| WinCard Solutions | Bern |
| Windmill Ventures AG | |
| WinForms | Aargau |
| Wings | Zug |
| Wingtra AG | |
| Winistörfer Winformatik GmbH | Bern |
| Winsoft Informatique S.à.r.l. | Valais |
| Winterberg Group | |
| Wintool | Zurich |
| WIR Bank Genossenschaft | |
| Wiresoft AG | |
| WISeKey S.A. | Geneva |
| WISI Wilhelm Sihn AG | Aargau |
| Witty Works | Valais |
| Witty Works AG | |
| Witweb Hosting | Zurich |
| Wizlynx AG | Zurich |
| WMC IT Solutions AG | Basel-Landschaft |
| WNG AG | Vaud |
| Wöhrle Automatisierungs-Elektronik GmbH | Zurich |
| Wolf-Media | Aargau |
| Wondrous Ltd | Basel-Stadt |
| WorkDAO | |
| World Economic Forum | |
| World Health Organization | |
| World Intellectual Property Organization | |
| World Trade Institute | |
| World Trade Organization | |
| Worldsoft AG | Neuchâtel |
| WORLDWEBFORUM Beecom AG | Zurich |
| Worx Engineering GmbH | Thurgau |
| WTI AG | |
| WW Immo Informatik AG | Zurich |
| Wyden AG | |
| Xandance & Partners GmbH | |
| Xeiro AG | St. Gallen |
| Xenoht.net S.A.R.L. | Geneva |
| Xerof | |
| xFarm Technologies S.A. | |
| XIAG AG | Zurich |
| Xilva AG | |
| XLnow | Solothurn |
| XMetalReal S.A. | |
| XOR AG | Zurich |
| xorlab AG | |
| Xovis AG | Bern |
| XPLAIN | |
| Xsensio | Vaud |
| Xterio Ltd | |
| Xtreeme GmbH | Ticino |