This is an issue I'm dealing with in relation to a possible YC application.<p>My assumption has been that the best co-founder is one you have some history with so you know that you're compatible for the long term.<p>Is it realistic to expect that you can find a person and accurately make that assessment in six months? Particularly if it's from a different mindset (e.g. sales/bizdev cf. tech) and/or location. Are there any successful examples from YC?<p>FWIW my concept is embedded hardware-based, in a toy/education market, I have technical experience and am looking for someone with financial, business development, marketing and sales experience &#38; knowledge.