In terms of market share, Fathom SEO is clearly lagging behind, losing to Vertical Leap in all segments.
Fathom SEO has better usage coverage in more websites categories. Including Business & Industry, Senior Health, Health, Industrial Goods & Services and 18 other categories.
Vertical Leap hasn't got a lead over Fathom SEO in any websites category.
Fathom SEO is leading in most countries, including United States and Zambia.
Vertical Leap is leading in United Kingdom.