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 17 other categories.

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

Geography

1 comScore ScorecardResearch is leading in most countries, including United States, Russia, Canada, United Kingdom and 156 other countries.

2 Optimizely is leading in Belize.