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, Business & Industry, People & Society and 55 other categories.
ReferLocal hasn't got a lead over Shopzilla in any websites category.
Shopzilla is leading in most countries, including United States, Canada, India, Australia and 26 other countries.
ReferLocal is leading in Bulgaria.