Upselling is one of the most effective ways to grow your Shopify store's revenue without increasing your ad spend, but only if you pick the right app. The problem is that every upsell app on the Shopify App Store claims to be the best, which makes narrowing down the options genuinely difficult.

That is why we went through and tested the most popular upsell apps ourselves, so you can choose the one that actually fits your store rather than guessing.

And a quick note before we dive in; upsell apps work best when you already have products that naturally complement each other. The app surfaces the offer, but the quality of your product selection and offer logic determines whether customers take it.

We only recommend apps we genuinely evaluated. No app paid for placement, all rankings are based purely on our testing.

Testing The Apps

Fairly testing upsell apps is tricky because the real measure of success, uplift in Average Order Value,  requires months of live store data across different product categories. Since we can't run every app simultaneously on a fully operational store, we focused on three things that we could evaluate thoroughly and consistently across every app:

• The features on offer: placement options, offer types, customization, and any AI capabilities
• The pricing structure: how generous the free plan is and whether paid tiers represent good value
• The experience of using the app: how quickly you can go from install to live offer

We also cross-referenced our own assessment against hundreds of real merchant reviews on the Shopify APP Store, paying particular attention to recurring complaints and genuine praise. Only the apps we would actually use on our own store made this list.

1. Essential Upsell & Cross Sell, Free to $39.99/month

Essential Upsell & Cross Sell is the most popular app on this list and after spending time with it, that popularity makes complete sense. What sets it apart from the other options is not any single standout feature, it is the combination of breadth, polish, and accessibility. You get a genuinely well-rounded upsell toolkit and you can have your first offer live in under five minutes.

The app covers all three of the main upsell placement opportunities in a single install, which means you are not stitching together multiple apps to cover the full buyer journey. The options it gives you include:

• Product page upsells and cross-sells surface relevant add-ons directly on the product page before the customer even reaches the cart
• Post-purchase one-click upsells present an offer immediately after checkout, when the customer's buying intent is at its highest
• Cart page upsells available on the Essential plan and above, this placement catches customers right before they complete their order
• Frequently Bought Together widgets the Amazon-style bundle suggestion that nudges customers to add related products
• Percentage and fixed-price discounts add a discount to any offer to make it harder to say no
• In-app revenue analytics see exactly how much additional revenue each individual offer is generating

One thing we genuinely appreciated is that the app does not gate every useful feature behind the most expensive plan. On the free and starter tiers, you still get access to the core placement options and full customization, the only meaningful restriction is a cap on how much additional revenue the app can generate per month before you need to upgrade. Here is how the pricing breaks down:

For a store just getting started with upsells, the free plan gives you enough to test the concept and see real results before committing to a paid tier. And for growing stores, the pricing scales in a way that is directly tied to the revenue the app is helping you generate, which feels fair. We do understand why Essential Upsell holds a 5-star rating; it is simply one of the best built and most complete upsell apps available on the Shopify App Store right now.

2. BOGOS: Free Gift Bundle Upsell, Free to $109.99/month

BOGOS takes a different angle to upselling compared to the other apps on this list. Rather than a general-purpose upsell toolkit, it specialises entirely in gift-based and BOGO (Buy One Get One) promotions and within that niche it is genuinely excellent. If your store runs seasonal campaigns, spend-threshold offers, or any kind of gift-with-purchase mechanic, BOGOS is built precisely for that use case.

Setting up a campaign is straightforward and most merchants should be able to get their first promotion live in under ten minutes. The rule builder is where the app really shines, you can layer multiple conditions together to create quite sophisticated offers without needing any technical knowledge. The features include:

• BOGO offers the classic buy-one-get-one format, which remains one of the most reliable ways to increase units per transaction
• Free gift with purchase rules set triggers based on cart value, specific products, or collections
• Spend-threshold campaigns encourage customers to push their order above a target value to unlock a free item
• Auto-add to cart the qualifying gift is added to the cart automatically, reducing friction for the customer
• In-cart and popup gift display visual reminders that show customers how close they are to unlocking their free gift
• Advanced rule builder combine multiple conditions for more layered and targeted promotional logic

It is worth noting that BOGOS is not a replacement for a general upsell app, if you need product-page cross-sells or post-purchase upsells outside of a promotional context, you will want to pair it with another tool. But for what it is designed to do, it is the best option we tested. Here is the pricing:

The free plan is a reasonable starting point for stores that want to test a single promotion before committing, though most merchants running active campaigns will quickly find themselves needing the Basic plan or above. BOGOS is particularly well-suited to fashion, beauty, and lifestyle stores where gift promotions and limited-time offers are a core part of the marketing calendar.

3. Kaching Bundles App & Upsells, Free to $59.99/month

Kaching Bundles approaches AOV growth from a product-bundling angle. If your strategy is to sell complementary products together at a slight discount rather than showing a pop-up upsell after checkout, Kaching is the most polished and purpose-built tool we came across for doing that. The bundle builder UI is genuinely one of the best designed interfaces we tested across all five apps, and getting a bundle live on a product page felt fast and intuitive.

