You're reading Entrepreneur Europe, an international franchise of Entrepreneur Media. Written by Sam Oliver, a Scottish tech entrepreneur and serial startup founder. He's the CEO of London-based OpenFi.In 2016, I founded my second software company, Lead.Pro—a tool that automated online bookings for property sale viewings in London. Estate agents, however, weren't keen on the idea. After struggling for a year and a half, my co-founder left, but I was determined to see it through. Thankfully, we p...