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, Business & Industry, Accommodation & Hotels and 69 other categories.
ReferLocal is leading in Newspapers.
C3 Metrics is leading in most countries, including United States, Canada, Russia, United Kingdom and 26 other countries.
ReferLocal hasn't got a lead over C3 Metrics in any country.