Walmart tops US online grocery market, with 62% more customers than next nearest rival

Walmart is dominating the U.S. online grocery market, according to new research out this week from the analysts at Second Measure. The nationwide retailer today offers grocery pickup and delivery in nearly every U.S. state, and had 62% more customers in June than its next nearest rival. And no, in this case, that rival is not Amazon — it’s Instacart.

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