Optimizely - A/B testing you'll actually use.
Apptimize - Mobile A/B Testing for iOS and Android. Improve Your Native App Codelessly in Real-time.
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.
AB Tasty - AB Tasty is an all-inclusive platform for conversion rate optimization, personalization, customer activation, and testing.
Chartbeat - Chartbeat shows you real-time traffic to your website and allows you to set alerts for any downtime or spikes in traffic.
BEYABLE - Real-time personalization solutions for e-commerce & lead gen websites