Best Shopify upsell apps for UK stores: Selleasy vs AfterSell vs ReConvert

If you are choosing a Shopify upsell app, do not start with the longest feature list. Start with the point in the buying journey where you are actually leaving money on the table: the product page, the cart, checkout, or after payment.

For a small UK ecommerce store, the right upsell app is usually the one that solves one clear problem without adding unnecessary cost, complexity or friction. Selleasy, AfterSell and ReConvert can all increase average order value in different ways, but they are not interchangeable.

Quick answer: Selleasy is the most straightforward low-cost starting point for product-page and cart offers. AfterSell is strongest when post-purchase offers are the priority. ReConvert is the broadest full-funnel option of the three, but its pricing structure deserves a closer look as order volume grows. This comparison is based on current public Shopify App Store information, not a hands-on test of each app.

What should an upsell app actually do?

An upsell encourages a customer to spend more by choosing a larger, upgraded or additional item. A cross-sell recommends something complementary. On Shopify, those offers can appear on the product page, in the cart, during eligible checkout experiences, on the post-purchase page or on thank-you and order-status pages.

The important question is not “which app has the most widgets?”. It is “where is the best low-friction opportunity in my store?”. If your product page is already confusing, another recommendation block can make it worse. If the cart is already overloaded, an upsell drawer can distract rather than help. And if your average order value problem is really a merchandising or pricing problem, an app will not fix the underlying issue.

Before installing anything, check whether your product page is doing its basic job and whether your checkout still contains avoidable friction.

Selleasy vs AfterSell vs ReConvert: the practical comparison

Pricing below was checked on 1 October 2026. The Shopify App Store listings state these charges in US dollars, so your actual sterling cost will vary with exchange rates and any applicable taxes.

App	Best fit	Current entry pricing	Main strength	Main caution
Selleasy	Small stores wanting simple product-page, cart and bundle offers	Free up to 50 orders/month; $9/month up to 500 orders	Wide range of upsell placements at a low starting cost	Easy to overuse if you add too many offers at once
AfterSell	Stores prioritising post-purchase offers and more advanced funnel testing	Post-purchase plan from $34.99/month; Complete from $79.99/month	Strong post-purchase focus, testing and funnel tools	Higher fixed monthly cost for smaller stores
ReConvert	Stores wanting product, cart, checkout and post-purchase tools in one app	Free tier; Growth from $9.99/month	Broad full-funnel coverage and testing options	Higher tiers rise sharply, so check how the pricing model scales for you

Selleasy: best suited to a simple, low-cost start

Selleasy's Shopify App Store listing currently includes frequently-bought-together offers, product add-ons, cart upsells, checkout upsells, post-purchase offers and thank-you-page cross-sells. Its free tier covers stores up to 50 orders per month, with the next tier listed at $9 per month for up to 500 orders.

That pricing makes it an attractive starting point if you want to test one or two clear merchandising ideas without committing to a larger monthly software bill. For example, a coffee equipment retailer could pair filters with a brewer, or a skincare store could add a complementary product beside the main item.

Who it is for: small and growing Shopify stores with obvious complementary products, bundles or add-ons.

Who should skip it for now: stores where the bigger issue is weak product positioning, low trust or poor conversion before the upsell is even seen.

AfterSell: stronger when post-purchase is the main opportunity

AfterSell's current App Store listing puts one-click post-purchase offers at the centre of the product, alongside thank-you-page offers, funnel testing, product-page upsells and an AI cart on higher plans. Its current Post-Purchase plan is listed at $34.99 per month, with a Complete plan at $79.99 per month.

That can make sense when you already convert reasonably well and want to earn more from customers after the original purchase is secure. The attraction of post-purchase is simple: the customer has already completed the main order, so a relevant extra offer can increase order value without adding another decision before payment.

There are still platform constraints. Shopify says post-purchase apps can add an offer after payment and before the order-confirmation page, but only one app can provide post-purchase functionality at a time. Shopify also notes that availability can depend on the payment method and order type. Shopify's checkout-app guidance explains the current rules.

