RetailRocket - RetailRocket offers personalization and product recommendation engine for eCommerce.
Dynamic Yield - Personalization & customer experience management
Tamber - Tamber is a recommendation engine for developers that build fast, head-scratchingly accurate hosted recommendation engines in minutes.
Nosto - Personalized shopping experiences for e-commerce businesses
Scarab Research - Scarab Research provides highly personalized recommendations for customers of e-commerce businesses.
RichRelevance - MyBuys