I don't know the figures for the US, but in the UK roughly 10% of developers are female. So it's not surprising that a startup with 9 developers might have no f

I don't know the figures for the US, but in the UK roughly 10% of developers are female. So it's not surprising that a startup with 9 developers might have no female developers. There might be an issue due to hiring methods (i.e. recruiting through venues that are male dominated, adverts being tailored to males, etc.), but the overwhelming reason is likely to be the lack of female devs across the industry.