moscow |
| Tomsk State University of Architecture and Building | Tomsk |
| Tomsk State University of Control Systems and Radioelectronics | Tomsk |
| TopMission.ru | |
| Topvisor Co., Ltd | Saint Petersburg |
| Touch Instinct | Saint Petersburg |
| Tproger | |
| TrackStudio | Smolensk |
| Trade Telecom | Moscow |
| Traffic Reg Software | Moscow |
| Transitnet | Moscow |
| Travel.ru | |
| Treolan | |
| Trial Electronics | Moscow |
| TRINET.Group | |
| Trinity Corporate Projects | Moscow |
| Trionix | Astrakhan |
| Trsoft | Moscow |
| true.code | Irkutsk |
| ttgLabs | |
| Tuning-soft | Moscow |
| TUT.su | Moscow |
| Tutasoft | Moscow |
| TutorOnline | |
| TWIN | |
| Two Pilots | Moscow |
| Tydex | Saint Petersburg |
| UBIC Datahub | |
| Ubirator | |
| uCalc | |
| UCOZ | Moscow |
| UCP Investment Group | |
| UIDesign Group | Moscow |