It's perhaps no surprise that Berlin is being touted as Europe's Silicon Valley, with some of the hottest sites and start-ups, like Soundcloud, Amen and Spreadshirt, all in the city. It's also just played host to NEXT Berlin - Europe's leading digital technology conference - which included a track for Start-Ups to pitch to an international jury. Of 100 applicants, 12 made it through to the finals.