Optimizely - A/B testing you'll actually use.
SiteGainer - SiteGainer is an A/B testing and conversion optimization platform.
Adobe Target - Adobe Target provides an intuitive user interface and an expanded personalization toolset.
invesp Pii Testing Engine - invesp Pii testing engine offers A/B testing solution for site optimization.
AB Tasty - AB Tasty is an all-inclusive platform for conversion rate optimization, personalization, customer activation, and testing.
OpenText Optimost - OpenText Optimost is a web optimization tool that helps deliver personalized customer experiences through A/B testing and multivariate testing insights.