10 Best Shopify Cross-Sell Apps Compared by Placement, Pairing and Price

A shopper buying the camera still needs the memory card. Whether they add it depends on where the offer appears and how well it fits. Shopify’s free complementary products only cover the product page, with pairs you pick by hand. The best Shopify cross-sell apps go further, and they differ on three things: where the cross-sell appears, how the app picks the product, and what the bill counts.

I compared 10 apps on those three questions using each app’s App Store listing and pricing page on October 28, 2026, plus every app ChatGPT, Perplexity, Gemini and Claude named for this question.

Which Shopify Cross-Sell Apps Cover The Most Placements?

Four apps on this list can cross-sell at every step from the product page to the thank-you page: OneClickUpsell, Selleasy, Candy Rack and Upsell.com (checkout offers need Shopify Plus). Frequently Bought Together, Fast Bundle and UFE stay near the product page and cart. The bigger split is the bill: five of the 10 charge on total store orders.

Every app here sells complementary products, is installable today and was named by an AI assistant or roundup.

What Do Shopify’s Free Complementary Products Do, And Where Do They Stop?

Shopify’s free Search & Discovery app lets you hand-pick up to 10 complementary products for each product and show them in a theme block near Add to cart. It’s free, but product-page only, with no discount or one-click offer.

Shopify’s own developer docs define complementary products as “products that are often bought in addition to a selected product” and recommend showing 2 to 3; out-of-stock, $0 and in-cart items are skipped. Related products are different: Shopify generates them automatically from purchase history, descriptions and collections, and they’re alternatives, not add-ons.

Native is enough for a small catalog with obvious pairs (a case for the phone). You need an app for cross-sells beyond the product page, discounted add-ons, AI pairing or data on which pairs sell.

Where Can Cross-Sells Appear On Shopify?

Cross-sells can appear in 5 places: the product page, the cart or cart drawer, checkout, the post-purchase page between payment and the thank-you page, and the thank-you or order status page. On the product page the shopper is still deciding; on the post-purchase page they’ve paid and can add one more item in a click. Shopify’s guide to cross-selling (April 2026) suggests three or fewer cart drawer recommendations, priced to close the gap to free shipping: a $15 to $20 add-on next to an $85 product with a $100 threshold.

Only checkout has a plan gate: per Shopify’s checkout extensibility docs, apps for the information, shipping and payment steps need Shopify Plus, while thank-you page apps work on Basic and up.

More placements pay off: in Zipify’s audit of $143M in upsell revenue, pre-purchase placements converted 57% better than post-purchase, and stores with 3+ placements earned 3.6x the upsell revenue of post-purchase-only stores. If the cart is your gap, see the best cart drawer upsell apps.

How Do Cross-Sell Apps Pick The Complementary Product?

Cross-sell apps pick the product in one of four ways: you choose pairs by hand, you set rules (product, collection, cart value, customer tag), AI picks from order history, or the app reads Shopify’s recommendation data. Hand-picking suits small catalogs; AI helps when there are too many products to pair yourself.

• By hand. Every app here supports it, and for a 30-product store it’s often the best pairing you’ll get.
• By rules. Rules scale judgment: “show the cleaning kit to anyone with a jacket in the cart.” Selleasy keeps its rules engine for the Max plan.
• By AI. Most apps now offer it, and brands expect that: in Twilio Segment’s State of Personalization Report 2024, 73% of brands said AI adoption will fundamentally change their personalization strategies. Shoppers notice: in Salsify’s Ecommerce Pulse Report (October 2024, 1,000+ US and UK shoppers), 37% said personalized recommendations made them buy more often. Watch the metering: Selleasy caps AI recommendations by plan (50 a month on Starter). In OCU, Dynamic AI offers pick from your store’s data on every plan.
• From Shopify’s list. Candy Rack is the only app here that lists Shopify’s product recommendations as an engine, so pairs you set in Search & Discovery carry over.

10 Best Shopify Cross-Sell Apps Compared

Each entry covers features, App Store pricing, and pros and cons with 2026 merchant reviews.

1. OneClickUpsell (OCU) — cross-sells at every step, billed on upsell revenue

OneClickUpsell (OCU) by Zipify adds cross-sells to the product page, cart drawer, checkout (Shopify Plus), post-purchase and thank-you pages in one plan. Since April 2026, shoppers can add a product page cross-sell without the main product.

Key features

• Product page cross-sells, add-ons and bundles;
• Slide Cart Drawer with up to 8 AI-powered offers;
• In-checkout offers on Shopify Plus;
• One-click post-purchase and thank-you page offers;
• Dynamic AI offers, targeting by product, cart value or customer tag;
• A/B testing.

Pricing

$9.95/month up to $200 in monthly upsell revenue, stepping up with upsell revenue to a $999/month cap, never billed on order volume. 30-day free trial (OCU pricing).

2. Selleasy — free plan with Shopify and manual recommendations

Upsell & Cross Sell — Selleasy by Logbase shows cross-sells on the product page, in the cart drawer, after purchase and on the thank-you page, plus Plus checkout offers from the Pro plan. Its free plan has no order limit. Paid plans are sized by monthly AI recommendations.

