| Name | Region |
|---|---|
| Work In Paris | |
| WorkAdventure | |
| WorkflowGen | Paris |
| Worklib | |
| Workshop | |
| World Game | |
| World People | Yvelines |
| WorldCast Systems | Gironde |
| Worldline S.A. | |
| Wortis S.A.S. | |
| Wozaik | Paris |
| WPFR | Paris |
| Wraptor | Bouches-du-Rhône |
| WS Interactive | Haute-Garonne |
| WSB | Gironde |
| WSF | Calvados |
| WSHOP | |
| WSI Obiweb | |
| Wstudio | Meurthe-et-Moselle |
| Wyca | |
| Wydden | Nord |
| Wyde | Paris |
| WYLog | |
| Wynsys Groupe | |
| Wysigot | Gironde |
| Wysistat | Doubs |
| WZ-Conseil | Tarn |
| X-Line | Alpes-Maritimes |
| X-log | Paris |
| X-Rousse Lyon Informatique | Métropole de Lyon |
| XAnge | Paris |
| Xankom | Finistère |
| Xavier Robion Conseil | Yvelines |
| Xdebug | Paris |
| XDi | |
| XEFI | Métropole de Lyon |
| Xegen | |
| Xeilom | Aisne |
| Xelya | Hauts-de-Seine |
| Xenocs S.A.S. | Isère |
| Xenothera | |
| XenTech | |
| Xerox France | |
| Xerus S.A.S. | Métropole de Lyon |
| Xfly | Métropole de Lyon |
| XGI | Lozère |
| Xilabs | Paris |
| Xilan | Nord |
| Xilinus | |
| XiVO Solutions | Métropole de Lyon |