Market Share by Top Websites

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

2 In terms of market share, Optimizely is clearly lagging behind, losing to comScore ScorecardResearch in all segments.

Websites Categories

1 comScore ScorecardResearch has better usage coverage in more websites categories. Including Arts & Entertainment, Games, Adult, Lifestyle and 16 other categories.

2 Optimizely is leading in Computers Electronics & Technology, Vehicles, Finance and Business & Consumer Services.

Geography

1 comScore ScorecardResearch is leading in most countries, including United States, Russia, United Kingdom, Canada and 149 other countries.

2 Optimizely is leading in Uganda, Cameroon, Zambia, Yemen and 3 other countries.