9 Best Shopify Upsell Apps to Increase Sales in 2026

Each of the nine apps below raises average order value in a different spot, at wildly different prices. I read every listing and pricing page. Then the 1-2 star reviews, which is where the trade-offs hide that the feature lists leave out. All ratings, review counts and prices come straight from the Shopify App Store at the time of writing.

1. Kaching Post Purchase Upsell

Kaching Post Purchase Upsell is a one-click post purchase app by Kaching Appz, holding a 5.0 rating across 298 reviews with the Built for Shopify badge. The offer shows up right after checkout. The customer accepts with one click, no re-entering payment details, and since the original order is already paid, nothing you show there can drag conversion down. That safety is why I tell any store picking a single upsell surface to start post purchase.

Three placements are covered: the post purchase page itself, the checkout page and the thank you page. Every paid plan includes unlimited upsell and downsell funnels, targeting rules like minimum order value and UTM tags, and styling controls to keep offers on brand. Results differ store to store, obviously. Shop Elovia reports a 45% AOV lift from a few funnels, and IntegroPet, which pairs it with Kaching Bundles, went from EUR 38 to EUR 60 AOV, documented in IntegroPet's case study.

Plans start at $4.99 per month for up to 199 orders. $7.99 covers 499 orders, $19.99 removes the cap entirely, and every tier carries a 14-day free trial, which at volume works out to a fraction of what comparable one-click funnel apps charge. Downsides exist. Styling options are tighter than some merchants want, custom HTML on the offer page is still missing, and post purchase offers cannot appear for certain payment methods like some express wallets. That last one is a Shopify platform limitation shared by every app on this list, so plan funnels around card and Shop Pay traffic.

• Best for: stores of any size that want one-click post purchase upsells without a volume tax
• Standout feature: unlimited funnels with downsells and UTM or order-value targeting on every plan
• Price verdict: cheapest serious post purchase app on the list, $19.99/mo tops it out at unlimited orders
• Watch out for: limited custom styling, and offers skip some payment methods (platform-wide limitation)

2. Upsell.com - ReConvert Upsell

Upsell.com - ReConvert Upsell is the veteran post purchase upsell app. Live since 2018, 4.8 stars across 2,802 reviews, and still the app to beat on the thank you page, where its drag-and-drop builder packs order tracking, birthday collection, social sharing and discount widgets competitors never fully matched. One-click post purchase funnels, AI product recommendations, cart drawer offers, checkout upsells on Shopify Plus and A/B testing round out the suite.

Merchants who invest time in ReConvert get a genuinely optimized order confirmation flow, and I respect that. Read the 1-2 star reviews before you install, though. Billing dominates them. Entry plans start at $4.99 per month for 50 orders or $50 of upsell revenue, after which usage fees scale with your total store orders, including orders the app never touched. Several reviewers also found third-party affiliate ads, booking.com offers and the like, sitting in their checkout flow without realizing the setting was on. Turn that off on day one if you keep it. Merchants who eventually leave tend to cite a bill that grew faster than the upsell revenue behind it.

• Best for: stores that want a fully customized thank you page plus post purchase funnels
• Standout feature: the thank you page builder, still the deepest on the market
• Price verdict: cheap entry at $4.99/mo, but usage-based fees track total store volume, so model the real cost at your order count
• Watch out for: affiliate ads in checkout unless you disable them, and billing complaints are the app's top negative theme

3. AfterSell Post Purchase Upsell

AfterSell Post Purchase Upsell is the third post purchase specialist on the list, rated 4.8 across 905 reviews and Built for Shopify. Its Smart Funnel AI decides which offer to show based on what has been converting, backed by strong analytics and A/B testing. Beyond one-click post purchase upsells and downsells it handles thank you page offers, checkout widgets for Plus stores, and the Rokt Thanks program, which pays larger US, UK, CA and AU stores for showing third-party offers after checkout.

Pricing is tiered on total monthly store orders. $34.99 per month covers up to 500 orders, climbing to $99.99 at 2,000, so a store doing 300 orders a month pays seven times Kaching Post Purchase Upsell's entry tier before its first upsell converts. Two themes repeat in the 1-2 star reviews, surprise tier jumps as stores grow and funnels not firing for some payment methods. The payment method issue is the same platform limitation from earlier. It just stings more at this price. For a high-volume store that will actually work the AI optimization and A/B tests, AfterSell earns its fee.

