You can certainly start a business without a cofounder. What's hard to do, empirically, is to start one that gets really big. There are a handful of counterexamples, like Amazon, but Treehouse is not one of them yet.
We have a lot more data about what happens in startups than any individual founder does. What interest would we have in mischaracterizing it?
We have a lot more data about what happens in startups than any individual founder does. What interest would we have in mischaracterizing it?