Enterprise tech companies usually grow by investing in a costly sales and marketing operation, suffering through long, expensive sales cycles. Eventually, if it works, their software is adopted “top down” throughout an enterprise. That approach is tried-and-true, but it’s not the one that Dropbox or Slack followed. Over the last decade, those companies and many others have pioneered a disruptive new business model that is taking over the $250 billion software-as-a-service market. It’s called Product-Led Growth (PLG).