Key features

• Product page lists, grids, carousels and pop-ups;
• Cart drawer and cart pop-up offers;
• Post-purchase and thank-you page offers;
• Shopify and manual recommendations on the free plan;
• AI recommendations and a campaign optimizer on paid plans.

Pricing

Free for unlimited orders and up to 5 campaigns. Starter $9/month (50 AI recommendations), Pro $49 (1,000, plus Plus checkout offers), Max $99 (2,500, plus a rules engine). 30-day free trial.

3. Essential Upsell & Cross Sell — free plan up to $100 of added revenue

Essential Upsell & Cross Sell adds frequently-bought-together, “also like” and add-on offers to the product page and post-purchase page, and to the cart from its $19.99 plan. Like OneClickUpsell, it bills on the revenue its offers bring in rather than on store orders. It launched on the App Store in June 2024.

Key features

• Frequently bought together and related products;
• Product add-ons and buy X get Y offers;
• Post-purchase upsell discounts;
• Automatic discount promotions;
• Funnel analytics.

Pricing

Free up to $100 in added revenue a month. Starter $9.99 (up to $500), Essential $19.99 (up to $1,000, adds cart offers), Growth $39.99 (up to $2,500). 14-day free trial (pricing on the listing).

4. Frequently Bought Together — Amazon-style bundles on product pages

Frequently Bought Together CBB by Code Black Belt places a “bought together” bundle under the product with one add-to-cart button for the set. Paid plans add automatic and AI recommendations and show the widget on cart pages too. It has been on the App Store since 2017.

Key features

• Bundle widget on product and cart pages;
• AI, manual and global recommendations;
• 4 bundle discount types (percentage, fixed, free item, free shipping);
• Star ratings from review apps inside the widget;
• Analytics.

Pricing

Free for up to 3 manual bundles. Professional plans by monthly store orders: $9.99 (up to 50), $24.99 (up to 500), $39.99 (500+). 14-day free trial (pricing on the listing).

5. Upsell & Cross Sell ‑ AW — up to 8 locations, billed on clicks

Upsell & Cross Sell ‑ AW by Aheadworks shows related products in up to 8 locations, including product pages, the mini-cart, checkout, order status, thank-you and post-purchase pages. It’s the only app here that bills on recommendation clicks and on how many locations your plan includes. You pick pairs by hand or base them on sales history, collections or AI.

Key features

• Up to 8 placement locations on higher plans;
• Manual, sales-history and AI “Smart Recommendations”;
• Frequently bought together bundles;
• Quantity breaks and volume discounts;
• Click and conversion analytics.

Pricing

Free for 2 locations and 50 clicks a month. StartUp $29.99 (3 locations, 2,500 clicks), Small Store $49.99 (8 locations, 5,000 clicks), Medium Store $59.99 (custom pages, 10,000 clicks). 14-day free trial (pricing on the listing).

6. Candy Rack — can use Shopify’s own product recommendations

Candy Rack • Upsell Cross‑sell by Digismoothie shows offers on the product page, in an add-to-cart pop-up and slide cart, in checkout (Shopify Plus), after purchase and on the thank-you page. Its AI mode can pick offers with Candy Rack AI, Google Gemini or Shopify’s product recommendations. Plans include a slide cart and a 60-day money-back guarantee.

Key features

• Add-to-cart pop-up and embedded product page offers;
• Built-in slide cart drawer with a rewards bar;
• Checkout block on Shopify Plus;
• Post-purchase and thank-you page offers;
• A/B testing through Intelligems.

Pricing

By monthly online store orders: Lite $29.99 (0–50), Starter $39.99 (51–200), Growth $59.99 (201–500), with higher tiers on the vendor site. 8-day free trial (pricing on the listing).

7. Wiser — AI recommendation widgets on every page

Wiser Recommendations & Upsell adds AI widgets (frequently bought together, related, recently viewed, shop the look) to any page, plus cart, post-purchase and thank-you page offers. The advanced cart drawer and checkout recommendations sit on its Enterprise plan. Every plan bills on monthly store orders.

Key features

• AI frequently bought together and AI recommendations;
• Handpicked manual and rule-based recommendations;
• Post-purchase upsell offers on every plan;
• Revenue tracking by widget;
• A/B testing.

Pricing

Free for 0–50 monthly orders. Basic $9 (51–100), Growth $19 (101–300), Premium $49 (301–500), with larger plans on the vendor site. 14-day free trial (pricing on the listing).

8. UFE Cross Sell & Upsell Bundle — billed on all store orders

UFE Cross Sell & Upsell Bundle adds cross-sell, bundle and volume-discount offers to the product page, cart and thank-you page, in pop-up, in-page or floating styles. It includes A/B testing and works with Shopify Markets. Pricing follows total store orders, “not generated by the app,” per its own pricing page.

Key features

• Pop-up, in-page and floating offers;
• Frequently bought together bundles and volume discounts;
• AI product recommendations;
• BOGO and discounted upsells;
• A/B testing.

