Product recommendation quizzes and personalization for Shopify
Paid
Free trial
Affiliate
Rebuy Engine
AI upsells and personalization across the Shopify journey
Paid
Free trial
Affiliate program
Last reviewed April 2026
Overview
What Rebuy Does
Rebuy Engine is a personalization platform for Shopify that turns shopper behavior into relevant offers at every step. Its prediction engine reads what someone has viewed and bought, then serves recommendations through widgets you place on product pages, the cart, checkout, and the thank-you page. The goal is straightforward: lift average order value with offers that actually match what the customer wants next.
Smart Cart and Checkout
The Smart Cart is the centerpiece. It combines AI-powered upsells, free-shipping progress bars, and a switch-to-subscription toggle in one slide-out cart. On Shopify Plus, checkout extensions let you drop personalized offers into the checkout flow itself, and one-click post-purchase upsells appear on the thank-you page using saved payment details, so a second purchase takes a single tap.
Merchandising Control
Rather than a black box, Rebuy lets merchants decide where widgets appear and which logic drives them: related products, recently viewed, trending, or custom rules. You can merchandise offers by hand or let behavior-based algorithms adapt in real time, which keeps the recommendations on-brand instead of generic.
Pricing and Fit
Rebuy offers a free post-purchase tier, build-your-own packages that start low and scale with monthly order volume, and a full Platform One suite for brands that want everything plus dedicated support. Pricing is tied to order volume rather than seats, and plans carry an ROI guarantee. It fits Shopify and Shopify Plus stores focused on raising AOV through upsells and cross-sells across the funnel.
Pros
- ✓Upsells and recommendations across cart, checkout, and post-purchase
- ✓Smart Cart bundles AOV levers into one polished experience
- ✓Merchants control widget placement and recommendation logic
- ✓Strong Shopify App Store ratings and an ROI guarantee
Cons
- ✕Order-volume pricing can rise quickly for high-volume stores
- ✕Best checkout features require a Shopify Plus plan
- ✕Getting the most out of it takes setup and testing time
Key features
Smart Cart
A slide-out cart with AI upsells, free-shipping progress bars, and a switch-to-subscription toggle.
Post-purchase upsells
One-click offers on the thank-you page that use saved payment details for single-tap repeat purchases.
Checkout extensions
Drops personalized offers into the Shopify Plus checkout flow itself, not just before and after it.
Prediction engine
Reads browsing and purchase behavior to serve recommendations that match what a shopper wants next.
Flexible merchandising
Lets you choose widget placement and the logic behind it, from related products to custom rules.
PDP recommendations
Adds related, trending, and recently viewed product widgets to product pages to drive discovery.
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Frequently asked questions
- It adds AI personalization, upsells, and cross-sells to Shopify stores through widgets on product pages, the cart, checkout, and post-purchase screens to raise average order value.
- No, but the checkout extensions that place offers inside the checkout flow require Shopify Plus. The Smart Cart and post-purchase upsells work on standard Shopify.
- It offers a free post-purchase tier, build-your-own packages from around $25/month, and a Platform One suite, with cost tied to monthly order volume rather than seats.
- Shopify and Shopify Plus stores focused on lifting average order value through upsells and cross-sells across the shopping journey.
Editor’s note
Rebuy is one of the more capable AOV tools on Shopify, and the Smart Cart plus post-purchase upsells cover the moments where extra revenue is easiest to capture. The merchandising control is a real plus over black-box engines, though order-volume pricing and the Plus requirement for checkout offers are worth weighing.