Checkout Engine vs Post Purchase Upsell—ReSell
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026 for Checkout Engine, Nov 8, 2026 for Post Purchase Upsell—ReSell.
The short answer
- On the Shopify App Store: Checkout Engine 5.0 from 1 reviews and Post Purchase Upsell—ReSell 5.0 from 71 reviews.
- Only Checkout Engine lists a free plan. Paid plans start at $7.99/month for Checkout Engine and $0.99/month for Post Purchase Upsell—ReSell.
- Checkout Engine lists 12 features Post Purchase Upsell—ReSell’s listing doesn’t mention, including Bundles, Cart drawer, Cart upsell.
Head to head
- United States
- United Kingdom
- Australia
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Sandbox
- · All features
- · Checkout Upsell Blocks
- · Hide / Rename / Reorder Payment Methods
- · Hide / Rename / Reorder Shipping Methods
- · Product Order Volume Shipping Discount
- · Rule-based Discount
Basic Plan
- · Chat & Email Support
- · Hide/Rename/Reorder Payment Methods
- · Hide/Rename/Reorder Shipping Methods
- · Order Discount
- · Product Discount
- · Shipping Discount
Advanced Plan
- · All features of Basic Plan
- · Analytics
- · Chat & Email Support
- · Checkout Branding
- · Checkout Upsell Block
- · Custom fields & blocks
Flex
- · 100 store orders free/mo
- · 24/7 chat, email, phone & video calls
- · 5% on upsell revenue
- · Free cart upsell add-on
Standard
- · 24/7 chat, email, phone & video calls
- · 250 store orders included/mo
- · Commission-free upsells
- · Free cart upsell add-on
- · Then $0.20 per order
Professional
- · 1,000 store orders included/mo
- · 24/7 chat, email, phone & video calls
- · Commission-free upsells
- · Free cart upsell add-on
- · Then $0.20 per order
Unlimited
- · 24/7 chat, email, phone & video calls
- · Commission-free upsells
- · Free cart upsell add-on
- · Lifetime price lock
- · No usage charges ever
- · Unlimited store orders
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCheckout Engine is a comprehensive checkout solution that helps you personalize your customer’s shopping experience. It gives you complete control over the checkout process, allowing you to manage payment and shipping methods. With checkout engine, you can upsell the products, customize discounts, manage the visual branding, and personalize minute details to fuel sales at key conversion points.
Get an ultimate sales boost by reconverting buyers after payment: a post purchase offer before the thank you page, upsell bundles on the checkout page, upsell & cross sell with related products and recommended products. A post checkout upsell and order status page upsell keep selling, and a multi-product downsell follows a declined offer.
- Increase revenue & average order value with upsell & product recommendation.
- Increase conversion with free shipping upsells & dynamic content to build trust.
- Add custom fields to checkout page for social links and payment icons.
- Hide, rename and reorder delivery and payment methods using Shopify Functions.
- Checkout and post-purchase one click upsell and automatic cross-sell offers
- Offer customers to make a new purchase with Thank you page upsell promotions
- Upselling and cross-selling widgets to improve your checkout and Thank you page
- Personalized recommendations or products that are frequently bought together
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 Engine |  Post Purchase Upsell—ReSell |
|---|---|---|
| Detected stores | Not published | 51 |
| 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, Health & Beauty |
| Top store countries | Not published | United States, United Kingdom, Australia |
Reviews
| Measure | Checkout Engine | Post Purchase Upsell—ReSell |
|---|---|---|
| App Store rating | 5.0 ★ | 5.0 ★ |
| App Store reviews | 1 | 71(ahead) |
| New reviews, 28 days | 0 | 1(ahead) |
| Reviewers a year or more in | Not enough data | 32% |
Pricing
| Measure | Checkout Engine | Post Purchase Upsell—ReSell |
|---|---|---|
| Free plan | Yes | Not listed |
| Lowest paid monthly plan | $7.99/month | $0.99/month(ahead) |
| Longest free trial | 15 days | 30 days |
| Plans listed | 3 | 4 |
Listing
| Measure | Checkout Engine | Post Purchase Upsell—ReSell |
|---|---|---|
| Shopify category rank | #278 | #90 |
| Shopify App Charts | Not on this week’s charts | #20 on Featured by Shopify in Upsell and cross-sell |
| Built for Shopify | No | Yes |
| Launched | Nov 18, 2022 | Jun 28, 2022 |
| Languages | 1 | 4 |
| Developer | Script Engine | DevIT |
FAQ
Checkout Engine and Post Purchase Upsell—ReSell: common questions
- Is Checkout Engine or Post Purchase Upsell—ReSell cheaper?
- Only Checkout Engine lists a free plan. Paid plans start at $7.99/month for Checkout Engine and $0.99/month for Post Purchase Upsell—ReSell. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- Which has better reviews, Checkout Engine or Post Purchase Upsell—ReSell?
- On the Shopify App Store: Checkout Engine 5.0 from 1 reviews and Post Purchase Upsell—ReSell 5.0 from 71 reviews.
- What features does each app list that the other doesn’t?
- Checkout Engine lists 12 the others don’t mention, such as Bundles, Cart drawer, Cart upsell, Click-through rates. Post Purchase Upsell—ReSell lists 2 the others don’t mention, such as A/B testing, Frequently bought together. 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 Oct 13, 2026 for Checkout Engine, Nov 8, 2026 for Post Purchase Upsell—ReSell; 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 Oct 13, 2026 for Checkout Engine, Nov 8, 2026 for Post Purchase Upsell—ReSell. 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.