Tessa Clarke is CEO and founder of Olio, a food sharing app that allows people to give away food and household items - instead of throwing them away. The app was created five years ago by a team in London and has already reached 4 million users. The Olio community is so excited about it that more than 25.000 volunteers help with picking up food and 50.000 ambassador work on the expansion of the app to countries like Mexico and Singapore. 

In this interview, Tessa talks about the step by step of building Olio, from a proof of concept on WhatsApp to the latest funding round. She also explores the complexity of building a business model around free food and her plans to change the way we consume.