# The best Shopify upsell apps in 2026: six apps, plus Rebuy vs AfterSell vs Zipify

Shopify Bundles, Frequently Bought Together, Upcart, Rebuy, AfterSell and Zipify OCU. Where each offer appears, what each bill counts and Shopify's post-purchase rules.

By Rohin Aggarwal · 2026-10-12

The best upsell is the thing the shopper would come back for anyway. The case for the phone. The refill for the bottle. Where you show it matters less than what you offer. What the app bills you for matters more than either. Here are six apps, and three bills compared.

**Quick answer**

- **Free from Shopify:** Shopify Bundles for fixed bundles and multipacks.
- **On the product page:** Frequently Bought Together, free for three bundles.
- **Three meters:** Rebuy bills your orders, AfterSell all store orders, Zipify upsell revenue.
- **One post-purchase app per store.** Shopify allows only one at a time.
- We make Idukki. We make no upsell app.

## Where an offer can appear

**Four places to make an offer**
1. **Product page** — Bundles and frequently bought together.
2. **Cart** — A drawer with add-ons and a shipping bar.
3. **Checkout** — Offers before payment. Custom checkout needs Plus.
4. **After payment** — One-click offers before the thank-you page.
_Each app below covers one or more of these._

## Shopify's post-purchase rules

Shopify sets the rules for offers after payment. Only one post-purchase app can run per store. Offers show on Online Store orders of $0.50 or more. Shoppers paying by wallet, instalments or gift card do not see them. A shopper can accept up to three offers per checkout. App Store apps work on every plan except Starter.

| App | Where it offers | What the bill counts | Free plan or trial |
| --- | --- | --- | --- |
| Shopify Bundles | Product page | Nothing: free | Free |
| Frequently Bought Together | Product page | Monthly orders | Free for 3 manual bundles |
| Upcart | Cart drawer | Monthly store orders | 14-day trial |
| Rebuy | Cart, checkout, after payment | Monthly orders, per package | 14-day trial |
| AfterSell | After payment; checkout on Plus | All store orders, last 30 days | 30-day trial |
| Zipify OCU | Before and after payment | Upsell revenue | 30-day trial |

_From each vendor's pricing page, help docs or Shopify listing, checked 12 October 2026._

## Shopify Bundles: free fixed bundles

Shopify's own Bundles app is free on all plans. It builds fixed bundles and multipacks in your admin. A bundle holds up to 30 components and 100 variants. It does not do mix-and-match, and bundles cannot contain bundles.

## Frequently Bought Together: on the product page

Frequently Bought Together by Code Black Belt shows bundles beside the product. The free plan allows three manual bundles. Paid plans price by monthly orders, from $14.99 to $39.99 a month. Its pages give different trial lengths.

## Upcart: the cart drawer

Upcart replaces the cart with a drawer holding upsells and a free shipping bar. Plans price by monthly store orders. The listing shows $29.99 for up to 200 orders and $34.99 for up to 500. Several apps use the Upcart name, so check the developer.

## Rebuy: personalised offers across the funnel

Rebuy sells four packages: cart, search, checkout and post-purchase, and flows with A/B tests. Each package prices by your monthly orders, from $25 a month. Bundling packages cuts the price by up to 30%. Rebuy bills on a 30-day cycle from your last 30 days. It is the broadest tool here, with the most to set up.

## AfterSell: after payment

AfterSell focuses on one-click offers after payment. Its bill counts every store order in the last 30 days, upsold or not. The docs show $34.99 for up to 500 orders, rising to $149.99 for 4,000. Above that it adds $0.03 an order, capped at $799.99. Checkout customisation costs $99 more and needs Shopify Plus.

## Zipify OCU: billed by upsell revenue

Zipify OneClickUpsell runs offers before and after payment. Its bill follows the upsell revenue it brings in. Shipping and tax count in that revenue. The price starts under $10 a month and is capped at $999. Zipify's pages show different tier breaks, so check the help article.

