In terms of market share, KeywordMax is clearly lagging behind, losing to WordStream in all segments.
KeywordMax has better usage coverage in more websites categories. Including People & Society, Shopping, Health, Travel and 48 other categories.
WordStream is leading in Business & Industry, Relationships & Dating, Autos & Vehicles, Construction & Maintenance and 29 other categories.
KeywordMax is leading in most countries, including United States, United Kingdom, Bulgaria, Spain and 21 other countries.
WordStream is leading in Netherlands, Canada, Australia, Belgium and 9 other countries.