Market Share by Top Websites

1 Optimizely is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 Despite its recent growth, Gemius is still behind Optimizely in all market share segments.

Websites Categories

1 Optimizely has better usage coverage in more websites categories. Including Games, Computers Electronics & Technology, Arts & Entertainment, Finance and 15 other categories.

2 Gemius is leading in Vehicles, News & Media, E-commerce & Shopping, Reference Materials and one other category.


1 Optimizely is leading in most countries, including United States, United Kingdom, Canada, Germany and 143 other countries.

2 Gemius is leading in Poland, Hungary, Czech Republic, Slovakia and 10 other countries.