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, Health, Senior Health, Industrial Goods & Services and 19 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 Germany.
Vertical Leap is leading in United Kingdom.