Klaviyo is the best in class email marketing solution for eCommerce. It's powerful because it connects to your store, and you can create awesome customer segments based on past purchasing behaviors, customer preferences, and even future predictions of spending.
Shopify is a commerce platform that allows anyone to set up an online store and sell their products. It's the go-to eCommerce platform for young direct-to-consumer brands. It's ease of use and setup is what's most attractive to merchants, but also the incredibly vast Shopify app store.
Don’t lose sales when your inventory runs out. Back in Stock makes it easy for customers to sign up for a Back in Stock alert (Email or SMS Text Message). When you restock products the waiting customers are alerted instantly to bring them back to your store and complete the purchase.