Is It Harder to Be a Co-Founder of a Startup?

It's a lot harder to be one of the founders who really cares about the mission of the company at the earliest days. Given the nature of early stage startups, they haven't found product market fit. So they might ultimately morph into something that the founder is less excited about. Having said that, if you are mostly directionally keeping it going and the way that you thought you were when you were going into it, I think that's generally good.