CartBoost: Checkout Upsell vs XB: Post Purchase Upsell
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 4, 2026 for CartBoost, Oct 30, 2026 for XB.
The short answer
- Only CartBoost lists a free plan.
- CartBoost lists 4 features XB’s listing doesn’t mention, including Click-through rates, Free gifts, Free shipping.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · 1-Click checkout order bump
- · Checkout milestone progress bar
- · Native Checkout Extensibility
- · Standard email support
Pro
- · 1-Click post-purchase upsells
- · Multi-tier milestone rewards
- · Priority developer support
- · Unlimited checkout orders
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCartBoost helps merchants increase Average Order Value directly within Shopify checkout. Set dynamic milestone reward progress bars for free shipping and gift tiers that update live with cart totals. Offer high-converting 1-click checkout order bumps and post-purchase upsells with zero checkout friction. Built 100% natively on Checkout Extensibility with no theme code injection or slow scripts.
Boost your Average Order Value in minutes with Xboost's One-Click Post-Purchase upsells. After purchase, show irresistible offers shoppers can accept in One Click, no re-entering payment info needed. Create precise targeting rules, offer multiple products at once, track your success on our analytics dashboard and customize widgets to perfectly match your brand. Install now and start growing your revenue!
- Checkout progress bar with tiered milestone rewards
- One-click order bumps placed directly inside native checkout
- Post-purchase 1-click upsells displayed right after payment
- Visual checkout customizer block with live admin simulator
- Create post purchase one-click upsell offers (single & multi-product)
- Personalize offers with targeting rules: products & more.
- Customize upsell offers to match your brand and store style.
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 |  XB | |
|---|---|---|
| Detected stores | Not published | 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 | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | XB | |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 7 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
FAQ
CartBoost and XB: common questions
- Is CartBoost or XB cheaper?
- Only CartBoost 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?
- CartBoost lists 4 the others don’t mention, such as Click-through rates, Free gifts, Free shipping, Priority processing. XB lists 1 the others don’t mention, such as Product recommendations. 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 4, 2026 for CartBoost, Oct 30, 2026 for XB; 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 4, 2026 for CartBoost, Oct 30, 2026 for XB. 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.