My startup is actually a similar product, although we are approaching it in a very different way:<p><a href="https://projectpiglet.com/" rel="nofollow">https://projectpiglet.com/</a><p>We are also specifically targeting investing, as opposed to a more broad market (for now).<p>Piglet, tracks top news stories, identifies how domain experts feel about said news stories (as well as general topics), and provides trend, sentiment, and net promoter tracking. We just launched a very rough MVP a few days ago.<p>If you're interested, on the first of every month, we send a survey. If completed, you will receive the next month free of charge. It's free as long as you keep providing feedback.