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.
V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
Dynamic Yield - Personalization & customer experience management
Adobe Audience Manager - Adobe Audience Manager is a data management platform that integrates online and offline data to deliver a unified view of all your audiences
Optimizely - A/B testing you'll actually use.
Clearbit - Clearbit provides Business Intelligence APIs