The app integrates natively with your Shopify theme, so bundles appear as part of the page rather than as a bolt-on widget. The features that stood out to us included:

• Product bundle builder create bundles from any combination of products in your catalog with a straightforward visual editor
• Volume discount tiers give customers an increasing discount for buying more units, such as 10% off for two or 20% off for three
• Frequently Bought Together display Amazon-style product suggestions directly on the product page
• Mix-and-match bundles let customers build their own bundle from a curated product selection, which works well for stores with variants
• Native theme integration bundles render as part of the product page without adding noticeable page weight
• Bundle analytics and revenue tracking see which bundle combinations are performing and how much incremental revenue they are generating

Kaching does not offer post-purchase upsells, so it is genuinely a bundling specialist rather than a full upsell suite. But if product bundling is your primary AOV strategy, particularly for stores selling skincare sets, clothing, or tech accessories, it is hard to beat. The pricing is structured around the additional revenue the app generates for your store:

The revenue-based pricing model means your cost scales with the value the app is delivering, which is a sensible structure. For stores in early growth mode, the Starter plan at $14.99 gives you meaningful access to the core features and room to generate real additional revenue before needing to move up a tier.

4. SMART Checkout Rules & Upsells, Free

SMART Checkout occupies a placement that most upsell apps cannot access at all the checkout page itself. This is arguably the highest-intent moment in the entire buyer journey; the customer has already decided to buy and has their payment details ready. Placing an upsell here, when purchase intent is at its peak, tends to convert at a meaningfully higher rate than earlier placements, and SMART Checkout is built specifically to take advantage of that.

The app is free to install, which makes it an unusually low-risk option for testing checkout-stage upsells. In terms of what the app actually lets you do:

• Checkout page upsell widgets show relevant product offers directly on the checkout page, where customers are most committed to buying
• Free shipping progress bar display a visual bar showing how close the customer is to qualifying for free shipping, encouraging them to add another item
• Custom checkout rules and logic control which offers appear based on cart contents, order value, or customer tags, so you are always showing the most relevant offer
• Order bump offers one-click add-on products that sit neatly within the checkout flow without disrupting the purchase
• Post-purchase offers extend the upsell window with a one-click offer immediately after the order is confirmed
• A/B testing run split tests on different offers to identify which ones generate the best conversion rate

SMART Checkout works best for stores selling higher-ticket items where a well-placed complementary offer an extended warranty, a protective case, a matching accessory so it can meaningfully increase revenue per transaction. It is worth being realistic that the checkout page upsell experience requires some thought to set up well; the feature is powerful but will need to be configured carefully to avoid feeling intrusive to customers. For stores that get this right, it can be one of the highest-ROI upsell placements available, and the fact that it is currently free to install makes it genuinely worth trying.

5. AOV.ai Bundles Upsell, Free

AOV.ai is one of the newer apps on this list and takes a notably different approach to the others: rather than asking you to manually configure upsell rules for each product, it uses AI to figure out which combinations are most likely to convert and serves those recommendations automatically. For stores with a large product catalog, this distinction matters enormously setting up individual upsell rules for hundreds of products is not a realistic task, but the AI handles it without any manual intervention.

The app learns from your store's real purchase data over time, which means performance tends to improve the longer it runs. What it offers includes:

• AI-powered product recommendations the engine automatically identifies which products are most frequently bought together and surfaces those as upsell offers
• Smart bundle creation AI builds bundle suggestions based on actual purchase patterns rather than manual guesswork
• Cart and product page widgets upsell placements across both pre-purchase touchpoints with no manual rule-building required
• Post-purchase AI upsells AI-selected offers presented immediately after the order is confirmed
• AOV analytics dashboard clear reporting on the impact the app is having on your store's average order value over time
• Large catalog optimization the more products and order history you have, the better the recommendations become

There is one important caveat: the AI needs order history to learn from, which means brand-new stores or stores with very few monthly orders will not see the same quality of recommendations as an established store. If your store is processing a reasonable volume of orders and has 50 or more products, AOV.ai is a genuinely compelling option especially given that it is currently free to install. Stores that are earlier in their journey may be better served starting with Essential Upsell and revisiting AOV.ai once their catalog and order data has grown.

Conclusion

We spent a significant amount of time going through each of these apps looking at the features, the pricing, and what it actually feels like to use them day-to-day. Every app on this list earned its place; we cut the ones that didn't genuinely impress us. But if you need to pick one to start with, the answer is straightforward:

That said, the right pick depends on your specific strategy. If your store runs gift-with-purchase or BOGO campaigns, BOGOS is the specialist tool you need. If you sell products that naturally go together and bundling is your primary AOV lever, Kaching Bundles is the better fit. If you want to upsell at the checkout itself, SMART Checkout opens up a placement that most apps cannot touch. And if you have a large catalog and want AI to handle the heavy lifting, AOV.ai is worth installing while it is still free.

Don't Install Too Many Apps at Once

It can be challenging to install several apps simultaneously to find the right fit, but we would strongly advise against doing this on your live store. Upsell apps inject code into your theme files and that code may persist even after you uninstall the app, potentially causing conflicts or slowing your store down. The better approach is to test one app at a time on a duplicate of your theme, confirm it works cleanly, and only then deploy it to your live store. That way you always know exactly what is running and why.