• Best for: stores past roughly 500 orders a month that want AI-optimized post purchase funnels
• Standout feature: Smart Funnel AI offer selection with serious A/B testing
• Price verdict: expensive entry at $34.99/mo, justified only once volume and testing discipline are there
• Watch out for: order-tier price jumps as you grow, reported billing surprises around trials and uninstalls

4. Kaching CartDrawer Cart Upsell

Kaching CartDrawer Cart Upsell is Kaching Appz's slide cart app, rated 5.0 across 1,174 reviews. Every buyer passes through the cart, which makes the drawer the highest-traffic upsell surface a store owns. The app puts three revenue mechanics inside it, an upsell carousel with frequently bought together products, add-on toggles for gift wrap and shipping protection, and progress bars for free shipping or a free gift, then layers on urgency timers, trust badges, payment icons, a discount field and full translation. Custom HTML and CSS blocks handle the edge cases. Reverse Life's review says the app covers 95% of their needs out of the box, and VeyesBeauty reported $20k+ of added revenue in a single month from cart upsells.

Against dedicated cart builders it wins on price and support. Plans start at $9.99 per month for up to 99 orders and scale with order volume. Kaching's support team answers in minutes and routinely writes theme-conflict fixes themselves, something reviewers bring up constantly. Weak points are real too. A drag-and-drop purist will find UpCart's editor more freeform, upsell discounts only apply when the product is added inside the drawer, and anyone expecting literal AI in the cart will be disappointed. It pairs tightly with Kaching Bundles and Kaching Subscriptions, which is why so many merchants end up running several Kaching apps at once.

• Best for: stores that want the cart drawer itself to make money while it holds the order
• Standout feature: upsell carousel plus toggle add-ons like shipping protection in one drawer
• Price verdict: $9.99/mo entry undercuts every dedicated cart builder on this list
• Watch out for: fewer freeform layout options than UpCart, upsell discounts apply only inside the drawer

5. Upcart - Cart Drawer Cart Upsell

Upcart - Cart Drawer Cart Upsell is the best-known cart drawer builder on Shopify, rated 4.7 across 860 reviews. Construction is its strength. The drag-and-drop editor assembles the cart from modules, takes custom styles plus your own HTML and CSS, and ships the full cart conversion kit: in-cart upsells and cross-sells, a tiered rewards bar, free gifts, buy-more-save-more offers, sticky cart button, announcements and countdown timers.

For pixel-level control of cart layout I would point you to UpCart over Kaching CartDrawer. You pay for that control. Pricing starts at $29.99 per month for stores up to 200 orders, roughly triple Kaching CartDrawer's entry tier, and it counts total store orders too. Recent 1-star reviews flag charges continuing after uninstall, a free-gift duplication bug that cost one merchant real money, and missing support for Shopify's newer Horizon themes. Test your theme on the trial before committing. Reviewers also note the upsells behave as cross-sells in practice, adding products instead of upgrading an existing line item to a bigger variant.

• Best for: merchants who want full drag-and-drop control over cart drawer layout
• Standout feature: the most flexible cart editor in this comparison
• Price verdict: $29.99/mo entry is steep for small stores when the feature overlap with cheaper carts is large
• Watch out for: Horizon theme gaps and billing-after-uninstall reports in recent reviews

6. Upsell & Cross Sell - Selleasy

Upsell & Cross Sell - Selleasy by Logbase is the budget king of pre-purchase upselling, rated 4.9 across 2,529 reviews. The product page is its home turf. Amazon-style frequently bought together bundles, product add-ons in list, grid, carousel or popup layouts, then cart, checkout, post purchase and thank you page offers layered on top. A free tier covers stores doing up to 50 total orders a month, and paid tiers run $9 to $29 per month, among the cheapest multi-surface upsell and cross sell pricing anywhere.

For a new store showing related products on product pages, Selleasy is an easy recommendation. The edges are where it wears thin. Pricing counts all store orders, so the free plan quietly turns paid as you grow, which is the most common 1-star complaint. Reviewers from the past year report widgets breaking after theme updates and bundle prices failing to refresh when a customer switches variants. One more structural note, only one discount can apply per order, a Shopify constraint the developer acknowledges. Stores built on stacked incentives should factor that in before choosing it.

• Best for: small stores that want frequently bought together and add-ons with a real free tier
• Standout feature: product page cross sell layouts, from FBT bundles to popup add-ons
• Price verdict: free to 50 orders/mo and capped at $29/mo, hard to beat on cost
• Watch out for: widget breakage after theme updates and the free tier expiring with your growth

7. One Click Upsell - Zipify OCU

One Click Upsell - Zipify OCU comes from Ezra Firestone's Zipify, carries a 4.5 rating across 503 reviews, and popularized one-click post purchase upselling on Shopify in the first place. Coverage is total: product page widget, in-cart offers, in-checkout upsells for Plus stores, one-click post purchase and thank you page offers, AI-driven dynamic offers, built-in split testing. Feature-for-feature it is the most complete single app in this comparison.

