> Prior to today’s funding announcement, the company had taken just a $1.2 million seed round in 2014. Today, it reports 3,000 paying customers and that it has been profitable for the last several years<p>Well there is something you don't see every day.<p>I'm impressed by how far they've come. If in 2015 you told me you're starting a company that helps companies customize their API documentation, I would have marked you as a particularly shiny unicorn.