TechCrunch in London: The battle to be noticed
23 October 2014 Last updated at 13:41 BST
There has been a lot of disruption in London this week - not traffic jams, but technology disruption.
It is an annual event called "TechCrunch Disrupt" and it features ambitious entrepreneurs talking about their start-ups and their plans to conquer all.
Newsnight's David Grossman went down to investigate.