Side-by-side comparison · 24 data points
Validate checkout, add payment, shipping & discount rules, checkout blocks & post-purchase upsells
| SMART Checkout Rules & Upsells | Upsell Engine by Square | |
|---|---|---|
| Tagline | ||
| Description | ||
| Screenshots | images | images |
| Languages | ||
| Platforms | ||
| Developer |
Create custom deals with bundles, BOGOs, volume discounts, free gifts and high-converting upsells.
| Metric | SMART Checkout Rules & Upsells | Upsell Engine by Square |
|---|---|---|
| Rating | 5.0 ★ | 5.0 ★ |
| Total reviews | ★ 725 | 3 |
| Free plan | Yes | Yes |
| Pricing | Free plan available | Free |
| Built for Shopify | ★ Yes | — |
| Listed features | 5 | 5 |
| Featured placements | 3 | — |
| Languages | 18 supported | 16 supported |
| Listed since | Sep 2024 | Jul 2025 |
SMART Checkout Rules & Upsells and Upsell Engine by Square are evenly matched on rating (5.0★ vs 5.0★) — the differentiator comes down to pricing fit, feature breadth, and which app's interaction pattern suits your team's workflow.
Pricing entry tiers: SMART Checkout Rules & Upsells at Free plan available, Upsell Engine by Square at Free. Check each app's tier structure for the capacity limits you actually need before deciding — the headline number is the same shape, but the gating shape per tier (seats, usage volume, integrations) varies.
SMART Checkout Rules & Upsells has the larger user base (725 reviews vs 3), which usually maps to broader integration coverage, faster bug-fix cadence, and a deeper bench of community workflow patterns. Upsell Engine by Square's smaller cohort can be an advantage for niche workflows where the bigger app has accumulated bloat.
Recommended evaluation path: install both apps' free tiers (where available) and run them in parallel on a small cohort for 7-14 days before committing. The data tables below show the per-feature breakdown — for most merchants the deciding factor will be a single integration or workflow detail that's hard to compare from listing pages alone.
This verdict is generated from the live marketplace data on this page — rating, review count, pricing tier, and category position all refresh from the canonical Shopify App Store listing every 24 hours. AppRanks does not accept payment to influence comparison outcomes; the methodology is documented on the About page and applies identically to every pair on the site.
Read each app's audit: SMART Checkout Rules & Upsells audit • Upsell Engine by Square audit
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| Last updated | — | — |
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| Keyword | SMART Checkout Rules & Upsells | Upsell Engine by Square |
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| upsell quiz | #31 | #238 |
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Both SMART Checkout Rules & Upsells and Upsell Engine by Square offer paid plans only. SMART Checkout Rules & Upsells starts at Free plan available; Upsell Engine by Square starts at Free. Compare the per-tier features in the Pricing section above before committing.
SMART Checkout Rules & Upsells (5.0★, 725 reviews) and Upsell Engine by Square (5.0★, 3 reviews) are essentially tied on rating. Look at review velocity and individual reviewer quotes — both visible on each app's detail page — to differentiate.
AppRanks cannot separate these two on rating — both sit at 5.0★. SMART Checkout Rules & Upsells does carry the larger published review base (725 vs 3). Read both apps' detail pages for the feature breakdown and recent listing changes.
Both apps are one-click installs from the Shopify App Store. SMART Checkout Rules & Upsells has the deeper published review base (725 vs 3), which often — though not always — accompanies better-tested setup docs. AppRanks doesn't measure setup time directly: read the recent reviews on each app's detail page for user-reported install experience.
SMART Checkout Rules & Upsells typically suits early-stage and growth-mode teams based on its published review base (725 reviews). Upsell Engine by Square typically suits early-stage and growth-mode teams based on its published review base (3 reviews). A larger review base generally means the app has been exercised at scale — relevant if you are processing high volume or handling enterprise compliance requirements.
Migration support varies by app and category. SMART Checkout Rules & Upsells and Upsell Engine by Square both publish their export options on their marketplace listing pages (or in their support docs); some apps offer one-click import from competitors, others require CSV. The fastest check: search "import from Upsell Engine by Square" in each app's help center. AppRanks does not track migration tooling directly — this is a category-specific capability worth verifying before commitment.
