Stackable vs Pumper Bundles
Pumper Bundles carries the largest review count of any app in our research, 3,026 reviews at a 4.9 rating. Here's what it does well, what reviewers report about reliability at peak, and where a server-side approach fits instead.
Free plan available. No card required.
Stackable vs Pumper Bundles
| Compare | Stackable | Pumper |
|---|---|---|
| Rating | New app on the Shopify App Store | 4.9 (3,026 reviews) |
| Free tier | 2 live campaigns, no card required | Free up to $300 in generated revenue |
| Paid pricing | $9.99 / $19.99 / $49.99 | $9.99 / $29.99 / $49.99 |
| Pricing model | Feature-based only, campaign count | Revenue-generated tiers |
| Notable strength | Server-side checkout parity | Bundle-builder UX, post-purchase upsell |
| BFCM reliability | Same server-side engine at any traffic level | Reviewers report the app breaking during Black Friday peak |
| Stacking control | Explicit combine rule per offer | Reviewers report duplicate or deactivated discounts applying to live orders |
| SEO-safe widgets | Renders div/span/table only, never heading tags | A reviewer reported prices rendered as heading tags on product pages |
Ratings and pricing as listed on the Shopify App Store at time of writing; verify current listings.
Pumper Bundles' 3,026 reviews at 4.9 is the largest, best-rated install base of the apps in our research. That reflects:
- A well-liked bundle-builder UX.
- Post-purchase, one-click upsell.
- Page-builder and cart-drawer integrations aimed at lifting AOV.
Reviewers on the Shopify App Store report a few recurring issues worth knowing before you install:
- Duplicate or deactivated discounts applying to live orders.
- The app breaking specifically during Black Friday / Cyber Monday peak traffic, described by one reviewer as "out of nowhere" and costly.
- At least one reviewer reported prices rendered as heading tags, creating multiple competing H1 elements on product pages, an SEO issue support reportedly declined to fix.
- Some reviewers describe aggressive emails pressuring them to change negative reviews.
When Pumper Bundles is fine
Pumper Bundles is a reasonable choice if:
- Your priority is bundle-led AOV with a strong post-purchase upsell flow.
- You're comfortable with pricing that rises as the app generates more revenue for you.
- A large, well-rated install base (3,026 reviews) matters more to you than the specific BFCM and stacking reports above.
When you need Stackable
Consider Stackable if you specifically need:
- A discount engine built to hold up at Black Friday / Cyber Monday peak traffic without client-side hacks.
- Explicit stacking rules, so duplicate or unwanted discount combinations cannot slip through.
- Storefront widgets that never inject heading tags, protecting your product-page SEO.
- Pricing that never takes a percentage of the revenue you generate.
Common questions
Is Pumper Bundles unreliable?
It holds a 4.9 rating across 3,026 reviews, the largest and best-rated install base we researched. The reviewer reports above, particularly around Black Friday peak traffic and duplicate discounts, are real and worth weighing, but they coexist with a strong overall track record.
Does Stackable do bundles like Pumper?
Not yet. Pumper's bundle-builder and post-purchase upsell flow are more mature today. Stackable focuses on volume, quantity-break, BOGO, and scheduled-sale logic with server-side checkout parity.
What does "SEO-safe widgets" actually mean?
Stackable's storefront widgets render as div, span, and table elements only, never heading tags (h1-h6). A Pumper reviewer reported the opposite: prices rendered as heading tags, creating extra H1 elements competing with the actual product-page H1.
Related features
Bundles
Fixed-price Shopify bundles today mean a static bundle product: a fixed list of specific variants at a fixed price that breaks the moment your catalog changes. Stackable is building bundles that stay in sync with the collections and tags that define them instead. Ships shortly after launch.
Scheduled Sales
Shopify scheduled sales fail two ways in the wild: campaigns that silently never start, and live campaigns with no pause button. Stackable's scheduler runs on the same reliability guarantee as its checkout math, and pausing takes effect storefront-wide in under a minute.
Discount Stacking
How to stack discounts in Shopify comes down to settings the platform hides by default: every discount belongs to a class (product, order, or shipping), and whether two discounts combine is decided per offer, per class. Stackable puts those combine switches on every offer, so a volume tier, a spend goal, and free shipping add up exactly the way you configured them, every time.
Install Stackable and see the difference
Try it on your own store and compare against Pumper Bundles directly.
Free plan available. No card required.