If you're a Shopify merchant trying to increase your average order value (AOV), product bundling is one of the most proven tactics available. And when it comes to bundling apps, two names keep coming up: Kaching Bundle Quantity Breaks and Rapi Bundle Quantity Breaks. Both are featured in Shopify's own blog roundup of the best bundle apps, and both have earned thousands of five-star reviews.

But they are not the same app. If you're trying to decide between the two, this head-to-head comparison will break down exactly what each one offers, where they differ, and which one delivers more value for serious Shopify merchants.

What Is Kaching Bundle Quantity Breaks?

Kaching Bundle Quantity Breaks, built by Kaching Appz, is a well-established Shopify bundle app with a strong reputation for clean design and reliable performance. It focuses on helping merchants create quantity break offers, volume discounts, and product bundles that display beautifully on product pages. The app has earned a near-perfect rating from over 1,600 reviewers on the Shopify App Store and is frequently cited as one of the most polished bundling tools available.

Key features include customizable bundle widgets, BOGO deals, mix-and-match options, volume-based pricing, a built-in analytics dashboard, and A/B testing to help merchants optimize their offers. The app is known for its "Built for Shopify" badge, meaning it meets Shopify's highest standards for performance, design, and integration.

Pricing starts at $14.99 per month for the Starter plan (up to $1,000 in additional bundle revenue), $29.99 per month for Scale (up to $5,000), and $59.99 per month for the Pro plan (unlimited revenue). Development stores can use the app free. A 14-day free trial is available on paid plans, and annual billing saves between 25% and 33%.

What Is Rapi Bundle Quantity Breaks?

Rapi Bundle Quantity Breaks (now also branded as Rapi Bundles & Upsells), built by Rapi Apps, is a fast-growing competitor that has quickly earned a 5-star rating from thousands of users. Like Kaching, it is featured in

app roundup and carries the "Built for Shopify" badge.

Where Rapi Bundle differentiates itself is in the breadth of features it packs in, especially at its free tier. Beyond standard bundles and quantity breaks, Rapi includes post-purchase upsells, advanced A/B testing, an AI-powered bundle builder, AI-generated text and image suggestions for offers, detailed analytics, progress bar bundles, subscription bundles, and deep integration with popular Shopify page builders. Merchants consistently describe it as the most customizable bundling app they have used.

Rapi offers a free plan, making it accessible to merchants at any stage. Paid plans are available with additional features and priority support.

Feature-by-Feature Comparison

Bundle Types

Both apps support the core bundle types that Shopify merchants need: quantity breaks, volume discounts, BOGO (Buy One Get One Free), mix-and-match bundles, tiered pricing, and frequently bought together offers. Rapi also adds subscription bundles, free gift bundles, and combo bundles, giving it a wider range of promotional formats in a single app.

A/B Testing

Both Kaching and Rapi include built-in A/B testing, which is a significant advantage over most bundling apps that skip this feature entirely. However, Rapi's A/B testing capabilities are more advanced, allowing merchants to test bundles against a broader range of variables including different offer structures, not just layout or styling variations. For data-driven merchants who want to optimize beyond aesthetics, Rapi goes deeper.

Analytics

Kaching provides a solid analytics dashboard that tracks additional revenue generated by bundle offers, giving merchants a clear view of their app's impact. Rapi goes further with more granular analytics, allowing merchants to track individual bundle performance, conversion rates, upsell acceptance rates, and AOV improvements with greater detail. If you want to understand not just how much your bundles are earning but exactly why, Rapi's analytics layer gives you more to work with.

Post-Purchase Upsells

This is one of the clearest differentiators between the two apps. Rapi includes post-purchase upsells built directly into the platform, allowing merchants to present an additional offer to a customer immediately after they complete a purchase, before they leave the store. This is one of the highest-converting upsell touchpoints in e-commerce, and having it natively integrated means you don't need a separate app. Kaching does not offer post-purchase upsells as part of its feature set.

AI-Powered Features

Rapi includes an AI bundle builder that can suggest optimal product combinations based on your catalog, along with AI-generated text and image content for your bundle offers. This dramatically reduces the time it takes to set up compelling promotions and helps merchants who may not have dedicated copywriting or design resources. Kaching does not currently offer AI-powered content generation or bundle suggestion tools.

