Checkout B | Checkout Upsells vs THDC Checkout Builder
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 12, 2026 for Checkout B, Feb 19, 2026 for THDC Checkout Builder.
The short answer
- Checkout B lists 22 features THDC Checkout Builder’s listing doesn’t mention, including Announcement bar, Conversion rates, Custom CSS.
Head to head
- United States
- Germany
- United Kingdom
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Checkout Plus
- · Access to all features
- · Advanced Branding (Custom CSS + Fonts)
- · Analytics
- · Checkout Upsells
- · Customize Thank you & Order Status Pages
- · Customize Thank you & Order Status Pages
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCheckout Builder gives Shopify Plus merchants full control over Checkout with high-converting, extensible blocks. Add upsells, cross-sells, trust badges, custom messaging, dynamic content, and conditional logic—no code required. Built on Shopify Checkout Extensibility, it’s fast, secure, upgrade-safe, and fully compatible with Shopify updates.
THDC Checkout Builder empowers plus merchants to effortlessly tailor every aspect of their Shopify store's checkout process by harnessing the power of Shopify's advanced checkout extensibility and recommendation algorithm. From eye-catching banners that communicate brand messages to interactive forms and inputs, the possibilities are limitless.
- Increase revenue w/ ROI-focused elements: conditional upsells, upgrades, & more.
- Add your branding to checkout with our advanced branding editor & live preview.
- Increase conversion with free shipping upsells & dynamic content for trust.
- Incorporate custom fields for gift messages, delivery notes, etc.
- Widgets - Checkout widgets to help you show and collect data from your users.
- Conditionals - Decide when and to whom your widgets are displayed.
- Upsells - Generate revenue with cart, progress and post purchase upsells.
- Bespoke widget support - Create custom widgets tailored to you with our support.
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Checkout B |  THDC Checkout Builder |
|---|---|---|
| Detected stores | 104 | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Apparel & Accessories, Home & Garden, Health & Beauty | Not published |
| Top store countries | United States, Germany, United Kingdom | Not published |
Reviews
| Measure | Checkout B | THDC Checkout Builder |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 6 | Not published |
| New reviews, 28 days | 0 | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Checkout B | THDC Checkout Builder |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $199/month | No monthly plan listed |
| Longest free trial | 7 days | Not listed |
| Plans listed | 1 | Not published |
Listing
| Measure | Checkout B | THDC Checkout Builder |
|---|---|---|
| Shopify category rank | #192 | Not enough data |
| Shopify App Charts | #11 in Checkout - Other | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Sep 6, 2023 | Jun 4, 2024 |
| Languages | 1 | 1 |
| Developer | Checkout Builder | THDC Technologies |
FAQ
Checkout B and THDC Checkout Builder: common questions
- What features does each app list that the other doesn’t?
- Checkout B lists 22 the others don’t mention, such as Announcement bar, Conversion rates, Custom CSS, Custom HTML. THDC Checkout Builder lists 10 the others don’t mention, such as Announcements, Bundles, Cart drawer, Custom notes. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 12, 2026 for Checkout B, Feb 19, 2026 for THDC Checkout Builder; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 12, 2026 for Checkout B, Feb 19, 2026 for THDC Checkout Builder. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.