VWO provides A/B, split and multivariate testing software.
https://visualwebsiteoptimizer.com
Analytics and Tracking · A/B Testing
Get access to data on 441,072 websites Visual Website Optimizer Customers. We know of 45,234 live websites using Visual Website Optimizer and an additional 395,838 sites that used Visual Website Optimizer historically and 25,515 websites in the United States.
Visual Website Optimizer websites that are also using other technologies.
Get a list of 441,072 websites using Visual Website Optimizer which includes location information, hosting data, contact details, 45,234 currently live websites and an additional 314,141 domains that redirect to sites in this list. 395,838 sites that used this technology previouslyand 25,515 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.