Klaviyo

Klaviyo is an email and SMS marketing platform built specifically for online stores. It started as a tool that connects shopping data with messaging, and today hundreds of thousands of brands worldwide rely on it. It's effectively the standard for any serious Shopify store, but it also serves a smaller shop that finally wants to start selling repeatedly to loyal customers.

It works simply: you connect Klaviyo to your store and it begins collecting in real time who viewed what, what they added to the cart, what they bought, and how much they spent. From this data it builds customer segments and triggers automated message flows. It then tracks how much revenue each email and campaign actually generated, so you see exactly what makes money.