There's a lot of fantastic advice here from people much more experienced than me, but I will just say having done a couple startups myself and continuing to be

There's a lot of fantastic advice here from people much more experienced than me, but I will just say having done a couple startups myself and continuing to be in the startup "industry" as well that they're all right... So to echo all of them in summary: 1.) Stay for the equity and for the experience of watching a truly growing startup grow - most startups never grow in any significant way, they just die 2.) If you're burned out now after 8 hour days, wait until you're doing 14 hour days to survive with your startup... if you can't find the energy to do it at night (or your social life is more important to you), you're possibly not cut out for running your own startup 3.) Startups are much much more than coding (unfortunately) With all of that said I wish you the best of luck as I also left my first job out of college (Edit: realized this is not necessarily your first job out of college (or that you went to college) but leaving this here none the less) after less than a year to pursue other things (in my case a masters program) and I understand how the first job is not necessarily the right job.