Pricing

Free up to 50 store orders. Usage-based above that: $9.99 (51–100), $19.99 (101–200), $29.99 (201–500), $49.99 (501–1,000), and up. 7-day free trial (UFE pricing).

9. ReConvert by Upsell.com — post-purchase and thank-you page funnels

ReConvert Post Purchase Upsell, now run by Upsell.com, builds one-click post-purchase funnels and adds offers on the product page, cart, checkout (Shopify Plus) and thank-you page. Like OneClickUpsell, it covers all 5 placements. Its listing tiers count store orders or upsell revenue.

Key features

• One-click post-purchase funnels;
• Thank-you page builder;
• AI upsells, bundles and cross-sells;
• Quantity breaks and free gifts;
• A/B testing.

Pricing

Free up to 50 orders or $50 upsell revenue. Growth plans: $9.99 (51–100), $19.99 (101–200), $39.99 (201–500); higher volumes on the vendor’s pricing page. 14-day free trial (pricing on the listing).

10. Fast Bundle — bundles billed on bundle sales

FBP | Fast Bundle Product builds frequently-bought-together, mix-and-match and add-on bundles on the product page, in pop-ups and on collections, and supports Shopify POS. Paid plans add unlimited AI frequently-bought-together and an AI bundle image generator. It bills on the sales that go through its bundles.

Key features

• AI frequently bought together on paid plans;
• Mix-and-match, BOGO and buy X get Y bundles;
• Product add-ons and free gifts;
• AI bundle image generator;
• Shopify POS support.

Pricing

Free for development stores only. Standard $19 (up to $1,000 monthly bundle sales), $49 (up to $3,000), $139 (up to $10,000). Auto Bundle Detection costs an extra $49/month. 7-day free trial (pricing on the listing).

What Do Shopify Cross-Sell Apps Charge For?

Cross-sell apps bill on four different units: your store’s total orders, the revenue their offers bring in, recommendation clicks, or a monthly quota of AI recommendations. The unit decides what your bill does in a slow month and in a BFCM month.

• Store orders (Frequently Bought Together, Candy Rack, Wiser, UFE, and Upsell.com with orders or upsell revenue) count every order, whether or not the shopper saw a cross-sell.
• Revenue the offers bring in (OneClickUpsell, Essential, Fast Bundle) counts only sales the app’s offers generate.
• Clicks (AW) count recommendation clicks plus the number of placements on your plan.
• AI quota (Selleasy) counts AI recommendations, not orders.

These models don’t compare dollar for dollar, so estimate your bill. For an order-based app, find the tier for your busiest month (usually BFCM). For a revenue-based app, multiply orders by expected take rate by add-on price: 300 orders × 10% × $20 is $600 of cross-sell revenue, which sits in OCU’s $500 to $1,000 tier at $49/month. Price-first? See the cheapest Shopify upsell apps.

Which Shopify Cross-Sell App Should You Choose?

Match the app to the placement you need, then to a billing unit you can live with. For a growing store that wants cross-sells from product page to thank-you page on one bill tied to what the offers earn, I’d start with OCU. For product page pairs only, Shopify’s free option is enough.

Use one app per placement: two apps in one cart drawer compete, and you can’t tell which one sold.

The Bottom Line

A cross-sell is worth what it adds when the shopper decides, so the best Shopify cross-sell apps reach those moments and bill sensibly. If product page pairs are all you need, start with Shopify’s free complementary products. If you want cross-sells from the product page to the thank-you page, with a bill that follows the revenue those offers bring in, OneClickUpsell is the one I’d install first. It has tracked $1.5B+ in upsell revenue across 50,000+ Shopify stores.

Frequently Asked Questions

What’s the best free cross-sell app for Shopify?

Shopify Search & Discovery is fully free, for hand-picked complementary products on product pages. For free app plans, Selleasy has no order cap (up to 5 campaigns), Wiser and UFE are free up to 50 orders a month, and Essential is free up to $100 in added revenue. OneClickUpsell has a 30-day free trial, then starts at $9.95/month.

Can I add cross-sells to Shopify checkout without Shopify Plus?

No, not inside the information, shipping and payment steps. Shopify allows apps to customize those steps only on Shopify Plus. On other plans, you can still cross-sell on the product page, in the cart drawer, on the post-purchase page and on the thank-you page.

What’s the difference between a cross-sell, an upsell and a frequently-bought-together bundle?

A cross-sell suggests a complementary product (the case with the phone). An upsell suggests a better or bigger version of what’s in the cart. A frequently-bought-together bundle groups items into one set, often with a discount. Shopify Bundles builds fixed bundles for free, and I’ve covered bundles and frequently-bought-together offers in OCU separately.

How do I know if my cross-sells are working?

Track three numbers for each placement: the take rate (the share of shoppers who add the cross-sell), average order value, and revenue per visitor. Compare them against a control for at least two weeks. Several of the best Shopify cross-sell apps above, including OCU, Wiser, UFE and Upsell.com, have A/B testing built in. A high click rate with flat revenue per visitor means the pairing needs work.