Before it served more than one million customers, before it helped process $6 billion in remittances last year, and before it raised a $135 million round on Tuesday, Remitly was just an idea. But in 2012, Chris DeVore was ready to make a bet. The early-stage tech investor liked the founders and how they were thinking about building a business. In one of Remitly’s initial pitch meetings, the co-founders showed off their test framework. It was baked in an Excel spreadsheet that had 100 hypotheses and what results would validate or invalidate each scenario.