| Jaeggi & Tschui | Solothurn |
| Jahia Solutions Group S.A. | Geneva |
| Jaipur Robotics | |
| 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 |
| Joulia S.A. | |
| Jowamedia | Neuchâtel |
| JP Services | Neuchâtel |
| jr-design.ch GmbH | Aargau |
| Jua.ai AG | |
| Jur AG | |
| Juristiq AG | |
| Juvabis AB | |
| K-Team Corporation | Vaud |
| K-Webs GmbH | Basel-Stadt |
| K55 GmbH | Zurich |
| Kabelfernsehen Bödeli AG | Bern |
| Kadasolutions | |
| kadasolutions GmbH | |
| Kadoa | |
| Kaduu AG | |
| Kalaidos Fachhochschule | Zurich |
| Kandou Bus S.A. | |
| Kansoft GmbH | |
| Kapaw Media | |
| KAPSLY Ventures | |
| Karda Genomics | Zurich |
| Kauz Informatik Medien AG | Lucerne |
| Keel Marktideen AG | St. Gallen |
| Kelag Kuenzli Elektronik AG | Zurich |
| Keleops AG | |
| Keller & Dürr Kassensysteme AG | St. Gallen |
| Keller Electronic GmbH | St. Gallen |