Klaviyo

Klaviyo is an email and SMS platform built around store data. It syncs customers, orders and browsing events from your store, so you can send messages based on what someone did: an abandoned cart, a first order, a product viewed but not bought, or a long gap since the last purchase.

Most stores start with a handful of automated flows, such as welcome, abandoned checkout and post-purchase, then add campaigns to segments. AI features help draft subject lines and messages and suggest when to send.

Pricing grows with the number of contacts and messages, so list hygiene matters: remove people who never open, and get clear consent before you send texts, since SMS rules are stricter than email rules. Its reporting ties revenue to each flow and campaign, which makes it easier to see which messages earn their place.