E-commerce is growing, and direct-to-consumer e-commerce is becoming a trend. Andy Katz-Mayfield is the co-founder and co-CEO of the men’s razor subscription company Harry’s, along with Jeff Raider, one of the co-founders of Warby-Parker. The shaving startup rethinks how grooming products could be sold by focusing on higher-quality razors at lower prices than its much larger competitors. The science of customer acquisition has changed with the introduction of Facebook, custom audiences and re-targeting. Andy explains that being vertically integrated has allowed them to move quickly and commit to their millions of customers. Teaming up with Target, taking on established giant Gillette, thoughts on Dollar Shave Club’s acquisition by Unilever — all this and much more.