Privitar has been catching the eyes of some big backers.

It has raised £4m in funding after developing a technique for anonymising sensitive user data, while preserving useful parts for analysis.

Rapid growth in Europe, Asia and the US is planned.

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.