.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, Arts & Entertainment, People & Society and 155 other categories.
.io is leading in News & Media, Music & Audio, Newspapers, TV & Video and 24 other categories.
.io is leading in most countries, including Russia, Ukraine, Nigeria, Kazakhstan and 67 other countries.
Opentracker is leading in United States, United Kingdom, India, Germany and 57 other countries.