Rapid Bundles & Upsell app vs STAKK ‑ Volume Bundles & More
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 7, 2026 for Rapid Bundles & Upsell, Jul 18, 2026 for STAKK.
The short answer
- On the Shopify App Store: Rapid Bundles & Upsell 5.0 from 1,616 reviews and STAKK 5.0 from 1 reviews.
- Only STAKK lists a free plan. Paid plans start at $15/month for Rapid Bundles & Upsell and $19/month for STAKK.
- Rapid Bundles & Upsell lists 44 features STAKK’s listing doesn’t mention, including A/B testing, Analytics, Automations.
Head to head
- United States
- France
- United Kingdom
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Forever free
- · A/B testing
- · Basic support
- · Build your own box (BYOB)
- · Bundle Subscription
- · Combo Bundle & Mix and match
- · Unlimited bundles & Post purchase upsell
Starter
- · 24/7 chat & email support
- · A/B testing & Color swatch
- · Build your own box (BYOB)
- · Color swatch, Free gifts & Upsells
- · Mix and match different products
- · Progress bar & price rounding
Pro
- · 24/7 chat & email support
- · Advanced A/B testing & Color swatch
- · Build your own box (BYOB)
- · Mix and match different products
- · Mix and match different products
- · Progress bar & price rounding
Elite
- · API and MCP
- · Advanced A/B testing with AI
- · Entreprise custom features
- · Exclusive support 7/7
- · Unlimited revenue generated and features
Free
- · 1 active bundle
- · Basic analytics
- · Theme app block widget
- · Volume discounts only
Growth
- · All 3 bundle types
- · Custom branding
- · Standard analytics
- · Unlimited bundles
Pro
- · Advanced analytics
- · Built-in A/B testing
- · Everything in Growth
- · Post-purchase upsell
- · Priority support
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureA/B test your product bundles deals, quantity discount, BOGO (Buy One Get One FREE), upsells, subscription bundles, tiered pricing, Volume discount, progress bar bundles, tiered discount, Bundle & Bulk, frequently bought together & Quantity Breaks.
STAKK Bundles helps merchants sell more per visit by combining proven bundle types with built-in A/B testing. Run volume discounts, mix-and-match bundles, and fixed routines on any product page, then test variants head-to-head and let STAKK declare the winner.
- Boost your profit with bundles, cross-sell, sweet upsells, coupon & BOGO offers
- No-coding required Chose you products, add bundles, volume discounts & publish
- Integrates with any theme. Select your product, add quantity breaks & publish
- Full customization: block size, colors, Text type, block background, font style
- Three bundle types: volume discounts, mix-and-match, and fixed routines
- Built-in A/B testing with automatic winner declaration
- Discounts apply natively at checkout via Shopify Functions
- Theme app block widget — one-click install, clean uninstall
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 |  Rapid Bundles & Upsell |  STAKK |
|---|---|---|
| Detected stores | 2,394 | Not published |
| Net store change, 28 days | −25 | 0 |
| Stores added, 28 days | 55 | Not enough data |
| Big-brand share | 7% | Not enough data |
| Top store categories | Health & Beauty, Apparel & Accessories, Home & Garden | Not published |
| Top store countries | United States, France, United Kingdom | Not published |
Reviews
| Measure | Rapid Bundles & Upsell | STAKK |
|---|---|---|
| App Store rating | 5.0 ★ | 5.0 ★ |
| App Store reviews | 1,616(ahead) | 1 |
| New reviews, 28 days | 31 | Not enough data |
| Reviewers a year or more in | 4% | Not enough data |
Pricing
| Measure | Rapid Bundles & Upsell | STAKK |
|---|---|---|
| Free plan | Not listed | Yes |
| Lowest paid monthly plan | $15/month(ahead) | $19/month |
| Longest free trial | 7 days | 7 days |
| Plans listed | 4 | 3 |
Listing
| Measure | Rapid Bundles & Upsell | STAKK |
|---|---|---|
| Shopify category rank | #3 | Not enough data |
| Shopify App Charts | #1 in Upsell and bundles - Other | Not on this week’s charts |
| Built for Shopify | Yes | No |
| Launched | Jan 3, 2022 | May 11, 2026 |
| Languages | 1 | 1 |
| Developer | Rapid Bundle | Upsells | Cart Drawer | Subscriptions | STAKK Software |
FAQ
Rapid Bundles & Upsell and STAKK: common questions
- Is Rapid Bundles & Upsell or STAKK cheaper?
- Only STAKK lists a free plan. Paid plans start at $15/month for Rapid Bundles & Upsell and $19/month for STAKK. 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, Rapid Bundles & Upsell or STAKK?
- On the Shopify App Store: Rapid Bundles & Upsell 5.0 from 1,616 reviews and STAKK 5.0 from 1 reviews.
- What features does each app list that the other doesn’t?
- Rapid Bundles & Upsell lists 44 the others don’t mention, such as A/B testing, Analytics, Automations, Banners. STAKK lists 6 the others don’t mention, such as Automatic discounts, Bulk discounts, Buy more, save more, Custom styles. 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 7, 2026 for Rapid Bundles & Upsell, Jul 18, 2026 for STAKK; 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 7, 2026 for Rapid Bundles & Upsell, Jul 18, 2026 for STAKK. 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.