Segment is leading in Top 100K Sites and Top 1M Sites.
Topsy has better usage coverage in more websites categories. Including People & Society, Business & Industry, Arts & Entertainment, Health and 167 other categories.
Segment is leading in Social Network, Mobile Developers, Web Design, Sports and 15 other categories.
Topsy is leading in most countries, including Russia, Japan, Brazil, Germany and 68 other countries.
Segment is leading in United States, United Kingdom, Greece, Australia and 22 other countries.