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1
Click Upsells, No Re-Entered Payment Details
01The Problem
Most upsell apps add scripts to every page, use templates that do not match your brand, and can't check what's already in the cart before offering a discount.
The problem
You installed an upsell app to raise average order value, but the offer looks like a template, doesn't understand your discount rules, and sometimes offers a product the customer already bought. Worse, it adds another script to your storefront, and your page speed drops right as you're trying to sell more.
How we solve it
We build one-click post-purchase offers, order bumps, and Shopify Plus checkout upsells as custom logic matched to your catalog and discount rules, native to Shopify's supported extension points, so checkout stays fast and every offer makes sense for what's already in the cart.
Logic that checks the cart
Offers based on what's already been bought, not a blind template.
No added checkout weight
Built on native extension points instead of heavy app scripts.
You own the upsell logic
No dependency on an app's pricing or roadmap for a core revenue feature.
02Our Upsell Development Process
You see exactly which upsells we're building and why before a single customer sees one.
03What's Included
Every project covers audit, design, build, testing, and a handover your team can manage.
Upsell audit
A review of your products and margins to find the highest-value upsell opportunities.
Post-purchase offers
One-click upsells shown right after checkout, no re-entered payment details.
Order bumps
Pre-checkout add-on offers placed on the cart or checkout page.
Checkout upsells (Plus)
Offers built into the checkout steps themselves on Shopify Plus.
Discount & cart logic
Rules that check the cart so offers never clash or repeat.
Testing & handover
Test orders across cart combinations, plus documentation for your team.
04Compare Options
Apps are quick and generalists are flexible. Both work for simple needs. Here is where each one runs out and where a dedicated build pays off.
| Feature | DeveloperLookBEST FIT | Upsell Apps | Generalist Developer |
|---|---|---|---|
| Offer logic | Custom, checks the full cart | Limited to the app's rule builder | Depends on the person |
| Checkout speed | Native, no extra scripts | Slows with each app added | Varies by developer |
| Discount conflicts | Resolved in one build | Common with stacked apps | Case by case |
| Checkout-step upsells (Plus) | Built with Functions and extensions | Rarely supported | Often unfamiliar with Functions |
| Ownership of the code | Yours, no monthly app fee | Rented, tied to app subscription | Case by case |
| QA on real orders | Every offer, every cart combination | Not included | Often limited |
| Monthly cost | One project, no app fees | Ongoing fee per app | Hourly, if available |
05Projects We've Built
A selection of Shopify and ecommerce builds shipped for clients. Each one started with a business problem, not a theme.
06What Our Clients Say
Feedback from ecommerce teams we have built stores, checkouts, and integrations for.
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We had a pretty specific idea of what we wanted our website to become, but I wasn’t sure how easily we could explain all of it to a development team. There were quite a few moving parts, and we were working toward a deadline, so I expected a few things to get lost along the way. That never really happened. They understood what we were trying to achieve, kept us updated throughout the process, and got everything ready within the agreed timeline. The final site feels much easier to navigate, works beautifully on mobile, and is noticeably smoother for our customers. It was a huge relief seeing the original idea actually turn into the website we had in mind.
Michael Bennett
Founder & CEO of Northbridge Consulting
The mobile experience is probably my favourite part of the new site. We had spent a lot of time making sure the desktop version looked right, and the team kept pushing us to think about how everything would actually feel on a phone too. They were right. The navigation is clean, the interactions feel natural, and everything we’ve tested so far works exactly as it should. They also went through the links, forms, integrations, and other details more than once before launch, which I really appreciated. And even after going live, we could still reach out when something came up. The whole process felt friendly, organised, and surprisingly straightforward.
James Whitmore
Head of Marketing of Lumen Outdoor
What I appreciate most is that the website is actually easy for us to manage now. We can update content ourselves instead of sending a developer a message every time we need to change something small. They also paid attention to the technical SEO side, which mattered to us because we didn’t want a new website to create problems for the traffic we already had. I’ve probably asked more questions than I should have since launch, but every question has been handled patiently and without any fuss. The team is easy to work with, they explain things clearly, and when we need something changed, they focus on getting it done rather than making the process complicated.
Sarah Mitchell
Operations Manager of Harborline Commerce
150+
Projects shipped
10+
Years in development
Top 3%
Upwork Top Rated Plus
5★
Average review score
07Work Culture
Upsells touch the moment a customer is already paying you. These are the habits we bring to every offer we build.
Every upsell is scoped around products and bundles worth showing, not a generic list.
Every offer is tested on mid-range mobile devices before it reaches customers.
