SendOwl is leading in Top 100K Sites and Top 1M Sites.
SendOwl has better usage coverage in more websites categories. Including Arts & Entertainment, Business & Industry, People & Society, Internet & Telecom and 103 other categories.
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Zombaio is leading in most countries, including Italy, India, Russia, Argentina and 43 other countries.
SendOwl is leading in United States, Spain, Germany, United Kingdom and 32 other countries.