In terms of market share, Fathom SEO is clearly lagging behind, losing to KeywordMax in all segments.
KeywordMax has better usage coverage in more websites categories. Including Business & Industry, People & Society, Shopping, Health and 57 other categories.
Fathom SEO is leading in Senior Health, Industrial Goods & Services, Consumer Electronics, Fitness and one other category.
KeywordMax is leading in most countries, including United States, Great Britain, India, Canada and 31 other countries.
Fathom SEO is leading in Japan.