In terms of market share, Observer is clearly lagging behind, losing to YellowTracker in all segments.
YellowTracker has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, People & Society, News & Media and 61 other categories.
Observer is leading in Computer & Electronics, Software, Programming, Mobile Developers and 6 other categories.
YellowTracker is leading in most countries, including Netherlands, Belgium, Germany, Poland and 9 other countries.
Observer is leading in United States, Russia, Ukraine, Turkey and 3 other countries.