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With Amazon set to merge its massive delivery network with Whole Foods’ existing retail business, more supermarkets are beginning to realize they have to start offering food delivery to their customers.

While some chains already offer delivery in certain markets, the easiest answer may be to partner with an existing service, whether it’s a personalized shopping platform like Instacart or companies like Peapod and FreshDirect that act more like online supermarkets.

Now that Amazon is set to become a bona fide competitor, the Wall Street Journal reports that these services have been racing to make new or expanded partnerships with regional grocery chains.

Analysts believe that Amazon could eventually double Whole Foods’ 466 stores as distribution centers and cut prices to make goods more attractive to online shoppers.