## Rebuy vs AfterSell vs Zipify: three meters

### What each bill counts
_From each vendor's billing docs, checked 12 October 2026._

**Rebuy: Your orders, per package**
Pay for the packages you use, sized to your order count.
- ✓ Pick only the packages you need
- ✓ Bundle discounts up to 30%
- ✗ More setup than the others
- ✗ Bill grows with all orders

**AfterSell: All store orders**
Every order counts, upsold or not.
- ✓ Predictable from your order count
- ✓ A published cap
- ✗ You pay for orders with no upsell
- ✗ Checkout tools need Plus

**Zipify OCU: Upsell revenue only**
The bill rises only when offers sell.
- ✓ Low cost while you test
- ✓ Capped at $999
- ✗ Tax and shipping count as revenue
- ✗ Tier breaks differ across its pages

So a store testing its first offer pays least on Zipify. A store with steady order volume can forecast AfterSell. A store wanting cart, checkout and search together looks at Rebuy.

**Which one to try**
Q: Where should your first offer appear?
- On the product page: **Shopify Bundles** — Free fixed bundles.
  - Want suggested pairings: Frequently Bought Together
- In the cart: **Upcart** — A drawer with add-ons.
  - Want personalised picks: Rebuy cart package
- After payment: **Zipify OCU or AfterSell** — One app per store.
  - Still testing offers: Zipify bills on upsell revenue

## Where Idukki fits (ours)

We make Idukki. It runs no cart or post-purchase offers. Its galleries tag every product in a customer photo. A shopper can add the whole look from one post. For more order value tools, read [the best apps to increase order value](/blog/best-shopify-apps-to-increase-average-order-value-2026).

**The takeaway:** Test the offer before the placement. Then pick the bill that fits your stage: upsell revenue while testing, orders once steady.

### Questions store owners ask

**Q: Can I run two post-purchase upsell apps?**

A: No. Shopify lets one app handle post-purchase offers per store.

**Q: Do I need Shopify Plus for upsells?**

A: Not for post-purchase offers from App Store apps. Custom checkout offers before payment need Plus.

**Q: How does AfterSell bill?**

A: By all your store orders in the last 30 days, from $34.99 for up to 500.

**Q: How does Zipify OCU bill?**

A: By the upsell revenue it brings in, including tax and shipping, capped at $999 a month.

### Sources
- [shopify.dev: about product offers](https://shopify.dev/docs/apps/build/checkout/product-offers) — Plans and rules.
- [shopify.dev: UX for post-purchase offers](https://shopify.dev/docs/apps/build/checkout/product-offers/ux-for-post-purchase-product-offers.md) — Order eligibility.
- [Shopify Help: Shopify Bundles](https://help.shopify.com/en/manual/products/bundles/shopify-bundles) — Free app.
- [Shopify Help: bundles eligibility](https://help.shopify.com/en/manual/products/bundles/eligibility-and-considerations) — Limits.
- [Frequently Bought Together on the Shopify App Store](https://apps.shopify.com/frequently-bought-together) — Plans.
- [Upcart on the Shopify App Store](https://apps.shopify.com/upcart-cart-builder) — Plans.
- [Rebuy pricing](https://www.rebuyengine.com/pricing) — Packages.
- [Rebuy: plans and packages](https://help.rebuyengine.com/en/articles/14048809-rebuy-plans-and-packages-feature-availability-by-plan) — Features.
- [AfterSell: billing and pricing](https://docs.aftersell.com/aftersell/aftersell_billing_pricing) — Order tiers and cap.
- [Zipify: plan and billing (OCU)](https://help.zipify.com/en/articles/4571658-plan-billing-for-your-subscription-ocu) — Revenue-based tiers.

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Canonical: https://idukki.io/blog/best-shopify-upsell-apps-2026
Tags: upsell, aov, best-of, shopify-apps, rebuy, aftersell, zipify