If you're like our team at Drift (and over 2M other people) you spend most of your day on Slack (for better or worse). And you've probably just started seeing all of their new TV spots. But there's one thing you might not know about: how they built a four billion dollar business in four years without a sales team. This is our take on how it happened and what it means for the future of software businesses and your marketing. What do you think?