Top 29 E-commerce services in the U
.S. for Q3 2015
                        
                        
                            
                             Walmart - Mobile App, Groupon - Mobile App, Amazon AppStore - Mobile App, Walgreens - Mobile App, Kohls - Mobile App and others
                        
                    
                  
                
                    
                        
Summary
                        Amazon remains the undisputed e-commerce leader with 194M unique monthly users. Walmart is making a challenge, however, with more than 124M unique users for their website and app. eBay, Amazon and Walmart are the only e-commerce properties attracting at least 100M+ users a month. (Verto Analytics)