A dupe is a different brand's product with a similar formula to one you already like — usually at a lower price. The key word is different brand. Another product from the same brand is a line variant, not a dupe, so this tool never returns one.
Every product is scored two ways. The ingredient match compares full INCI lists, weighting each ingredient by where it appears (earlier in the list means a higher concentration) and by how rare it is — so water and glycerin count for almost nothing while retinol, niacinamide and UV filters count for a lot. The attribute match reduces each formula to what it is built to do — hydrating, brightening, exfoliating, UV protection — plus free-from flags, which catches products that reach the same result using different ingredients. The two scores are combined, and only products in the same category are compared.
Yes. It is completely free, needs no account, and has no limit on searches. Everything runs in your browser — no ingredient list you search is ever sent to a server.
Ingredient lists come from Open Beauty Facts, an open, community-maintained cosmetics database published under the ODbL licence, plus a small hand-checked set of products taken from brands' own product pages. Prices are approximate brand-level estimates used to calculate the "% cheaper" figure, not live retail prices.
Treat them as a well-informed starting point, not a guarantee. An ingredient list shows what is in a formula but not the concentration of each ingredient, so two products can share an ingredient at very different strengths. Benefits are derived from the ingredient list rather than from label claims. Always check the current ingredient list on the packaging before buying — formulas change, and regional versions of the same product often differ.
Shoppers looking to replace a product they cannot justify repurchasing, and skincare and beauty brands doing competitive formulation research — comparing their own product against what else is on the shelf at the ingredient level.
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