Hi im looking for a upsell app for the cart so it would work in the way of replacing existing product in cart with upsell product.
So product X is in cart - customer is offered product Y and if accepted product X is replaced with Y.
Any recommendations? So far I only find apps that offer product Y added on top of product X in cart.
Hi @JustinasR, Great question! What you’re describing is sometimes called a “swap upsell” or “product replacement upsell,” and you’re right that most off-the-shelf apps default to add-on behavior rather than true replacement logic.
This is actually something that can be built with a custom solution — using Shopify’s Cart Transform API (available on Shopify Plus) or through a custom app, you can intercept the upsell acceptance and swap Product X for Product Y programmatically, giving you exactly the behavior you’re looking for.
I’m a Shopify app and Theme developer and this kind of cart customization is right in my wheelhouse — happy to help if you’d like to explore a custom solution. Other Shopify developers in the community may also be able to assist if you’re looking for options.
Feel free to reply here or reach out directly!
Yeah not sure i can afford custom coding for this guessing it would be in the thousands? App would be great
Hi @JustinasR,
That’s a fair concern. I think the good news is that what you’re describing is actually a fairly specific workflow rather than a large-scale store customization.
A true “swap upsell” (replacing Product X with Product Y when the offer is accepted) is technically achievable on Shopify, and it doesn’t necessarily require Shopify Plus.
I agree that an app would be the ideal solution here, especially since most upsell apps focus on adding products rather than replacing them. There may be other merchants looking for the same functionality.
If you come across an app that supports product replacement instead of add-on upsells, I’d be interested to hear about it as well. In the meantime, I’ll keep an eye out and share anything relevant that I find.
Hopefully Shopify or an app provider already has a solution available, because it’s an interesting use case.
Hi @JustinasR,
I’ve just checked out the search function on Shopify’s apps: Best Upsell and bundles Apps For 2026 - Shopify App Store
I’d read the descriptions and note the ratings. And this blog was at the bottom of the page:
Could be a useful place to begin. The blog in particular, and I’ve just quickly scanned it, looks promising, with the mention of apps Bold Upsell and ReConvert.
As an aside: I programmed a kind of upsell option for a store, but it’s not really what you’re asking for. For my client, they simply wanted the customer to become aware that if they bought more, they’d save (a discount was offered for multiple products in a single purchase). Sometimes, a custom solution isn’t a bank breaking investment. You can always ask, many people are happy to give you ballpark costs, and you aren’t under any pressure to agree - well shouldn’t be.
All the best with your search!
Hi @JustinasR,
I spent a bit more time looking into this and haven’t found an existing app that appears to support a true product replacement workflow in the cart.
Most upsell apps focus on adding another product, whereas your use case is specifically replacing Product X with Product Y when the customer accepts the offer.
It actually seems like a genuine gap in the current Shopify app ecosystem, so I can see why you’ve had trouble finding a solution.
From a technical perspective, though, it doesn’t appear to be a large-scale customization. It’s a fairly focused cart enhancement, so if you ever decide to explore custom options, it may be more straightforward than you initially expect.
I’d also be interested to hear if anyone else in the community has come across an app that supports this type of replacement upsell workflow.
What you’re looking for is a product swap/upgrade upsell, not a traditional cross-sell.
Most Shopify upsell apps are designed to add Product Y alongside Product X, which is why both products remain in the cart.
I’d look for apps that support:
If Product Y is simply a premium version of Product X, presenting it as an upgrade rather than an add-on upsell often converts better.
Curious to see what others are using for this, as it’s a more specific use case than standard cart upsells.
This sounds more like a “swap/upgrade upsell” than a regular cart upsell.
One thing I’d check before choosing an app is whether you already know the goal of this offer. Are you trying to increase AOV, move customers to a better-margin product, improve conversion, or reduce decision friction?
Also, I’d make sure you can actually track whether the swap is working: acceptance rate, AOV lift, conversion impact, and maybe even A/B test different versions of the offer. Sometimes replacing Product X with Product Y sounds good in theory, but without testing, it’s hard to know if it’s helping or hurting checkout.
If no app supports the exact replacement flow, this might need custom cart logic.
Hi @JustinasR
For product upgrades or swap-style upsells, I’d suggest checking Bold AI Upsell & Cross-Sell. It supports “upgrade and replace” offers, which sounds close to your use case: replacing Product X in the cart with Product Y when the customer accepts the upsell.
If you’re open to offering add-ons that complement the main products, I recommend checking the BOGOS: Free Gift Bundle Upsell app. It’s a good option for product-based add-ons, bundles, and upsell offers.
Best,
Ellie
Hi your BOGOS app does not have product sawp functionality.
Hi @JustinasR
As I mentioned earlier, if you wanna replace Product X with Product Y in the cart, you can try:
As they support swap/upgrade-style upsells.
If you’re open to offering the upsell product as an add-on instead of replacing the original item, then the BOGOS app can be a good option for that use case.
I hope my replies help your business 
Ellie
hi @JustinasR , the feature you want is usually called a “product swap” rather than an upsell (which is why most apps only add Y on top of X), I haven’t tried it but it seels the Bold app offers what you want
I have used several and the best one so far is Edge cart. It is really easy to use
Edge cart does it. Have you tried?
Hey @JustinasR . Hope you are doing well.
You can try Rebuy Smart cart, its support swap style upsells where product X is replaced by product Y, not just added on top.
