The cheapest way to buy groceries online is to use retailers that own their physical stock, such as or Amazon Fresh , rather than third-party delivery apps like Instacart or DoorDash, which often add markups of 24% to 33% to shelf prices. 1. Choose the Most Affordable Platforms (2025–2026)
Pricing can vary by location, but national averages consistently rank these as the most budget-friendly: cheapest way to buy groceries online