I just found http://www.cloudsurfing.com/ http://www.cloudsurfing.com/ which uses crowd sourcing to build a pretty good dataset of related companies, recommenda

I just found http://www.cloudsurfing.com/ http://www.cloudsurfing.com/ which uses crowd sourcing to build a pretty good dataset of related companies, recommendations and metadata. In fact looks like their monetization strategy is to sell a premium service that lets you analyze this data faster/better.