THDC Checkout Builder vs UpsellPlus Checkout Upsell
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Feb 19, 2026 for THDC Checkout Builder, Nov 12, 2026 for UpsellPlus Checkout Upsell.
The short answer
- Only UpsellPlus Checkout Upsell lists a free plan.
- UpsellPlus Checkout Upsell lists 22 features THDC Checkout Builder’s listing doesn’t mention, including A/B testing, AI recommendations, Announcement bar.
Head to head
Grow AOV, post-purchase, BOGO, offers, funnels, gifts
- United States
- United Kingdom
- Sweden
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · Analytics
- · Build for free. Launch with a free trial
- · Checkout Upsells (Plus only)
- · Choose from all 12 upsell types
- · Product, Cart, Post-purchase upsells
Basic
- · Cart Page, Pop-up & Drawer Upsells
- · Earn back fees with UpsellPlus Earn
- · Free Gifts
- · Multivariate A/B testing
- · Post-purchase Upsells
- · Product Page Upsells
Pro
- · AI recommendations
- · Checkout Customization
- · Checkout Upsells
- · Earn back fees with UpsellPlus Earn
- · Everything in Basic, plus:
- · Thank You Page Customizations
Advanced
- · Checkout & TY page Customization
- · Checkout Upsells
- · Earn back fees with UpsellPlus Earn
- · Everything in Basic, plus:
- · Live support with 30s replies
- · Multivariate A/B Testing
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureTHDC 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.
UpsellPlus helps increase average order value with personalized upsells and cross sells across product pages, cart drawers, checkout, post purchase, thank you, order status and customer account pages. Staff can also upsell in store with offers on the Shopify POS home screen, added in one tap. Create one click post purchase offers, free gifts, subscription upgrades and checkout customizations.
- 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.
- Customize checkout, cart and post-purchase page with upsells and customizations
- Upsell one-off purchases to subscriptions to grow your recurring revenue
- Add custom fields to checkout page for gift message, delivery date/notes
- A/B test checkout upsells to learn what works best
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 |  THDC Checkout Builder |  UpsellPlus Checkout Upsell |
|---|---|---|
| Detected stores | Not published | 118 |
| Net store change, 28 days | 0 | +11 |
| Stores added, 28 days | Not enough data | 13 |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Health & Beauty, Apparel & Accessories, Food, Beverages & Tobacco |
| Top store countries | Not published | United States, United Kingdom, Sweden |
Reviews
| Measure | THDC Checkout Builder | UpsellPlus Checkout Upsell |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 151 |
| New reviews, 28 days | Not enough data | 5 |
| Reviewers a year or more in | Not enough data | 11% |
Pricing
| Measure | THDC Checkout Builder | UpsellPlus Checkout Upsell |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | No monthly plan listed | $49/month |
| Longest free trial | Not listed | 14 days |
| Plans listed | Not published | 4 |
Listing
| Measure | THDC Checkout Builder | UpsellPlus Checkout Upsell |
|---|---|---|
| Shopify category rank | Not enough data | #22 |
| Shopify App Charts | Not on this week’s charts | #10 in Checkout - Other |
| Built for Shopify | No | Yes |
| Launched | Jun 4, 2024 | Nov 3, 2021 |
| Languages | 1 | 1 |
| Developer | THDC Technologies | UpsellPlus |
FAQ
THDC Checkout Builder and UpsellPlus Checkout Upsell: common questions
- Is THDC Checkout Builder or UpsellPlus Checkout Upsell cheaper?
- Only UpsellPlus Checkout Upsell lists a free plan. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- THDC Checkout Builder lists 11 the others don’t mention, such as Announcements, Bundles, Cart drawer, Custom notes. UpsellPlus Checkout Upsell lists 22 the others don’t mention, such as A/B testing, AI recommendations, Announcement bar, Cart drawer. 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 Feb 19, 2026 for THDC Checkout Builder, Nov 12, 2026 for UpsellPlus Checkout Upsell; 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 Feb 19, 2026 for THDC Checkout Builder, Nov 12, 2026 for UpsellPlus Checkout Upsell. 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.