Price comparison
Amazon Groceries vs Costco: Which Supermarket Is Cheaper?
Side-by-side grocery price comparison between Amazon Groceries and Costco in Australia. Prices are tracked daily across thousands of products so you can see at a glance which supermarket wins on the categories you buy most.
Quick Comparison
Amazon Groceries products tracked
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Costco products tracked
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Head-to-head products
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Cheapest by Category
Not enough head-to-head pricing data yet to call a winner. Check back soon — fresh prices land daily.
Want the full picture?
Browse every grocery product OpenOrder tracks across Australia supermarkets — with live unit-price comparisons.
Prices updated daily. Last updated Jun 19, 2026.