Dan Siroker has always believed in the power of data and experimentation. A former project manager at Google and director of analytics under President Barack Obama, Siroker believes that experimentation should be one of the highest-order cultural values of an organization. To that end, Siroker co-founded Optimizely, a globally adopted software tool that enables businesses to experiment and fine-tune their businesses based on data. From product development to front-end conversions, Siroker believes that a culture of experimentation should start from the top and trickle to the bottom, fueling growth on a large scale. Otherwise, organizations that are too afraid of risk and intolerant of failure end up undermining their ability to innovate. In this interview, Siroker shares his strong belief in the power of experimentation, and how startups can use data to their advantage, now more than ever. He also shares one of the biggest lessons he's learned in his entrepreneurial career, and how he is building a 100-year legacy with his company.