Best upsell app for Shopify

US Shopify stores lose upsell money in a predictable place: they buy a famous app, turn on six widgets, and never look at which slot a shopper actually sees. The slot is the product page, the cart drawer, the checkout steps, the page after payment, or the thank-you page. One app can cover several. Two apps on the same slot fight.

Best upsell app for Shopify, by slot

Foxr for the cart slot

If the product page is already fine and checkout is untouched, the cart is the first upsell that pays. Foxr Cart Drawer & Upsells lists cart upsells and cross-sells with discounts, buy-more-save-more, a free gift, a free-shipping bar, tiered rewards, a discount code field, and a sticky add-to-cart bar. The price on the listing is Free. It launched October 22, 2026. The full drawer breakdown, including what it does not claim, is in the cart drawer guide.

Use one offer in that drawer. A $18 accessory with the variant already chosen will beat a carousel of twelve. The discount has to be a Shopify automatic discount, so the checkout total matches the number the shopper just accepted.

Oxify when the upsell has to follow the shopper

Oxify Cart Drawer & Upsell is the upsell app to install when you want more than the drawer. The same plans, from $9.99 a month for up to 100 store orders, list checkout upsell blocks, post-purchase upsells, and thank-you page upsells next to the cart offers and free gift. It is Built for Shopify, rated 4.9 from 44 reviews, and launched January 12, 2024. The $19.99, $29.99, and $49.99 tiers cover 101–200, 201–500, and 501–1,000 monthly store orders. A 14-day trial is on the listing.

Two Shopify rules decide whether that extra coverage shows up on a US store. Checkout UI extensions on the information, shipping, and payment steps are Plus-only, per Shopify's product-offer docs. Post-purchase offers work on standard plans, and only one app can own that page. Shop Pay, Apple Pay, Google Pay, Klarna, Affirm, Afterpay, and gift cards do not surface the post-purchase page. If wallets are a large share of your US checkouts, the cart offer will be seen more often than the after-payment offer. Read the post-purchase guide before you buy a second app for that page.

Oxify Quantity Breaks when the upsell is a set

A quantity break is an upsell. So is BOGO, a fixed kit, and a box the shopper builds. Oxify Quantity Breaks & BYOB lists all of those: quantity breaks, volume discounts, BOGO, Buy X Get Y, free gifts that auto-add, mix-and-match, multipacks, and a build-your-own-box builder. Discounts auto-apply at checkout with no code. The listing says it works with cart drawer apps, including Oxify Cart, Upcart, and AOV.ai, and with GemPages, PageFly, and EComposer.

The headline calls it a free bundles app. The plan displayed on November 9, 2026 is Black Friday 2026 at $1 a month, with unlimited bundle deals, mix-and-match, the bundle builder, analytics, quantity breaks, volume discounts, upsell offers, and free gifts. A $1 plan with a holiday name can expire. Confirm the price in your admin before you put it in a budget. The app is Built for Shopify, rated 4.9 from 13 reviews, and launched July 30, 2025. A US merchant, Snuggle and Hush, wrote on August 25, 2026 that the builder had the features they wanted and that support helped them design it.

Foxr Bundle Builder when the shopper builds the box

Foxr Bundle Builder is the free upsell when the offer is a mix-and-match box, not a checkbox under the add-to-cart button. The listing, launched September 24, 2026, is priced Free and rated 5.0 from 4 reviews. Shoppers get a landing page or a builder on the product page, tiered percent-off, amount-off, or set-total discounts, a progress bar, a bonus gift, an add-on step, gift notes, and gift packaging. Rules can use quantity, spend, and compatibility. Funnel analytics and A/B testing are on the listing. The language is English.

Pair it with a cart drawer only after the box itself converts. A builder and a drawer and a post-purchase app on day one is three lessons at once. You will not know which one moved the order. The bundle comparison is in the FBT apps guide.

What the long-running upsell apps are for

AfterSell, from Rokt, is the dedicated post-purchase name. On November 9, 2026 the listing showed 4.9 from 1,121 reviews, a free plan, a $34.99 plan with one-click post-purchase offers, checkout upsells, thank-you offers, and multivariate testing, and a $59.99 plan that adds an AI cart. The listing text says checkout widgets such as upsells are for Shopify Plus, and it mentions Rokt Thanks at up to $0.80 per order for showing another brand's offer.

UpsellPlus listed a 5.0 from 151 reviews, a $49 Launch plan capped at $500 of app-generated revenue, and a $119 Shopify Plus plan capped at $2,000 of upsell revenue that adds checkout upsells. Wiz: Checkout Upsell listed 4.9 from 59 reviews, a $49 plan that says it is not for Plus, and a $99 Plus Growth plan with checkout upsells. Zipify OneClickUpsell and ReConvert (Upsell.com) dominate older roundups. Read their live meters before you compare a blog's price to the bill you will sign.

Choose those apps when you need a large review base on one slot and you will pay their meter. Choose Foxr and Oxify when the slot map above matches the catalog and the monthly fee has to stay small. A 1,121-review app is evidence of survival. It is not evidence that its offer will fit your margin.

A US upsell that survives checkout

1. 01Name the slot. Product set, cart, Plus checkout, or after payment. Fill one.
2. 02Pick a product with contribution margin you can discount. A 15% gift on a 20% margin product is a loss. The worksheet for that math is ROAS vs POAS.
3. 03Make the discount a Shopify discount, so Shop Pay and the regular checkout show the same price.
4. 04Keep a single post-purchase app. Shopify allows one. If Oxify owns it, do not also turn on AfterSell.
5. 05Read the result in items per order and contribution, not in the app's highlighted revenue, which often ignores returns and the discount you gave.

Paid traffic makes a slow upsell expensive. If the widget pushes the add-to-cart button down on mobile, you are paying for the visit twice: once in the ad account, and again in the lost add. Conversion work on the product page beats a fifth upsell widget.

Which upsell app to install this week

Install Foxr Cart Drawer if the cart is empty of offers and you want a free test. Install Oxify Cart Drawer if you want that cart plus post-purchase and, on Plus, checkout blocks, from $9.99. Install Oxify Quantity Breaks if the catalog sells in sets and you will confirm the $1 Black Friday plan. Install Foxr Bundle Builder if shoppers should assemble a box and the app has to stay free. Leave the other slots off until the first one has a take rate you have seen in your own orders.