Skuuudle - Discover, match and monitor your eCommerce competitors.
Dynamic Yield - Personalization & customer experience management
Price2Spy - Price2Spy is a price monitoring, pricing analytics, and repricing tool, meant to help eCommerce professionals keep an eye on their competitors or retailers.
Optimizely - A/B testing you'll actually use.
Prisync - Prisync is a competitor price tracking and monitoring software for all sizes of e-commerce companies worldwide.
AB Tasty - AB Tasty is an all-inclusive platform for conversion rate optimization, personalization, customer activation, and testing.