| SpiroChem AG | |
| Sportradar AG | |
| SpotMe | |
| SprITecs | |
| Squirro AG | |
| St.Galler Kantonalbank AG | St. Gallen |
| Stalicla | |
| Stallergenes Greer | |
| Stardesign | Bern |
| Stardust | |
| Starmind | Zurich |
| START Global | |
| START Summit | |
| StartAngels Network | |
| Startfeld | St. Gallen |
| Startive Ventures | Zurich |
| Startup Accelerator | Zurich |
| Startup Balkans | |
| Startup Bites | |
| Startup Board Academy | |
| Startup Campus | |
| Startup Days | |
| Startup INVEST | |
| Startup Nights | |
| Startup Weekend Switzerland | |
| Startup Zentrum Zürich GmbH | |
| Startup.ch | St. Gallen |
| StartupBlink | Zurich |
| Startups.ch | |
| startupticker.ch | |
| Startwerk.ch | |
| Startzentrum | |
| Statoo Consulting | Bern |
| Status Research & Development GmbH | Zug |
| Staub Consulting | Bern |
| Stellar Datenrettung | Zurich |
| Stiftung für technologische Innovation STI | |
| Stiftung Futur | |
| Stimit AG | |
| STMicroelectronics | Geneva |
| STOXX Ltd | |
| Stragen Pharma S.A. | |
| Strategyzer AG | Zurich |
| StrathWeb | Zurich |
| Stratpharma AG | |
| Streamline AG | Bern |
| Streamr | |
| strongSec | Zurich |
| Studerus AG | Zurich |
| Studio Hoppe GmbH | Thurgau |