Easy Taxi founder: 'I couldn't get a taxi... so I created an app'
21 July 2014 Last updated at 17:30 BST
Brazilian Tallis Gomes created his smartphone app Easy Taxi in 2012 after a failed attempt to hail a cab following a night out.
The firm, which enables people to order a registered cab using their smartphone, now has seven million users in 30 different countries.
He explains how he created the company and the factors that have driven its rapid expansion.