Mason is based in India and the U.S. and has built a commerce engine for sellers around the world to help them sell products online without paying the exorbitant “Amazon tax.”

With respect to what I’m sure are great founders at Mason, the TechCrunch article characterizes the solution as quote “Amazon Grade eCommerce”.  

They have raised $7.5 million.  Do I need to say anything else?

TechCrunch: Accel backs startup offering ‘Amazon-grade’ commerce engine to online sellers around the world