"Early feedback has been absolutely extraordinary," said Ken McClure, Michigan consumer communications manager for Kroger.
Kroger first began testing online ordering in select stores in November 2014.
The chain also announced it will begin offering ClickList in the Richmond, Virginia, market area as early as March, reported Richmond Metro.
Other grocery competitors offering curbside pickup include Meijer, which plans to roll out the option to all 222 of its stores. Walmart began testing e-grocery options in 2015, adding it to 10 markets. For the big-box retailer, test sites reveal shoppers who use a combination of curbside pickup and in-store shopping spend more annually.
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