I'll have to second that. There's no reason to spend months debating "should I choose language X or language Y?" Don't choose the trendy one. Choose the one you

I'll have to second that. There's no reason to spend months debating "should I choose language X or language Y?" Don't choose the trendy one. Choose the one you're proficient in, and the one that will help you ship, as shipping is what matters here. Two comments, though: * I think startups shy away from Microsoft technologies due to potential costs. Yes, there are programs such as BizSpark, etc., but learning the open source stack can go very far if you're not on infinite budget. Also, I think it's a bit easier to hire people proficient in (insert OSS technology here) in Silicon Valley. * Even if you will never use the other technologies (say, Clojure), you can benefit a great deal from learning new things. If nothing else, this will help you gain perspective into other ways people solve problems in the industry.