You don't need a job offer to do OPT. I'm on an F-1 student visa in the US, and just finished a PhD, and will be starting a company on OPT. You even qualify for

You don't need a job offer to do OPT. I'm on an F-1 student visa in the US, and just finished a PhD, and will be starting a company on OPT. You even qualify for the STEM extension (you just have to register your business on e-verify). This gives a total of 29 months of runway, which is more time than I have money for. You don't need any help from YC to do this - talk to your international student office, they process lots of OPT applications. Read the instructions on the USCIS website. They are very clear on this, you can start a company, you don't even need to incorporate to satisfy those requirements (although, this is not legal advice, talk to your international student office, and their lawyers).