How Amazon's grocery delivery service compares to its competition

Like many Americans trying to juggle a personal and professional life, you’ve probably come to this realization: your time could be better spent than shopping for groceries every week.

Several grocery services, from start-ups to retail giants, have sprung up to meet this demand. But there are big differences in terms of cost, availability and selection. Choosing between the services stands to get even more complicated as Amazon integrates Whole Foods — earlier this month, it said it would start free, two-hour delivery for its Prime members from Whole Foods in four test cities. 

Here's how the most widely available compare:

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