The Best Sites to Shop for Groceries Online In 2021Amazon. If you\\'ve already invested in an Amazon Prime membership, consider its grocery delivery services another major perk.Boxed. Boxed offers a ton of shelf-stable bulk goods, complete with a private label brand called Prince & Spring.FreshDirect. Hungryroot. Instacart. Misfits Market. Stop & Shop. Shipt. Thrive Market. Walmart Grocery.