We have developed an A/B Test Extension for Magento that essentially allows you to test two different magento stores against each other under the same domain, all under the same installation. You can test different extensions, different payment and shipping options, different navigation, different content, etc. It goes far beyond what the snippet testing platforms can do with content tests. We have many successful Magento 1 tests under our belts with our clients and are working on getting our Magento 2 version into the marketplace.
We built a custom responsive Magento website and store for Lamkin Grips - the #1 golf grips manufacturer in the world. The site uses our Advanced Abandoned Cart extension to help shoppers save their carts easily to their email address and has helped boost revenues by 6% just from recovered carts.