BuiltWith.com is a site that will tell you what technologies other websites use. In other words, it lets you see what pickaxes the gold miners are using. If you were interested in the e-commerce space, it’d be valuable to know who currently has how much market share. You can then reverse engineer why the winners are winning and losers are losing to increase your chances of success in the same space. Go to BuiltWith.com and click TOOLS in the dropdown to start exploring trends.