Customization and Design

Both apps are no-code and offer significant visual customization. Kaching is frequently praised for its clean, polished design output and has an intuitive styling interface. Rapi is described by many reviewers as the most customizable bundling app available, with color swatches, multiple layout options, and deep compatibility with third-party page builders like GemPages and PageFly, as well as popular side-cart apps.

Pricing

Kaching has no functional free plan for live stores (the free tier is for development stores only). Paid plans start at $14.99 per month. Rapi offers a genuine free plan with real features, making it accessible to new or budget-conscious merchants. For stores that want to test bundling seriously before committing to a monthly fee, Rapi has the clear advantage here.

Ease of Use

Both apps are highly rated for ease of setup. Neither requires coding. Users of both apps consistently describe a fast onboarding process, with bundles live within minutes of installation. This is a draw.

Customer Support

Both Kaching and Rapi receive outstanding reviews for their customer support teams. Response times are fast, agents are knowledgeable, and both teams are willing to handle custom CSS or configuration adjustments for merchants. This is also a draw.

Shopify Integration

Both apps carry the "Built for Shopify" badge, meaning they meet Shopify's highest standards for performance, speed, and theme compatibility. Neither app has been reported to cause checkout conflicts or slow down store performance.

Side-by-Side Summary

Who Should Use Kaching Bundle?

Kaching Bundle is a great choice for dropshippers and begginers who prioritize design polish and want a reliable, time-tested app with a clean interface. If you run a store that generates consistent bundle revenue and you want a straightforward plan structure, Kaching delivers. It is especially strong for merchants who have already validated their bundling strategy and want a dependable tool to scale it. The A/B testing and analytics dashboard are solid for day-to-day optimization.

That said, if you want the full toolkit, including post-purchase upsells, AI tools, and deeper analytics, you will need to supplement Kaching with additional apps, which adds cost and complexity.

Who Should Use Rapi Bundle?

Rapi Bundle is the better choice for DTC brands and advanced dropshippers who want maximum capability from a single app. Whether you are just starting out (free plan), running a growing store, or operating at scale, Rapi covers the full funnel: pre-purchase bundles, in-cart upsells, post-purchase upsells, subscription offers, and AI-driven optimization. The more detailed analytics give you insight into what is actually driving conversions, and the advanced A/B testing lets you refine those offers with precision.

The addition of AI-generated text and images is a genuine time-saver, particularly for merchants managing large catalogs or running frequent promotions. The fact that all of this comes with a free entry point makes Rapi one of the best-value bundling apps on the Shopify App Store.

The Verdict: Rapi Bundle Wins

Both Kaching and Rapi are excellent apps that have legitimately helped thousands of Shopify merchants increase their average order value. If you already use Kaching and it is working well for you, there is no urgent reason to switch.

But if you are choosing for the first time, or evaluating whether to upgrade your current setup, Rapi Bundle is the overall winner.

It does everything Kaching does, and then goes further with post-purchase upsells, more detailed analytics, advanced A/B testing, AI-powered bundle suggestions, and AI text and image generation. It also offers a genuine free plan for live stores, making it accessible regardless of your budget. The "Built for Shopify" certification means you get the same quality bar as Kaching without the mandatory subscription cost to get started.

For merchants who want one app that covers every stage of the upsell funnel with smarter tools and deeper data, Rapi Bundle Quantity Breaks is the clear choice in 2026.

Frequently Asked Questions

Is Rapi Bundle really free? Yes. Rapi Bundle offers a functional free plan for live Shopify stores, not just development environments. You can set up bundles, quantity breaks, and promotions without paying a monthly fee.

Does Kaching Bundle have a free plan? Kaching's free tier is limited to development stores. Live stores need a paid plan starting at $14.99 per month.

Which bundle app has better A/B testing? Both apps include A/B testing, but Rapi's implementation is more advanced, offering broader testing variables beyond basic layout or color changes.

Does Rapi Bundle work with post-purchase upsells? Yes. Rapi Bundle includes native post-purchase upsell functionality, allowing you to present offers to customers immediately after checkout.

Are both apps featured by Shopify? Yes. Both Kaching Bundle Quantity Breaks and Rapi Bundle Quantity Breaks are featured in Shopify's official blog roundup of the best bundle apps, and both carry the "Built for Shopify" badge.

Which app has better analytics? Rapi Bundle offers more granular analytics, including individual bundle performance tracking, upsell acceptance rates, and detailed AOV reporting. Kaching's dashboard is solid but less detailed.

Last updated: April 2026. App features and pricing are subject to change. Always verify current details on the Shopify App Store.