More than 10m people use this peer-to-peer marketplace to buy and sell second-hand and vintage clothing. Founded in 2012 by Simon Beckerman, 44, who is co-founder of the style magazine Pig, the Depop app also allows users to follow others and curate images of their wares. Under chief executive Maria Raga, 39, sales in 2017 hit £94.3m, including the total cost of items sold via the platform. The London business takes a 10% commission on every sale. It has raised $42.5m to date, with backers including Octopus Ventures and Balderton Capital. It opened its first bricks-and-mortar shop in Los Angeles last March, selling merchandise sourced from its users.