Optimizely - A/B testing you'll actually use.
Algolia - Algolia's Search API makes it easy to deliver a great search experience in your apps & websites. Algolia Search provides hosted full-text, numerical, faceted and geolocalized search.
BEYABLE - Real-time personalization solutions for e-commerce & lead gen websites
Dynamic Yield - Personalization & customer experience management
Enhencer - Enhencer is an auto-machine learning SAAS platform that helps e-commerce sites to predict customer behaviours and take actions accordingly
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.