Go beyond the basics with the Klaviyo marketing app. Klaviyo syncs Shopify data in milliseconds so every message and insight reflects what’s happening in your store right now. Unify data from 350+ integrations and boost marketing performance with campaigns, smart segmentation, and automated workflows from Klaviyo’s AI Agents. Over 117k brands use Klaviyo and Shopify to grow faster with personalized emails, SMS, WhatsApp messages, and marketing automation tools that turn browsers into buyers.

Recover lost sales and increase revenue with Back in Stock alerts sent via email and SMS. Let customers join waitlists for Out of Stock products with automatic Restock notifications. Support Notify Me widgets for Back in Stock alerts, preorder waitlists, price drop notifications, and low stock warnings - converting interested shoppers into paying customers. Customize Back in Stock alert templates to match your brand and retarget subscribers with exclusive offers to maximize conversion rates.