Optimizely - A/B testing you'll actually use.
Yozio - Yozio is a mobile growth engineering company providing an advanced analytics, organic growth marketing platform for mobile marketers.
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.
Amplitude - Mobile analytics: come with questions, leave with answers
AB Tasty - AB Tasty is an all-inclusive platform for conversion rate optimization, personalization, customer activation, and testing.
adjust - adjust is a business intelligence platform for mobile app marketers, combining attribution for advertising sources with advanced analytics.