Blueshift is leading in Top 100K Sites.
Observer has better usage coverage in more websites categories. Including Business & Industry, Computer & Electronics, Arts & Entertainment, Internet & Telecom and 26 other categories.
Blueshift is leading in Shopping, Career & Education, Jobs & Employment, Search Engine and 9 other categories.
Observer is leading in most countries, including United States, Russia, United Kingdom, Brazil and 6 other countries.
Blueshift is leading in India and Sweden.