A domain that appears in half a keyword export has achieved half of something: coverage of that observed sample. The result becomes misleading when the denominator disappears and the ratio is presented as search market share. A useful competitive set keeps the query scope and collection limits beside every coverage claim.

SERP Competitor Overlap Analyzer processes an existing search-results batch. It produces domain assessments with observed keyword coverage, page-one rank evidence and source URLs. Collection happens upstream; the transformation organizes the sample that the team already owns.

Keep query context in the input

This example is a shortened projection of an installed public historical snapshot. It preserves the query scope and a bounded subset of its organic results for a small inspection.…