| Intarsys (Schweiz) AG | Basel-Landschaft |
| INTEGRA Biosciences AG | |
| Integritee AG | |
| Inter-Ibex Consulting S.A. | Vaud |
| Inter-Networking AG | Zurich |
| Interactive MEDIA | Geneva |
| InterActive MediaDesign GmbH | Schaffhausen |
| InterAx Biotech AG | |
| Interconnective AG | Basel-Stadt |
| Interdiscount | Bern |
| interfaSys S.à.r.l. | Vaud |
| Interkantonale Hochschule für Heilpädagogik | Zurich |
| International Academy of Sport Science & Technology | |
| International Federation of Pharmaceutical Manufacturers & Associations | |
| International Institute for Management Development | |
| International Management Institute Switzerland Ltd | |
| International Society for Telemedicine & eHealth | Basel-Stadt |
| International Space Science Institute | Bern |
| International Standard Organization | Geneva |
| International Trade Centre | |
| International University in Geneva | Geneva |
| Internet Diffusion S.à.r.l. | Geneva |
| Internet Governance Forum | Geneva |
| Internet Services Häni | Fribourg |
| Internet-projects.com | Zurich |
| Internet.ch IT AG | Zurich |
| Internet4you.ch GmbH | Basel-Landschaft |
| Internetgalerie AG | Bern |
| internetGrafik.com | Zurich |
| Internex | Neuchâtel |
| Internezzo AG | Zug |
| Interprefy | |
| Intersim AG | Bern |
| InterTell | Lucerne |
| Interventure Sourcing AG | Zurich |
| Interworks GmbH | Aargau |
| Inthera Bioscience | |
| Invasight | |
| Inventec Informatik AG | Zurich |
| Inventx | Grisons |
| InvestGlass S.A. | |
| Investivity | |
| Inware AG | Zurich |
| Inyova AG | |
| iomedia Communication S.A. | Vaud |
| iOnctura | |
| Ionesoft GmbH | Bern |
| IoT Lab | |
| IP Exchange | Nidwalden |
| IP worldcom S.A. | Vaud |