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Compare four lists and extract values present in all four, multiple lists, only one list, or the full unique union.
About this tool
Four-list comparison is useful for quarterly exports, regional inventories, audience segments, team rosters, and multi-source reconciliation.
Each input is deduplicated before membership is calculated so repeated rows inside one source do not distort the overlap.
FAQ
No. It includes values present in two, three, or all four lists.
This release focuses on the most useful aggregate groups; exact membership combinations can be added in a later advanced view.
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