How do I add UpsellPlus to Shopify Checkout Extensibility?


Chris Rausch


April 30, 2023

Customizing your checkout process is a crucial part of any successful online business. With the introduction of Checkout Extensibility, it’s easier than ever to make changes, integrate with apps, and keep your checkout safe from disasters without any prior development experience required.

In this article, we’ll go over why you should upgrade to Shopify Checkout Extensibility, how to get started, and walk you through getting UpsellPlus setup so that you can begin increasing your AOV.

Looking to get started? Check us out on the Shopify store to get started with a 7 day free trial.

What is Shopify Checkout Extensibility?

Checkout Extensibility is the new checkout system that will replace Shopify liquid.checkout in order to extend the functionality and usability of the platform’s most crucial page. 

Shopify Checkout Extensibility is available to Shopify Plus businesses who upgrade their store (more on that later). The new checkout framework aims to make it easier and more user-friendly to take control over your checkout.’s look, feel, and experience. You can do so with native customization options or by extending functionality with checkout extensions for Shopify.

Benefits of upgrading to Checkout Extensibility

Shopify Checkout Extensibility has a number of benefits compared to Shopify checkout.liquid.


With Checkout Extensibility, you’re able to customize your checkout more easily than ever before. Simple things like editing styles, branding, and elements of your page can be accomplished through the checkout interface without any need for coding or developmental experience.

Improved user experience

With Shopify Checkout Extensibility, you have exceptional control over the checkout experience for your customers. You can custom-tailor the experience to look and feel great while maximizing conversions and minimizing abandoned carts.


A problem with Shopify’s checkout.liquid checkout process was that it was code-based, so any updates to the platform or apps being used put the entirety of your checkout at risk of going offline. With Checkout Extensibility, you can update Shopify and your apps without worrying about losing out on revenue because customers can’t checkout.

Access to apps

Checkout Extensibility is an app-based framework that allows you to easily add any app without impacting your checkout in unintended ways. They make it very easy for you to safely make the changes you need to through their interface, saving you time and money on working with a developer. Checkout extensions for Shopify also expand your customization options to include things like adding more payment methods, adding shipping calculators, and more.

How to upgrade to Shopify’s Checkout Extensibility

upgrade to Shopify Checkout Extensibility

To upgrade to Shopify Checkout Extensibility, you first have to be sure that you’re a Shopify Plus member so that you can access all the features and customize your checkout.

Then, you should check your existing checkout and note any features or apps that you use as well as any customizations that have been made to your checkout page. This gives you an idea of what apps to look for and what features to enable for the new checkout.

Once you’re ready, go to the Shopify admin page, hit “settings”, and then go to checkout. Under “checkout customization”, click “create draft checkout” and make your customizations, then publish the new checkout process.

UpsellPlus: an essential extension for Shopify Checkout Extensibility

Shopify’s Checkout Extensibility is all about making your checkout experience more seamless and effective. However, to make the most of these improvements, you also need to focus on maximizing your profitability so that increased conversions can lead to higher revenue.

UpsellPlus is a complete cross-sell and upsell app for Shopify that makes it easy for you to increase average order values. The app helps you build effective upsells and cross-sells that you can implement on multiple steps of your checkout process, including the cart, checkout page, and post-purchase pages.

You can build upsell or cross-sell flows that use conditional logic to ensure your offers always make sense for better results. ShopBrain, UpsellPlus’s algorithm, also makes recommendations for offers to make based on past success and purchase data, allowing you to maximize your conversions for improved revenue.

Overall, you need an effective upsell and cross-sell app to thrive as a Shopify business - and UpsellPlus supplies just that.

Adding UpsellPlus to Shopify Checkout Extensibility

Adding UpsellPlus to your store is as easy as adding any other tool - even for Checkout Extensibility.

Simply head over to the Shopify App Store page for UpsellPlus and add the app to your store. Once you download it and apply the app, you’ll be able to start going through the process of enabling features, building your offers, and integrating them into your checkout flow.

Within the app, you’ll begin creating your upsell or cross-sell offer. Here you choose products, discounts, text, and other factors that control how your offer looks and performs. Be sure to provide relevant offers that add value for the customer while still increasing your profitability.

Implementing UpsellPlus in your Shopify custom checkout

implement upsellplus wiht shopify checkout extensibility

Once you have the app installed and ready to go, you’ll want to click the big green “go to checkout editor” button to reach the checkout editor interface. Here you can add the app to your checkout editor so that you can begin implementing the offer. You can choose between multiple pages and locations on each page, allowing you to try a bunch of combinations to see what works best. Changing the offer location is just as easy and can be done at any time for total control over your upselling and cross-selling efforts.

Get started today with Shopify Checkout Extensibility and UpsellPlus

UpsellPlus is the #1 choice for your Shopify upsell app. Working with both checkout.liquid and Shopify Checkout Extensibility, you can easily get started with generating more revenue, increasing average order values, and providing a better customer experience.

Begin your free trial today!

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