| High-Tech Bridge SA | Geneva |
| HighPower GmbH | Thurgau |
| Hightec MC AG | Aargau |
| Hippo-soft GmbH | Aargau |
| Histide AG | |
| Histide AG | |
| Hitachi Energy Ltd | |
| Hitobito AG | |
| HMCARE | Geneva |
| Hochschule Luzern | Lucerne |
| Holycode | |
| Homerun Management AG | |
| Honesto AG | |
| Horizm | |
| Hortis GRC S.A. | Geneva |
| Horus Networks S.à.r.l. | Neuchâtel |
| Host Town & CCW GmbH | Zurich |
| Host4all S.a.r.l. | Vaud |
| Hostfactory | Zurich |
| Hostmax GmbH | Zurich |
| Hostpoint AG | St. Gallen |
| hostsite.ch | Bern |
| Hoststar – Multimedia Networks AG | Bern |
| Hosttech GmbH | Zurich |
| HotFeet GmbH | Zurich |
| Howag Kabel AG | Aargau |
| HP Engineering GmbH | Zurich |
| HPDesign | Aargau |
| HS-Soft AG | Schwyz |
| HST S.à.r.l. | Geneva |
| HTC High-Tech-Center AG | |
| Huber+Suhner AG | Zurich |
| Hugener Informatik GmbH | Zug |
| Human Bios International AG | Thurgau |
| Hutter Consult AG | Thurgau |
| HWZ Hochschule für Wirtschaft Zürich | Zurich |
| Hydromea S.A. | |
| Hygh AG | Zug |
| Hypo Vorarlberg in St.Gallen | |
| hystrix medical AG | |
| I-Cube Software | Vaud |
| i-intelligence GmbH | |
| I-James Technology | Valais |
| i2 group | |
| I4 Engineering GmbH | Zurich |
| iart AG | |
| Ibani S.A. | |
| IberNet S.à.r.l. | Geneva |
| IBM Research Europe - Zurich | Zurich |
| iBooster S.A. | |