VWO provides A/B, split and multivariate testing software.
https://visualwebsiteoptimizer.com
Analytics and Tracking · A/B Testing
Get access to data on 457,165 websites that are Visual Website Optimizer Customers. We know of 64,450 live websites using Visual Website Optimizer and an additional 392,715 sites that used Visual Website Optimizer historically and 34,358 websites in the United States.
Visual Website Optimizer websites that are also using other technologies.
Get a list of 457,165 websites using Visual Website Optimizer which includes location information, hosting data, contact details, 64,450 currently live websites and an additional 436,323 domains that redirect to sites in this list. 392,715 sites that used this technology previouslyand 34,358 websites in the United States currently using Visual Website Optimizer.
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These are sites that we think might use Visual Website Optimizer in the future because of their similarity to other sites that already do.