Every part of the customer journey leads to one moment: pressing pay.
Merchants should have full control over how customers experience that moment.
The checkout should feel effortless; an extension of the brand. It should look, feel, and perform like the rest of the site, guiding customers through payment without ever breaking the flow.
But that’s often not the reality.
It’s not that teams don’t see the opportunity. The problem is the tools at their disposal.
They force a trade-off merchants shouldn’t be asked to make: move fast with rigid drop-in solutions, or gain flexibility at the cost of months of engineering with a headless build.
So we asked ourselves: what if merchants didn’t have to compromise? What if they could take complete control of their checkout without writing thousands of lines of code.
The evolution of the Primer Checkout gives merchants complete freedom and control over the checkout experience, without compromise.
Built on a modular, low-code architecture, every part of checkout, from form fields to buttons, can be added, removed, styled, and arranged independently. Merchants can refine each element to fit their brand and flow, adapting checkout in just a few lines of code and without engineering complexity.
With Primer Checkout, control isn’t a trade-off anymore. Merchants can move fast, stay flexible, and deliver a checkout that’s truly their own.
Tune into our Showcase on November 19th to learn more about the new Primer Checkout plus a first look at other new product releases. Register Now.
Checkout in action
We’ve talked about control and simplicity, now see it in action. Here’s our Senior Frontend Engineer, Jedrzej Lewandowski (JJ) launching a fully tailored checkout from scratch, in just a few minutes.
Complete control, unlimited outcomes
When we speak with merchants about checkout, one theme comes up again and again: experimentation.
Commerce moves quickly. Customer expectations evolve, new payment methods emerge, and small design choices can have a disproportionate impact on conversion.
The ability to experiment continuously, safely, and at scale is what enables businesses to stay ahead, and to build the highest-converting checkout possible.
Primer Checkout was built to deliver that capability.
Merchants can easily refine and evolve their checkout experience without rebuilds or long release cycles. Teams can test new layouts, flows, and payment options in minutes, measure results in real time, and optimize continuously based on what actually drives conversion.
This approach turns checkout from a static form into a living, adaptable part of the brand experience. It allows product teams to launch, learn, and optimize at speed, while developers can remain focused on other business priorities.
The result is a checkout that continuously evolves to convert more customers, wherever they are, and however they choose to pay.
5 ways Primer Checkout raises the bar
Primer Checkout brings together flexibility, speed, and performance to raise the standard for what checkout can do.
Advanced UX capabilities: Create checkout flows that feel seamless and on-brand, with dynamic layouts, personalized options, and support for every payment method.
Accelerated optimization: Test and update the checkout in minutes, not weeks. No new code, no release cycles, just quick changes that drive results.
Reduced development costs: Cut out maintenance and rebuilds, freeing developers to focus on other priorities.
Enhanced team agility: Give product and marketing teams the freedom to tweak, test, and localize checkout without waiting on engineering support.
Measurable revenue impact: A faster, smarter checkout means higher conversion, fewer drop-offs, and more revenue captured from every customer.
Delivering the highest performing checkout
The new Primer Checkout is also fast.
Speed is one of the biggest drivers of conversion, and in payments, every millisecond counts. Even a 100 ms improvement in load time can increase conversion rates by around 1%.
Primer Checkout delivers measurable gains across every step of the flow, with average latency for payments, 3D Secure, and alternative payment confirmations reduced by roughly 200 ms.
Those improvements translate directly into faster checkouts, smoother authentications, and fewer dropped payments.
The new standard for checkout
The trade-off between simplicity and control was never a technical necessity, it was a limitation of how checkout was designed.
Today, that limitation no longer exists. In a world where every interaction shapes customer experience and every optimization drives measurable results, compromise isn’t an option.
The no-compromise checkout is here, redefining what’s possible at the most critical moment in the journey to pay.





