.io is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Opentracker has better usage coverage in more websites categories. Including Business & Industry, Shopping, People & Society, Internet & Telecom and 150 other categories.
.io is leading in News & Media, Arts & Entertainment, Music & Audio, Newspapers and 26 other categories.
.io is leading in most countries, including Russia, Ukraine, Nigeria, Kazakhstan and 64 other countries.
Opentracker is leading in United States, United Kingdom, India, Germany and 55 other countries.