The best data source for retail & ecommerce leads. Period.
How are we so sure? Alternatives like Datanyze, SimilarWeb or Wappalyzer track technologies used in a site and work backwards to tell you if they are an eCommerce site. That's inaccurate.
PipeCandy's machine learning algorithms apply various techniques to figure out which is an eCommerce site and finds you contacts at a department level.
Others like Zoominfo or InsideView track ecommerce as a sub-set of retail. They are not even an alternative when it comes to outbound sales targeted at small ecommerce companies!