Post-purchase upsell (one-click)
Post purchase upsells that pay in one click.
Show an offer between checkout and the order confirmation page. The customer has already paid, so accepting is one click and the same payment method is charged. Zero risk to checkout conversion, pure additive AOV.
True one-click upsell
Built on Shopify's post-purchase checkout extension. Shopify Payments, PayPal and Stripe supported. No re-entering payment details.
Upsell funnels with downsells
Up to 3 post-purchase offers, each with its own downsell when declined. You design the path.
Upsell revenue attributed
Every accepted offer is tracked to its funnel, so you know exactly which product lifts AOV.
Zero checkout risk
The highest-converting moment in e-commerce.
Right after paying, the customer trusts you and the sale is already safe. A relevant one-click post purchase offer converts at 5% to 15%, many times better than any email or banner, because there is nothing to fill in and nothing to lose.
- Accepting adds the item to the existing order: one parcel, one confirmation email, no extra shipping.
- Compare-at pricing with a Save badge and optional countdown timer, within Shopify's offer guidelines.
- Mobile-first layout rendered by Shopify checkout, so it matches your store automatically.
Downsells and sequences
A decline is not the end of the upsell funnel.
Chain up to three post-purchase offers. When a customer declines, fall through to a downsell: a smaller bundle, a cheaper variant, or a complementary cross-sell. Each step has its own copy, design and discount.
- Targeting rules by product, collection, cart value or customer tag.
- Multi-product offers and quantity options.
- A/B test two versions of any offer and let the data pick.
Combine placements
Works even better together.
Most stores run all three. Each is a separate funnel with its own triggers, offers and analytics.
Merchant reviews
Rated 5.0 on the Shopify App Store
Verbatim excerpts from public Shopify reviews. Real stores, real orders.
Really good app to prompt customers to add optional parts to their cart. It saves them receiving a product and then being disappointed they didn't realise they needed to order the other bit.
This upsell app is exactly what we're looking for, fully control, especially we can select trigger products. And their team service is great as well, fast, and efficient.
I love the ease of set-up and the detailed customization! Great App!! You'll love it too.
Cart X is a good post purchase upsell app. It helped increased my AOV and easy to use. Their client support is very responsive.
Amazing app, it helped me scale really quickly with their upsells. Customer service is amazing too. Really recommend this app to anyone trying to scale.
Really helpful and gave me additional tips to help improve the performance.
How long does it take to go live?
Two to five minutes. Install from the Shopify App Store, pick the Money Machine template and a post-purchase upsell funnel goes live in a single click with offers chosen from your catalogue. Prefer full control? Set your own targeting rules, upsells, downsells and design, then publish.
How is a post purchase upsell different from a checkout upsell?
A checkout upsell appears during checkout, before payment, and can distract from completing the order. A post purchase upsell appears after payment, so the original sale is already safe. Cart X focuses on post-purchase, in-cart and thank you page offers, the three placements that add revenue without touching your checkout conversion rate.
Is Cart X built on Checkout Extensibility?
Yes. Post-purchase and thank you page offers run as Shopify checkout UI extensions, and the in-cart popup is a theme app extension. Nothing relies on checkout.liquid or injected scripts, so offers keep working after Shopify's checkout migration and when you switch themes.
Which payment gateways support one-click post purchase upsells?
Shopify Payments, PayPal Express, Stripe and most major gateways support post-purchase offers. Shopify lists the current requirements in its post-purchase documentation, and Cart X shows you in-app whether your store is eligible before you publish a funnel.
What acceptance rate should I expect from upsell offers?
Industry benchmarks put average post-purchase acceptance around 5%, with optimized offers reaching 10% to 15%. In-cart popups typically convert 4% to 6% of viewers, and thank you page offers 2% to 15% depending on relevance. Cart X's analytics show your actual rates per funnel so you can iterate.
How do I choose which products to upsell or cross-sell?
Start with items frequently bought together, accessories and consumables for the trigger product, and higher-margin products you want to move. Cart X targeting rules let you set different offers per product, collection, cart value or customer tag, and A/B test them.
How many upsell offers should I show?
One strong post-purchase offer with a downsell is the usual sweet spot. Cart X supports up to three sequential post-purchase offers, so you can test deeper upsell funnels on your best-selling products without ever looping the customer.
Start boosting AOV today.
Install Cart X from the Shopify App Store, publish your first post-purchase upsell funnel in minutes, and keep 100% of the revenue it generates. Free up to 100 orders a month.
Free plan · All features · No revenue cap · 0% commission · Billed through Shopify when you upgrade