| IPG AG | Zurich |
| IPOR | |
| Iprotus | Zug |
| IPS.ch | Zug |
| iQone Healthcare Switzerland | |
| iRewind AG | |
| Irmos Technologies GmbH | |
| Isatel Electronic AG | Zug |
| iSD - intelligent Systems Design - Elektronikentwicklungen | Bern |
| iShop.ch | Bern |
| isi-comp Computerdienstleistung | Zurich |
| Isomet AG | Zurich |
| Isonet | Zurich |
| iSource AG | Zurich |
| ISP Solutions S.A. | Vaud |
| ispace.ch GmbH | Zurich |
| IST System-Vertrieb GmbH | Aargau |
| Istituto Dalle Molle di Studi sull'Intelligenza Artificiale | Ticino |
| IT Armour | |
| IT Factory AG | Thurgau |
| IT Recruitment GmbH | Zurich |
| IT-Sec.ch | Aargau |
| ITech Consult AG | Zug |
| Itopie Informatique | |
| iWay AG | Zurich |
| iWedia S.A. | |
| Ixact AG | Solothurn |
| j-media GmbH | St. Gallen |
| Jad System S.A. | Geneva |
| Jaeggi & Tschui | Solothurn |
| Jahia Solutions Group S.A. | Geneva |
| Jam'on Digital AG | Zurich |
| Janzz Ltd | Zurich |
| Java User Group Switzerland | Zurich |
| JAXFront | Zurich |
| JCP S.A. | Schwyz |
| Jelurida Swiss S.A. | Ticino |
| JetLock | |
| JetNet Services | Zurich |
| Jibrel | Zug |
| Jinfo S.A. | Jura |
| Jinn-Bot Robotics & Design GmbH | Aargau |
| JIYAN Informatique | Vaud |
| jobnet.ch GmbH | Zurich |
| Jobsafari | Bern |
| JobScout24.ch | Zurich |
| Joinbox GmbH | Bern |
| Joomlapolis.com | Vaud |
| jOOQ | St. Gallen |
| Jost EDV Basel | Basel-Stadt |