In terms of market share, Fathom SEO is clearly lagging behind, losing to WordStream in all segments.
WordStream has better usage coverage in more websites categories. Including Business & Industry, People & Society, Relationships & Dating, Autos & Vehicles and 53 other categories.
Fathom SEO is leading in Senior Health, Industrial Goods & Services, Computer Hardware, Consumer Electronics and 3 other categories.
WordStream is leading in most countries, including United States, United Kingdom, Australia, Viet Nam and 11 other countries.
Fathom SEO is leading in Germany.