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Paid Upfront, Not Waiting On Installments
01The Problem
Klarna, Afterpay, Affirm, and Sezzle all promise the same outcome. Picking without comparing your price points and audience often means redoing the integration later.
The problem
You've decided buy now pay later would help conversion, but Klarna, Afterpay, Affirm, and Sezzle all promise similar results, and picking wrong means redoing the integration later or confusing shoppers with the wrong option at checkout.
How we solve it
We compare providers against your price points and audience, then integrate the ones that fit, whether that's one provider or all four, with priority and display logic so shoppers see the right option first and Shop Pay Installments doesn't conflict with what you add.
Provider fit, not guesswork
Recommendation based on your price points, audience, and existing Shop Pay setup.
One or all four providers
Same team whether you add a single BNPL option or the full Klarna, Afterpay, Affirm, and Sezzle stack.
Tested across order types
Refunds, partial refunds, and cancellations checked before customers see them.
02Our BNPL Integration Process
You see exactly which providers fit and how they'll appear before a single customer uses them.
03What's Included
Every project covers provider comparison, integration, messaging, testing, and a handover your team can manage.
BNPL provider comparison
A recommendation matched to your price points, audience, and current payment setup.
Checkout integration
One or more BNPL providers connected on Shopify, WooCommerce, BigCommerce, or a custom checkout.
Priority & display logic
Rules for which provider shows first when you offer more than one.
On-page messaging
Pay-later pricing shown on product and cart pages for every provider you add.
Refund & cancellation testing
Full and partial refunds tested across every provider you add.
Documentation & handover
Plain instructions for managing orders and refunds across providers going forward.
04Compare Options
Going straight to one provider's app gets you live, and a generalist can wire it up too. Here is where each one runs out and where a dedicated BNPL project pays off.
| Feature | DeveloperLookBEST FIT | Picking One Provider Yourself | Generalist Developer |
|---|---|---|---|
| Provider selection guidance | Matched to your price points and audience | Guesswork or trend-following | Rarely offered |
| Multi-provider display logic | Built in and tested | Manual, error-prone | Case by case |
| Platform coverage | Shopify, WooCommerce, BigCommerce, custom | Depends on the plugin | Case by case |
| Tested refunds and edge cases | Every case checked | Not included | Often limited |
| Shop Pay Installments compatibility | Checked and confirmed | Often untested | Rarely checked |
| Launch support | 14 days included | Each provider's own support | Often none |
| Cost | One fixed project covering all providers | Pay per provider setup | 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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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
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
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
150+
Projects shipped
10+
Years in development
Top 3%
Upwork Top Rated Plus
5★
Average review score
07Work Culture
Payment methods sit right at the moment customers decide to buy. These are the habits we bring to every BNPL project.
Provider recommendations based on your price points and audience, not a default pick.
Every order type, refund, and edge case is checked before launch.
Built with each provider's supported APIs and platform apps, not workarounds.
BNPL badges and messaging styled to fit your store, not a generic widget.
You know exactly what you're responsible for and what each provider covers.
Work that's easy to extend if you add another provider down the line.
08Overview
DeveloperLook compares Klarna, Afterpay, Affirm, and Sezzle against your price points and audience, then integrates the ones that fit, whether that's one provider or the full stack, on Shopify, WooCommerce, BigCommerce, or a custom checkout. Projects start from $499, and you get paid upfront while the provider carries the installment risk.
Who it's for
Stores that haven't picked a BNPL provider yet
You know buy now pay later would help conversion, but Klarna vs Afterpay vs Affirm vs Sezzle all look similar from the outside.
Stores wanting more than one BNPL option
You want to show multiple pay-later choices at checkout so shoppers pick the one they already have an account with.
Shopify, WooCommerce, and BigCommerce stores wanting a clean setup
You want BNPL installed correctly the first time, tested across order types, and matched to your brand.
Stores already using Shop Pay Installments
You want to add other BNPL providers alongside Shop Pay's built-in option without them conflicting at checkout.
Agencies and merchants who want one team for the whole BNPL stack
You would rather brief one project than run four separate provider integrations.
Not a fit for
You already know you want Klarna specifically. Our Klarna Integration service is scoped and priced for that alone.
You already know you want Afterpay specifically. Our Afterpay Integration service is scoped and priced for that alone.
You already know you want Affirm specifically. Our Affirm Integration service is scoped and priced for that alone.
You already know you want Sezzle specifically. Our Sezzle Integration service is scoped and priced for that alone.
09Pricing
These are starting points in USD. Your final price depends on how many providers you add and your platform, and you get a fixed proposal after a free review.
10For Agencies
You own the client and the store design. We supply the BNPL provider comparison and integration work. Send us the brief and we recommend, connect, 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.
BNPL specialists
Klarna, Afterpay, Affirm, and Sezzle integrations handled without hand-holding.
Flexible capacity
Bring us in for one provider or a full multi-BNPL rollout.
01
Share the brief
Send the store access, target pages, and the client deadline.
02
We propose and staff
You get a provider recommendation, an estimate, and a delivery date before you commit.
03
Build and hand off
We integrate, test, and deliver documentation under your brand.
11The Right Technology for Your Project
We integrate each BNPL provider through its supported APIs and platform apps, then match whatever your store already runs on.
Klarna Payments API
Afterpay API
Affirm API
Sezzle Payments API
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 choosing a BNPL provider, integration cost, timelines, and what happens for merchants.
You enable it either through Shopify's native Shop Pay Installments, powered by Affirm, or by installing a specific provider's app, Klarna, Afterpay, Affirm, or Sezzle, then turning it on as a payment option at checkout. We handle the setup and confirm it displays correctly.
Setup means connecting the provider's account to Shopify, enabling it in payment settings, adding on-page messaging on product and cart pages, and testing orders and refunds before it goes live to customers.
The customer splits their payment into installments while you receive the full order amount upfront from the BNPL provider. The provider collects payments from the customer and carries the risk if one is missed.
It depends on your price points and audience. Affirm suits higher-ticket, longer-term financing, Klarna and Afterpay work well for general ecommerce, and Sezzle tends to reach younger, more budget-conscious shoppers. We can recommend a fit after reviewing your store.
Yes. Many stores run two or more providers side by side, so shoppers pick whichever one they already have an account with. We set the display order and styling so it does not look cluttered.
Stores commonly see a higher average order value after adding BNPL, since splitting a purchase into smaller payments lowers the perceived cost at checkout. Results vary by provider, price point, and audience.
Most BNPL providers charge a transaction fee similar to standard card processing, often a percentage plus a small fixed amount per order. Exact rates vary by provider and depend on your agreement and sales volume.
A single provider on Shopify or WooCommerce typically takes 3 to 5 business days. Adding multiple providers with priority and display logic usually takes 1 to 3 weeks depending on how many you add.
Yes, they can run side by side. Shop Pay Installments is Shopify's own option, powered by Affirm, and other providers like Klarna, Afterpay, or Sezzle can be added as additional choices at checkout without conflicting.
Most providers offer a basic self-serve app, but getting on-page messaging placed correctly, testing refunds, and setting priority across multiple providers is where a developer saves you from a messy or broken checkout.
