In terms of market share, ReferLocal is clearly lagging behind, losing to Shopzilla in all segments.
Shopzilla has better usage coverage in more websites categories. Including Shopping, Arts & Entertainment, Computer & Electronics, Business & Industry and 51 other categories.
ReferLocal is leading in Newspapers.
Shopzilla is leading in most countries, including United States, Canada, India, Malaysia and 24 other countries.
ReferLocal hasn't got a lead over Shopzilla in any country.