You pay an $8 per month base, then a usage fee that scales with the upsell revenue the app generates, and the listing never publishes the exact schedule. Merchants in 1-star reviews cite bills climbing past $500 a month, which in their view outweighed the incremental revenue. A percentage of upsell revenue sounds fair until you notice your best month is also your priciest, and you cannot forecast the cost from the listing alone. A smaller cluster of reviews reports checkout-level malfunctions like duplicate orders. If one app for every surface is the goal and revenue-share economics suit you, OCU is a legitimate choice.

• Best for: stores consolidating every upsell surface into one funnel builder
• Standout feature: complete surface coverage with dynamic AI offers and split testing
• Price verdict: $8/mo entry is misleading, model the revenue-share fee at your upsell volume before committing
• Watch out for: undisclosed fee schedule and scattered reports of checkout glitches

8. Rebuy Personalization Engine

Rebuy Personalization Engine is the enterprise pick, rated 4.7 across 748 reviews. Calling it an upsell app undersells it. AI product recommendations feed a Smart Cart slide-out drawer, checkout and post purchase offers, site search, collection merchandising and automated Smart Flows, with deep hooks into the stack bigger brands already run, Klaviyo, Recharge, Attentive and Okendo included. When a Plus store wants one system personalizing the whole buying journey, Rebuy is usually the honest answer.

The scope costs money. Paid plans start around $25 per month and scale with order volume across modular packages, and mid-size stores realistically land in the hundreds per month. It is also the only app here without the Built for Shopify badge. The 1-2 star reviews cluster around support that is hard to reach at this price, billing disputes including charges calculated on recurring subscription revenue, and the occasional platform update that broke checkouts. Under 1,000 orders a month, Rebuy is overkill. Past that it belongs on your shortlist.

• Best for: Plus and high-volume stores that want AI personalization across cart, checkout, search and post purchase
• Standout feature: one AI engine driving recommendations on every surface, including site search
• Price verdict: from $25/mo but realistically a three-figure monthly line item at scale
• Watch out for: support responsiveness and billing complaints, plus no Built for Shopify badge

9. Honeycomb Upsell & Cross Sell

Honeycomb Upsell & Cross Sell by Conversion Bear is the smallest app here, rated 4.6 across 146 reviews, and one thing earns its slot: a free plan with real funnel features. 100 funnel views a month at $0 covers product page, cart, post purchase and thank you page offers, with A/B split testing and AI recommendations included. A store owner searching for a free upsell app to learn how funnels behave gets the lowest-risk entry point on this list.

Outgrow the free tier and the economics flip. Paid plans jump to $54.99 per month for 2,000 funnel views and $169.99 for the 10,000-view Platinum tier, the only one with in-checkout upsells. Funnel-view pricing is harder to predict than order-based pricing since views do not equal conversions. The tiny review base cuts both ways as well. Only five 1-star reviews exist, but three describe slow support during revenue-impacting incidents, and I would not hang mission-critical checkout offers on a team that size. Treat it as a classroom, then move the surface that proved itself onto a specialist app.

• Best for: testing upsell funnels free before committing a budget
• Standout feature: A/B testing and AI offers included even on the free plan
• Price verdict: free tier is generous, paid tiers are poor value against order-priced rivals
• Watch out for: view-based pricing unpredictability and thin support coverage

Which Shopify upsell app to choose

Match the app to the surface where your store leaks the most revenue. The guide on how to upsell on Shopify walks through the ordering I recommend, post purchase first since it cannot hurt conversion, then the cart, and product page offers after that.

• You want the safest first upsell and the lowest bill: Kaching Post Purchase Upsell at $4.99/mo, one-click offers that cannot touch your checkout conversion rate.
• Your thank you page is your brand moment: ReConvert, nothing else customizes that page as deeply.
• You do 500+ orders a month and want AI picking the offers: AfterSell, the price makes sense at volume.
• You want the cart itself selling: Kaching CartDrawer for upsell carousels, toggles and progress bars at $9.99/mo, or UpCart if freeform drag-and-drop layout control matters more than price.
• You are small and pre-purchase focused: Selleasy, free up to 50 orders a month with the best product page layouts.
• One app for every surface and revenue-share pricing does not scare you: Zipify OCU.
• You run a Plus store and want whole-journey AI personalization: Rebuy.
• You want to experiment before paying anyone: Honeycomb free tier, then move up.

Whichever you pick, install it on a trial, run one offer on your best seller and check the numbers after two weeks. Keep it if the math holds at your order volume. And if the bill grew faster than the upsell revenue it produced, there are eight alternatives above.