Instacart looked like a savior, now stores aren’t so sure Representational image Jaewon Kang , The Wall Street Journal Some supermarkets plan to stick with delivery service despite fees; Instacart says it lets grocers expand e-commerce without building their own infrastructure Share Via Read Full Story Grocery-delivery service Instacart Inc. once seemed like the perfect partner for supermarkets looking to break into e-commerce. After several years together, though, some grocers are starting to question the relationship. Instacart’s technology provided a ready-made solution for grocery chains that hadn’t yet created options for customers to shop online. And it became even more attractive when delivery demand ballooned with the pandemic, providing armies of on-demand shoppers to fulfill orders in-store and deliver groceries to people’s homes.