Coles vs Woolworths vs ALDI Price Comparison & API

Coles vs Woolworths vs ALDI Price Comparison & API

Give a shopping list and see which Australian supermarket is cheapest for each item: Coles, Woolworths or ALDI. Every item (full cream milk 2l, tim tam, free range eggs, bananas, toilet paper) is searched at all three chains, and each chain's cheapest matching product is compared per kg, per litre, per item or per 100 sheets, so a 3 L bottle and a 1 L bottle, or a 32-pack and a 20-pack, are compared fairly.

Each row names the cheapest chain, its product, pack price and price per unit, the price gap in %, each chain's best product with size, special and link, and the identical product at each chain (same brand and size, e.g. Arnott's Tim Tam Original 200g: Coles $6.00, Woolworths $4.50, ALDI $4.49). A basket total prices the same amount of every item at each chain: which supermarket is cheapest for your whole list, and by how much.

Add a postcode for the prices, specials and stock count of your nearest Coles store. Schedule it with Only report changes and it becomes a Coles, Woolworths and ALDI price tracker: a row only when a price changes or another chain becomes the cheapest.

Use cases: grocery price comparison apps and websites, cost of living research, own-brand vs ALDI price checks, weekly price tracking for a fixed basket. No login, no browser: a Coles, Woolworths and ALDI price comparison API that returns JSON, CSV or Excel.

What makes it different

🧺 Basket total per supermarket	The same amount of every item at each chain's best price per unit, summed: "ALDI $28.80, Coles $31.53, Woolworths $31.93" for your list, plus how many items each chain wins
⚖️ One measure for all three chains	Price per kg / L / each / 100 sheets from each chain's own unit price, so pack sizes don't fool the comparison
🔁 The identical product side by side	Same brand and size at two or three chains (Tim Tam, a2 Milk, Sorbent) with the saving in $
🍌 Smart matching	bananas compares fresh bananas, not banana chips; full cream milk 2l keeps only 2 L bottles; nappies size 4 skips size 2
📍 Your Coles store	Postcode or suburb in: that store's prices, specials and exact units in stock
🔔 Price tracker	price_drop, price_rise, cheapest_chain_changed with what changed ("Woolworths $9.99 -> $8.00"); unchanged items are free

Example

Shopping list full cream milk 2l, tim tam, free range eggs, bananas, toilet paper (the input form's example). Real run, 15 Oct 2026, Coles online prices:

Item	Cheapest	Coles	Woolworths	ALDI
full cream milk 2l	ALDI $3.39	$3.40 ($1.70 / L)	$3.40 ($1.70 / L)	$3.39 ($1.70 / L)
tim tam	ALDI $5.99 (365g)	$6.40 365g, was $8 ($17.50 / kg)	$8.00 365g ($21.90 / kg)	$5.99 365g ($16.40 / kg)
free range eggs	ALDI $6.19 (700g)	$7.50 800g ($9.40 / kg)	$6.70 700g ($9.60 / kg)	$6.19 700g ($8.80 / kg)
bananas	ALDI $4.49 / kg	$4.90 / kg	$0.88 each (not compared)	$4.49 / kg
toilet paper	ALDI $13.49 (32 pack)	$4.00 4 pack ($0.26 / 100 sheets)	$8.50 20 pack ($0.24 / 100 sheets)	$13.49 32 pack ($0.23 / 100 sheets)

Basket (the same amount of the 4 items all three sell by the same measure): ALDI $28.80, Coles $31.53, Woolworths $31.93. Same product: Arnott's Tim Tam Original 200g at Coles $6.00, Woolworths $4.50, ALDI $4.49. 5 items in 24 seconds.

Input

Field	What it does
Shopping list	One item per line, like a supermarket search: milk, full cream milk 2l, tim tam, free range eggs, nappies size 4. A size (2l, 200g, 24 pack) keeps only that size
Supermarkets	Coles, Woolworths, ALDI (all three by default)
Output	comparison: one row per item + basket total; products: every matching product of every chain with a comparable price per unit
Postcode or suburb (Coles store)	e.g. 2000, Bondi Junction: prices, specials and stock of the nearest Coles; empty = Coles online prices
Products checked per item and chain	36 by default (most relevant first), up to 200
Only report changes, Monitor name	Price tracker for scheduled runs

Output

Comparison (one row per item):

