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I would like to know how much it costs to develop a website like Yahoo Answers, and what the requirements are to develop such a website.

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It's free if you use StackExchange. Start a new proposal on area51.stackexchange.com and it gets through the commitment phase. – Bart Aug 9 '11 at 12:29
I totally love how SO users read "Stack Overflow" when they see "Yahoo! Answers". – Dan Abramov Aug 9 '11 at 16:34
It costs 145 currency units. – JohnFx Aug 9 '11 at 17:01

closed as not a real question by Thomas Owens♦, Falcon, JeffO, DKnight, ChrisF♦ Aug 9 '11 at 12:39

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, see the FAQ.

2 Answers

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You need to track users, questions and answers, also certain kind of reputation. But real cost depend on how complex you want your system to be. Building a simple ask and answer site with something like ruby on rails will take you a couple of hours. Scale it to be highly concurrent and so on can take you months.

So, it depends, how many users you expect to interact with (as it happens with almost all websites).

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Well, I'd kinda presume from the question that OP is interested in a site about as complex as Yahoo Answers. – Paul Aug 9 '11 at 12:29
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Download Shapado and deploy it. It is open-source, and has a lot of the same features as Stackoverflow.com.

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