CartyLabs Checkout Customizer vs Checkout B | Checkout Upsells
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of May 5, 2026 for CartyLabs Checkout Customizer, Nov 8, 2026 for Checkout B.
The short answer
- Checkout B lists 26 features CartyLabs Checkout Customizer’s listing doesn’t mention, including Announcement bar, Checkout upsell, Click-through rates.
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 featureCartyLabs Checkout Upsell helps Shopify merchants fully customize their checkout experience. Add product recommendations and upsells at checkout, display rewards progress bars to encourage larger carts, and show targeted banners with condition-based rules. Customize checkout branding with colors, text, and layouts.
Checkout 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.
- Product recommendations and upsells at checkout to promote order value
- Customizable checkout branding with colors, typography, and layout profiles
- Rewards progress bar with milestones to encourage larger cart sizes
- Rule-based targeted banners, terms and conditions, and shipping protection
- 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.
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 |  CartyLabs Checkout Customizer |  Checkout B |
|---|---|---|
| Detected stores | Not published | 94 |
| 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 | Not published | Apparel & Accessories, Home & Garden, Electronics |
| Top store countries | Not published | United States, Germany, United Kingdom |
Reviews
| Measure | CartyLabs Checkout Customizer | Checkout B |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 6 |
| New reviews, 28 days | Not enough data | 0 |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | CartyLabs Checkout Customizer | Checkout B |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | No monthly plan listed | $199/month |
| Longest free trial | Not listed | 7 days |
| Plans listed | Not published | 1 |
Listing
| Measure | CartyLabs Checkout Customizer | Checkout B |
|---|---|---|
| Shopify category rank | #130(ahead) | #163 |
| Shopify App Charts | Not on this week’s charts | #8 in Checkout - Other |
| Built for Shopify | No | No |
| Launched | Apr 29, 2026 | Sep 6, 2023 |
| Languages | 1 | 1 |
| Developer | CartyLabs | Checkout Builder |
FAQ
CartyLabs Checkout Customizer and Checkout B: common questions
- What features does each app list that the other doesn’t?
- Checkout B lists 26 the others don’t mention, such as Announcement bar, Checkout upsell, Click-through rates, Conversion rates. 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 May 5, 2026 for CartyLabs Checkout Customizer, Nov 8, 2026 for Checkout B; 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 May 5, 2026 for CartyLabs Checkout Customizer, Nov 8, 2026 for Checkout B. 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.