Built on Shopify's supported post-purchase and checkout extension points.
Offers check what's already in the cart, so nothing repeats or clashes.
Every offer runs against real test orders across cart combinations.
Logic that's easy to extend with new products or seasonal offers later.
08Overview
DeveloperLook builds custom Shopify upsell flows: one-click post-purchase offers, order bumps before checkout, and Shopify Plus checkout upsells, matched to your products and discount rules instead of a generic app template. Projects start from $699, most go live in 1 to 2 weeks, and you keep the code.
Who it's for
Stores relying on a generic upsell app
The app's templates do not match your brand or your discount rules, and support is slow.
Shopify Plus merchants wanting checkout upsells
You want an offer shown during checkout itself, not only after payment.
Brands with complex bundle or discount logic
Your upsell needs to check what's already in the cart, apply the right discount, and avoid conflicting offers.
Stores that tested upsell apps and saw slow checkout
An app added scripts that slowed your store, and you want a native, faster build instead.
Merchants who want ownership of the logic
You do not want to depend on an app's roadmap or pricing changes for a feature core to your margins.
Not a fit for
You want a quick app install with default templates and no custom logic. A listed upsell app is the faster route.
You need custom payment, shipping, or discount rules unrelated to upsells. Our Shopify Plus Checkout Customization service covers that.
You are not on Shopify Plus and specifically need a checkout-step upsell. Post-purchase and order bump upsells still work on your plan.
You need card data processed outside Shopify's hosted checkout.
09Pricing
These are starting points in USD. Your final price depends on how many offers and how complex the discount logic is, and you get a fixed proposal after a free upsell audit.
10For Agencies
You own the client and the store design. We supply the upsell engineering: post-purchase offers, order bumps, and checkout upsells. Send us the brief and we build, test, and hand over under your brand, on your deadline.
Stay client-facing
We work under your brand, so you keep the relationship and the credit.
Predictable delivery
Clear scope and a delivery date, with QA before anything reaches your client.
Upsell specialists
Post-purchase, order bump, and checkout upsell work handled without hand-holding.
Flexible capacity
Bring us in for one upsell flow or a queue of client requests.
01
Share the brief
Send the store access, target products, and the client deadline.
02
We propose and staff
You get an estimate and a delivery date before you commit.
03
Build and hand off
We develop, test, and deliver the upsell flow and documentation under your brand.
11The Right Technology for Your Project
We build with Shopify's supported post-purchase and checkout extension points, then match whatever your store already runs on.
Post-Purchase API
Checkout UI Extensions
Shopify Functions
Shopify Flow
Pick a 30-minute slot that works for you. We meet on Google Meet to align on goals, scope, and the right next step.
12FAQ
Straight answers on Shopify upsells, checkout upsells, cost, timelines, and what happens after launch.
You can add a pre-checkout order bump, a one-click post-purchase offer shown after payment, or, on Shopify Plus, an offer built into the checkout steps themselves. We build whichever combination fits your products and margins.
For post-purchase offers we build on Shopify's Post-Purchase API, so the offer appears after checkout without asking for payment details again. For order bumps we add the offer to your cart or checkout page as a native block.
We connect your product catalog to the offer logic, so upsells recommend specific products or bundles based on what's already in the cart, rather than showing the same offer to everyone.
An upsell is an offer to buy a higher-value or additional product, shown before, during, or right after checkout. A post-purchase upsell happens after payment with one click, while an order bump happens before the customer pays.
On Shopify Plus, checkout UI extensions can show an offer directly on the payment or information step. Shopify Functions handle the discount and eligibility logic, so the offer only appears for the right cart.
We use Shopify's native Post-Purchase API to build a one-click offer that appears immediately after the customer pays. Because it uses the same payment method already on file, there is no separate checkout to complete.
App choice depends on how much custom logic you need. Off-the-shelf apps work for simple, single offers. When you need cart-aware logic, custom discount rules, or a design that matches your brand exactly, a custom build avoids the limits of a template-based app.
We start with a short audit of your products and margins, design the offer and discount logic, then build it as a post-purchase offer, order bump, or checkout upsell extension, and test it on real orders before launch.
Yes, and we build multi-offer flows regularly, for example a bundle at checkout plus a different one-click offer after payment. The key is making sure the logic checks what's already been offered or bought so customers don't see conflicting or repeated offers.
Projects start at $699 for a single post-purchase offer or order bump, and scale up for multi-offer programs or Shopify Plus checkout upsells. You get a fixed price after a free upsell audit.
