Optimatic is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Optimatic has better usage coverage in more websites categories. Including Arts & Entertainment, Games, Video Games, TV & Video and 16 other categories.
ReferLocal is leading in Business & Industry, News & Media, People & Society, Travel and 3 other categories.
Optimatic is leading in most countries, including United States, United Kingdom, Israel, Canada and 9 other countries.
ReferLocal is leading in Japan and Germany.