| Université Sorbonne Nouvelle - Paris 3 | Paris |
| Université Toulouse - Jean Jaurès | Haute-Garonne |
| Université Toulouse 1 Capitole | Haute-Garonne |
| Université Toulouse III - Paul Sabatier | Haute-Garonne |
| Université Virtuelle Environnement et Développement Durable | Paris |
| Univity S.A.S. | |
| Unkle | |
| Unlatch | |
| Unlimitd | |
| Unooc | |
| Unow | |
| UNOWHY | Hauts-de-Seine |
| Unseenlabs | |
| Up6load | Hérault |
| Upciti | |
| uPesy Electronics S.A.S.U. | |
| Upfactor | |
| Upflow | Paris |
| Upfund | |
| Uplix | |
| Upmind | |
| UPMOTION | Vendée |
| Upsideo | |
| Upsilone | Essonne |
| Upstride S.A.S. | |
| Uptodown | |
| Upway | |
| UrbanHub | |
| Urbilog | Nord |
| URMET | |
| UroMems | |
| US Robotic Distribution | Vaucluse |
| Usabilis | Hauts-de-Seine |
| USB-XPress.com | Puy-de-Dôme |
| Use Design | Paris |
| USeed | |
| USER Agency | Nord |
| User Studio | Paris |
| USERADGENTS | |
| Userware | |
| Useweb | Ille-et-Vilaine |
| USF - Utilisateurs SAP Francophones | Paris |
| USTS | |
| UT Hospitality | |
| Utilisateurs Haut-Rhinois de Linux et des Logiciels Libres | Haut-Rhin |
| Utocat | |
| Utopia Thinking Systems | Gironde |
| Utopiaweb | Ille-et-Vilaine |
| Utopsys | Gironde |
| UVET France | |