OfferEngine by Vasta vs AMP Post Purchase Upsell
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 OfferEngine by Vasta, Nov 9, 2026 for AMP Post Purchase Upsell.
The short answer
- On the Shopify App Store: OfferEngine by Vasta 5.0 from 2 reviews and AMP Post Purchase Upsell 5.0 from 94 reviews.
- Both list a free plan. Paid plans start at $39/month for OfferEngine by Vasta and $99/month for AMP Post Purchase Upsell.
- AMP Post Purchase Upsell lists 13 features OfferEngine by Vasta’s listing doesn’t mention, including Announcement bar, 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.
Free
- · ONLY For Partner Stores & In Development
Growth
- · A/B testing
- · Global segment flows
- · Personalization
- · Up to 500 orders/month
Pro
- · A/B/C/D testing
- · Advanced funnels
- · Full merchandising controls
- · Up to 1,000 orders
Scale
- · Multivariate testing
- · Scale volume
- · Subscription upsells
- · Up to 2,500 orders/month
Enterprise
- · All premium features
- · Priority onboarding and support
- · Unlimited orders/month
FREE FOREVER
- · A/B Testing to pick best offer
- · Advanced targeting: UTM, repeat visitor
- · Design & branding support
- · SKU & campaign level analytics
- · Smart AI recommendations
- · Unlimited Post Purchase Upsells
PRO
- · All features in FREE plan
- · Checkout page upsells for Shopify Plus
- · Pop-ups on ATC or Checkout button clicks
- · Post purchase surveys and analytics
- · Product Page Upsells
- · Slide cart drawer with upsells
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureOfferEngine displays targeted product offers right after checkout, when customers are most ready to buy again. Build visual upsell funnels with a no-code editor, set trigger rules by product, category, or all orders, and run A/B tests to find the best-converting offer. Every accepted upsell is added to the original order with a custom discount, no extra payment step required.
AMP Post Purchase Upsell turns every order into a bigger order. Show a one-click post purchase upsell where buying intent is highest. Add product page upsells and pop-ups, and on Shopify Plus, add checkout upsells with a free-shipping progress bar. Use one-click add-ons, frequently bought together recommendations & cross-sell offers across the journey.
- Visual Funnel Builder - design multi-step upsell flows with no code required
- Smart Triggers - target offers by product, segment, or all orders
- A/B Testing - run two deals variants and scale the one that converts most
- Create Post Purchase One-Click Upsells (single & multi-product)
- Upsell everywhere: Product page, Cart, Thank You page
- Supercharge Checkout page with upsells and social proof (Shopify Plus Exclusive)
- Customize Thank You & Order Status page: Upsells, Surveys & more
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 |  OfferEngine by Vasta | AMP Post Purchase Upsell |
|---|---|---|
| Detected stores | Not published | 537 |
| Net store change, 28 days | 0 | −12 |
| Stores added, 28 days | Not enough data | 2 |
| Big-brand share | Not enough data | 32% |
| Top store categories | Not published | Apparel & Accessories, Health & Beauty, Home & Garden |
| Top store countries | Not published | United States, United Kingdom, Australia |
Reviews
| Measure | OfferEngine by Vasta | AMP Post Purchase Upsell |
|---|---|---|
| App Store rating | 5.0 ★ | 5.0 ★ |
| App Store reviews | 2 | 94(ahead) |
| New reviews, 28 days | Not enough data | 0 |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | OfferEngine by Vasta | AMP Post Purchase Upsell |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $39/month(ahead) | $99/month |
| Longest free trial | Not listed | 14 days |
| Plans listed | 5 | 2 |
Listing
| Measure | OfferEngine by Vasta | AMP Post Purchase Upsell |
|---|---|---|
| Shopify category rank | #424 | #186(ahead) |
| Shopify App Charts | Not on this week’s charts | #3 on Big-brand picks in Upsell and cross-sell |
| Built for Shopify | No | No |
| Launched | Jun 29, 2026 | Jul 21, 2023 |
| Languages | 1 | 1 |
| Developer | Vasta Inc | App HQ Pte. Ltd. |
FAQ
OfferEngine by Vasta and AMP Post Purchase Upsell: common questions
- Is OfferEngine by Vasta or AMP Post Purchase Upsell cheaper?
- Both list a free plan. Paid plans start at $39/month for OfferEngine by Vasta and $99/month for AMP Post Purchase Upsell. 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, OfferEngine by Vasta or AMP Post Purchase Upsell?
- On the Shopify App Store: OfferEngine by Vasta 5.0 from 2 reviews and AMP Post Purchase Upsell 5.0 from 94 reviews.
- What features does each app list that the other doesn’t?
- OfferEngine by Vasta lists 2 the others don’t mention, such as Priority processing, Warranties. AMP Post Purchase Upsell lists 13 the others don’t mention, such as Announcement bar, Cart drawer, Cart upsell, Custom CSS. 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 OfferEngine by Vasta, Nov 9, 2026 for AMP Post Purchase 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 Oct 13, 2026 for OfferEngine by Vasta, Nov 9, 2026 for AMP Post Purchase 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.