Who it is for: stores with a healthy base conversion rate, enough order volume to test offers properly, and a clear post-purchase product relationship.

Who should skip it for now: very small stores where a £-equivalent monthly fee is difficult to justify before the basic funnel is proven.

ReConvert: broad coverage, but watch how the economics scale

ReConvert's current App Store listing covers product-page, cart, checkout and post-purchase upselling, plus A/B testing, segmentation and product recommendations. The current free tier applies up to 50 orders or $50 in upsell revenue, while Growth starts at $9.99 per month. Higher tiers become materially more expensive.

The appeal is breadth. If you want to test several points in the funnel from one system, ReConvert gives you more room to do that than a narrowly focused post-purchase tool.

The trade-off is that more capability can create more decisions. Small stores rarely need a complicated upsell architecture on day one. If you install a broad tool, resist the temptation to activate every available placement at once.

Who it is for: merchants who want to test several upsell locations and are comfortable managing a more involved funnel.

Who should skip it for now: businesses that only need one simple add-on or bundle and want the lowest possible operational overhead.

Do you actually need an upsell app?

Sometimes the right answer is no.

If customers are not buying the core product, an upsell app is downstream of the real problem. Fix the main purchase decision first. The same applies when you have too much stock sitting in the wrong products: in that case, better merchandising, bundling or a deliberate stock-recovery plan may matter more than adding another app. Our guide to clearing slow-moving Shopify stock without destroying margin is a better starting point for that problem.

An upsell app is most useful when three things are already true:

• customers are buying the core product consistently;
• you have a genuinely relevant add-on, upgrade or complementary item;
• you can measure whether the extra revenue produces extra profit after discounts, app fees and fulfilment costs.

Use profit, not attributed upsell revenue, to judge the app

Most upsell software will show the extra revenue it attributes to its offers. That is useful, but it is not the final answer.

Suppose an app attributes £1,000 of additional monthly revenue. If those offers carry heavy discounts, low-margin products, extra pick-and-pack costs or higher returns, the commercial result can be much smaller than the revenue number suggests.

A better decision rule is:

incremental gross profit from accepted offers − app cost − additional fulfilment/discount costs = the value of the upsell programme.

If you cannot measure that reasonably well, do not keep adding offers simply because the dashboard says they generated revenue.

A five-step way to choose

1. Choose one problem. Product-page add-on? Cart bundle? Post-purchase upgrade? Start with one.
2. Choose one customer moment. Do not make the shopper process three different upsell messages on the same journey.
3. Check margin before discounts. A 15% increase in order value is not useful if you give most of it away.
4. Set a clean test period. Track offer views, acceptance rate, incremental gross profit, overall conversion rate and returns.
5. Remove what does not earn its place. If an offer adds clutter without profitable incremental sales, switch it off.

Warning signs the app is not the real fix

• Your paid traffic is reaching product pages but very few visitors add the main item to cart.
• Your offer depends on large discounts to get accepted.
• You are using upsells to move products customers do not actually want.
• Your cart or checkout has become visually busy after several apps were added.
• You cannot explain which offer is profitable after product margin and fulfilment costs.

If several of those sound familiar, a broader diagnosis will usually be more valuable than installing app number six. A 20-point Shopify Store health check is designed for a wider store review rather than a single upsell decision.

So which Shopify upsell app should a small UK store choose?

For a simple and inexpensive first test, Selleasy is the easiest of these three to justify on current pricing. If post-purchase is your specific opportunity and you have enough order volume to test it properly, AfterSell is the more focused choice. If you want one system spanning product page through post-purchase, ReConvert offers the broadest toolkit, but check how its pricing scales against your own volume.

None of those choices matters as much as choosing the right offer. A relevant add-on shown at the right moment can be useful. A random “you may also like” block added because an app made it easy is just more noise.

If you are not sure whether the problem is AOV, merchandising, conversion, stock, or the app stack itself, Send Me Your Mess is the lower-friction place to start. Send the store, screenshots or numbers; the job is to identify the expensive problem before you pay to solve the wrong one.