9. InSphero develops medical technology for drug testing.

InSphero is a Swiss medical technology startup which develops 3D microtissues for drug testing. The microtissues are used to screen drugs and check for their safety.

The company was started in 2009 and is headquartered in Schlieren, which is close to Zürich.

Total amount raised: $25 million (£16 million)

Headcount: 29