Kroger and Walmart are certainly leading grocery store chains. I would argue that Amazon is also not near a monopoly. Google, Ali Express, eBay, NewEgg, Overst

Kroger and Walmart are certainly leading grocery store chains. I would argue that Amazon is also not near a monopoly. Google, Ali Express, eBay, NewEgg, Overstock, and so many direct to consumer brands and marketplaces also are healthy competition.