The Funded (<a href="http:&#x2F;&#x2F;thefunded.com" rel="nofollow">http:&#x2F;&#x2F;thefunded.com</a>) is like Yelp for investors, but not sure how up-to-date or if it is used at all anymore.<p>Edited to also add AngelList to some extent. You can find out about various investors and track down previous investments to get opinions directly.