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.
Neuronalbite - Neuronalbite is a CRO tool for ecommerce based on artificial intelligence.
Optimizely - A/B testing you'll actually use.
Referral Candy - Run a fully automated, customizable and easy to integrate referral program for ecommerce.
Dynamic Yield - Personalization & customer experience management
StartupStack - Find the startups that use your favorite tech stack