SellerCenter - Store-oriented analytical tool
Skuuudle - Discover, match and monitor your eCommerce competitors.
Shopgram - A free analyzing tool for exploring top Shopify stores
Price2Spy - Price2Spy is a price monitoring, pricing analytics, and repricing tool, meant to help eCommerce professionals keep an eye on their competitors or retailers.
Analyzify - Google tag manager and analytics app for your Shopify store
Prisync - Prisync is a competitor price tracking and monitoring software for all sizes of e-commerce companies worldwide.