fluther_logo_1Fluther, a startup that crowdsources answers for user questions, just raised $600,000 from some of Silicon Valley’s better-known investors.

They include Netscape founder Marc Andreessen of newly-formed venture capital firm Andreessen Horowitz, Ron Conway (who has invested in dozens of start-ups in Fluther’s space), Dave McClure and Naval Ravikant. Twitter co-founder Biz Stone is also an advisor.

Although there are already many crowdsourced question-and-answer sites, including Yahoo Answers, WikiAnswers and newer variants like Hunch and Aardvark, which digs through your social network for people to answer, Fluther says it’s different because it works in real-time and finds people across its entire network to answer your question.

The site is very intuitive. You type in a question and wait for people to respond. You can see live if someone is crafting a response, and they can see your reaction in return as you type it. Fluther says questions on the site average about 14 responses.

Fluther also says it’s very sticky — about half of its returning users come back more than 26 times. If users do come back a second time, there’s a one-third chance they’ll come back more than 100 times.