Optimost is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Optimost has better usage coverage in more websites categories. Including Finance, People & Society, Business & Industry, Insurance and 56 other categories.
Zeta Search is leading in Business Services, Equestrian and Alternative & Natural Medicine.
Optimost is leading in most countries, including United States, United Kingdom, Canada, France and 32 other countries.
Zeta Search is leading in United Arab Emirates, Thailand and Armenia.