Walmart Plus, Instacart, and your local grocery store have more competition now that Amazon is delivering perishable groceries in more places, with free delivery for Prime subscribers on orders of $25 or more.

The online retail giant plans to expand the service to 2,300 U.S. locations by year’s end in its quest to compete with Walmart.

Amazon is expanding its same-day grocery delivery service to 1,000 cities and towns across the U.S., the company said Wednesday. It's also introducing thousands of perishable grocery items to its offerings,