Field	Example
item, comparedPer	tim tam, kg
cheapestChain, cheapestProduct, cheapestPrice, cheapestUnitPrice, cheapestUrl	ALDI, Arnott's Tim Tam Value Pack 365g, 5.99, 16.4, aldi.com.au link
priceGapPercent, chainsCompared	25 (the best price per unit at the dearest chain vs the cheapest), 3
colesProduct, colesPrice, colesSize, colesUnitPrice, colesPer, colesSpecial, colesInStock, colesUrl, colesMatches	Arnott's Tim Tam Original Chocolate Biscuit Large Pack, 6.4, 365g, 17.5, kg, was $8.00, true, link, 12
woolworths…, aldi…	the same for Woolworths and ALDI (aldiSpecial = Special Buy)
colesStore, colesStockQuantity	Coles Central Wynyard Express, 16 (with a postcode)
sameProduct, sameProductSize, sameProductColesPrice, sameProductWoolworthsPrice, sameProductAldiPrice, sameProductCheapestChain, sameProductSaving	Arnott's Tim Tam Original Chocolate Biscuits 200g, 200g, 6, 4.5, 4.49, ALDI, 1.51
change, changes, previousCheapestChain	price_drop, Woolworths $9.99 -> $8.00, ALDI (monitoring)

Basket (record BASKET in the run's key-value store, link in the Output tab): basketTotals per chain, cheapestBasketChain, basketSaving, itemsCheapestAt per chain and lines (the amount and cost of each item at each chain).

Products (output products): item, chainName, name, brand, size, price, wasPrice, isOnSpecial, promotion, unitPriceText (as the chain shows it), comparablePrice + comparablePer (one measure), isCheapestAtChain, inStock, stockQuantity (Coles store), barcode (Woolworths), category, url, imageUrl.

Pricing

Pay per event: $0.001 per run, $0.00249 per compared item ($2.49 per 1 000) and $0.00049 per product row in the products output ($0.49 per 1 000). Apify Scale plan: $2.241 / $0.441 per 1 000, Business plan and above: $1.992 / $0.392 per 1 000. The basket total is free.

Example	Cost
A 20-item shopping list compared at the three chains	~$0.051
Weekly price tracker of 50 items, 10 changes a week	~$0.026 a week
Every matching product for 10 items (~600 rows)	~$0.30

FAQ

Which is cheaper, Coles, Woolworths or ALDI? Put your own shopping list in and read the BASKET record: it prices the same amount of every item at each chain's best price per unit. In our test lists ALDI usually wins on staples, while Coles and Woolworths specials (half price) often beat ALDI on branded products.

How are products matched? Each item is searched at each chain; a product counts when its name has every word of the item (and the size, if you gave one). Each chain's cheapest product per kg / L / each is compared. Be specific for a like-for-like answer: full cream milk 2l rather than milk (which also matches soy and oat milk).

What is "Same product"? The identical product sold by two or three chains: same brand, same size and mostly the same name. House brands (Coles, Woolworths, ALDI's Farmdale) never match each other, so they are compared per unit instead.

Why is a chain "not compared" for an item? When a chain sells the item by another measure (Woolworths sells bananas each, Coles and ALDI per kg), its best price is shown in its own measure and left out of the cheapest-chain decision and the basket.

Are ALDI prices store-specific? No: ALDI and Woolworths online prices are the same nationally. Coles prices can differ by store (Darwin, regional stores): add your postcode for your store's prices.

Is there a Coles, Woolworths and ALDI price API? The three supermarket websites run on JSON endpoints, and this Actor calls them for you and returns one clean row shape for all three chains, so you get a ready grocery price comparison API without keys or setup. Call it from your code with the Apify API, or schedule it and download CSV / Excel.

Can I track price changes? Yes: turn on Only report changes, save it as a task and schedule it daily or weekly. Connect email, Slack or Google Sheets in Integrations.

Tips

• Write items as you would search a supermarket site. Add a size (2l, 500g) for an exact like-for-like comparison.
• products output shows the working: every matched product with its comparable price and which one was each chain's pick.
• Use a separate Monitor name for each scheduled task.

Limits

• Coles, Woolworths and ALDI Australia only (IGA, Costco and Harris Farm are not included).
• ALDI sells in store only: its prices are its listed prices, without stock; Special Buys are included only once on sale.
• Woolworths prices are its online prices (the store cannot be chosen without a login).

Other Australian supermarket tools

Actor	What it does
Coles Stock Checker & API	Exact stock count, prices and specials at every Coles store near a postcode, the whole specials catalogue, restock alerts
Woolworths Scraper & API	Woolworths Australia prices, specials, half price and multibuy deals, stock, barcodes and nutrition
ALDI Stock Checker & API	ALDI Australia Special Buys stock at every store near a postcode, prices and Special Buys dates

For AI agents and API

{
    "items": ["full cream milk 2l", "tim tam", "free range eggs", "bananas", "toilet paper"],
    "chains": ["coles", "woolworths", "aldi"],
    "output": "comparison",
    "postcode": "2000",
    "onlyChanges": false
}

Each row is one item with cheapestChain, cheapestUnitPrice, comparedPer, each chain's …Price and …UnitPrice, and the identical product's prices; the basket total is in the BASKET record.