Clearbit - Clearbit provides Business Intelligence APIs
Optimizely - A/B testing you'll actually use.
Amobee DSP - Cross-Channel Advertising
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.
DataXu - Marketing analytics for brands and agencies.
AB Tasty - AB Tasty is an all-inclusive platform for conversion rate optimization, personalization, customer activation, and testing.