| Webtimal GmbH | Basel-Stadt |
| WebTrendsMedia GmbH | Basel-Landschaft |
| WeBuild Ventures | |
| Weburi.com GmbH | Zurich |
| Webway | Zurich |
| Webzenz | |
| Wecan Group S.A. | Geneva |
| WEDO S.A. | |
| Wegaw S.A. | |
| WeJob.ch | |
| WellDev Ltd | Zurich |
| Wemakeit S.A. | |
| Wendia AG | Bern |
| Werap AG | Zurich |
| Werbeagentur Zürich | |
| Werkflow GmbH | Bern |
| Werner Forrer AG | Zurich |
| Wescom GmbH | Lucerne |
| Westhive AG | |
| WEY Technology AG | Zurich |
| WG Verlag & Lizenzen AG | St. Gallen |
| WhaleAnalytica | |
| White Elephant GmbH | Zurich |
| Whitecoast Solutions AG | Aargau |
| Whitestein Technologies AG | Zug |
| why! open computing S.A. | |
| Wide Agency | |
| Wikima4 AG | Zug |
| WIN-SYS Informatic | Schwyz |
| WinBIZ | Valais |
| WinCard Solutions | Bern |
| Windmill Smart Solutions AG | |
| Windmill Ventures AG | |
| Windward Bio AG | |
| WinForms | Aargau |
| Wings | Zug |
| Wingtra AG | |
| Winistörfer Winformatik GmbH | Bern |
| Winsoft Informatique S.à.r.l. | Valais |
| Winterberg Group | |
| Wintool | Zurich |
| Wiresoft AG | |
| WISeKey S.A. | Geneva |
| WISI Wilhelm Sihn AG | Aargau |
| WISS Schulen für Wirtschaft Informatik Immobilien AG | |
| Witty Works | Valais |
| Witty Works AG | |
| Witweb Hosting | Zurich |
| Wizlynx AG | Zurich |
| WMC IT Solutions AG | Basel-Landschaft |