In terms of market share, Fathom SEO is clearly lagging behind, losing to iProspect in all segments.
iProspect has better usage coverage in more websites categories. Including Travel, Tourism, People & Society, Internet & Telecom and 15 other categories.
Fathom SEO is leading in Health, Senior Health, Industrial Goods & Services, Computer & Electronics and 10 other categories.
iProspect is leading in most countries, including India, France, Poland and Sweden.
Fathom SEO is leading in United States.