A plurality of documents are ranked. The documents are returned as the result of a query computed for each search engine of a plurality of search engines. Each document of the plurality of documents is associated with a Uniform Resource Locator (URL). The plurality of documents includes at least one document returned as a result of the query from each of the search engines. For each URL associated with a document from the plurality of documents, a frequency of the URLs is determined. Ranking the plurality of documents includes ranking them based on one or more factors, which are based on the frequency determined for each URL associated with the plurality of documents.