This firm’s cutting-edge positioning technologies could soon be deployed in smartphones and help prevent tens of thousands of deaths a year.

They maintain a high level of GPS accuracy in complex indoor and urban environments, which could help emergency services locate the phones of stricken patients and also assist with the navigation of autonomous vehicles.

See more of our 101 tech start-up disrupters here.

And check out our 101 rising stars of tech - the exciting firms which did not make the main list but have the potential to grow.