C3 Metrics is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
C3 Metrics has better usage coverage in more websites categories. Including Arts & Entertainment, Travel, Accommodation & Hotels, Business & Industry and 66 other categories.
ReferLocal is leading in Newspapers.
C3 Metrics is leading in most countries, including United States, Spain, France, Russia and 18 other countries.
ReferLocal hasn't got a lead over C3 Metrics in any country.