| Transplanet | Haute-Garonne |
| Transway | |
| Tranzition | |
| Traveldoo | Hauts-de-Seine |
| Traveljuice | |
| Travelsoft | Paris |
| Travelsoft | |
| Traxens | |
| TreeDIM | Hauts-de-Seine |
| TreeFrog Therapeutics S.A.S. | |
| Trees Telecom | Vaucluse |
| Trenta | Loire |
| Tresorio | |
| TRI-EDRE | Var |
| Triagoz | Isère |
| Trialog | Paris |
| TRIAS Développement | |
| Tribalt | Alpes-Maritimes |
| Tribeca | |
| Tribofilm | Charente-Maritime |
| Tribord | Hauts-de-Seine |
| Tribun Health | |
| Triclic.com | Gironde |
| Tridek-One | |
| Trigone | |
| Trikaya | Jura |
| Trimane | |
| TroisPointZéro | |
| Trombino Suite | Paris |
| TRONICO | Vendée |
| Troopers | |
| Troops | |
| Tropee | |
| TRSb | Paris |
| Truffle 100 | Paris |
| Truffle Capital | Paris |
| Trust Telecom | Bouches-du-Rhône |
| TRUSTED SHOPS France S.A.R.L. | Nord |
| Trustpair | |
| Trustpair | |
| Tryane.com | Paris |
| TSE, énergie de confiance | |
| Tudigo | |
| Tuesday | |
| Tuleap | Isère |
| Turenne Capital Parternaires | |
| Turnover-IT | Paris |
| Tuto | Var |
| Tuto.com | Var |
| Tux-Logic | Bouches-du-Rhône |