Go beyond the basics with the Klaviyo marketing app. New stores get a guided setup — sign-up form, welcome email, and abandoned-checkout flow — without leaving Shopify Admin. 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.

Create product bundles that increase AOV with bundle upsell offers, product add-ons, cross-sell recommendations, and AI-powered Frequently Bought Together. Build mix & match bundles, fixed bundles, BOGO, Buy X Get Y, free gift with purchase, and build-your-own bundles with Bundle Builder. Show upsell offers on product pages to help customers add complementary products before checkout. Use volume discounts and quantity breaks as upsell offers that turn orders into higher-value bundle purchases.

Take control of delivery issues, returns, and exchanges through a fully branded platform built to reinforce customer confidence. Manage lost, damaged, or missing orders from your dashboard while maintaining ownership of post-purchase policies. Branded tracking, self-service issue intake, and a customer-facing returns portal reduce friction and strengthen customer relationships. Each guaranteed order plants one tree and unlocks a $5 charitable donation chosen by your customer.

Inbox puts an AI-powered sales associate on your storefront. Buyers can ask questions and get help finding the right products from your catalog. When buyers sign in with Shop, your Inbox agent can personalize replies using their preferences and purchase history from across Shopify. Run Inbox with or without the agent. Inbox learns from your catalog, policies, and store content while you control its tone, style, and rules.

Use STOQ's Preorder or Notify Me button to create waitlists for out of stock products. Offer pre-order, backorder, presales with deposits or partial payment and unlock preorder revenue today. Or send back in stock when you restock via email/SMS automatically. Customize everything with 24*7 help. With STOQ, send back in stock alerts and get preorders with many features built for you - multiple locations, Klaviyo sync & back in stock emails, analytics, markets, reminder alerts & more!