Top 10 Shopify Bundles inventory Sync Softwares

Selling bundles on Shopify is a smart way to increase average order value, offer curated experiences, and move inventory faster.

But behind the scenes, managing bundle inventory can get messy, especially when Shopify doesn’t automatically sync stock between bundled products and their components.

That’s where bundle inventory sync apps come in.

In this guide, we’ve rounded up the top 10 Shopify apps that help you keep your bundle inventory accurate, up to date, and ready to scale without the manual work.

What Is Bundle Inventory Sync and Why It Matters

Bundle inventory sync ensures that your stock levels stay accurate when you’re selling products made up of multiple components.

In simpler terms, when a bundle is sold, the inventory of its individual items is automatically reduced. And when a component is sold separately or restocked, all related bundles update instantly.

This is critical because Shopify doesn't handle this automatically. Without sync, bundles can appear in stock even if one of the items inside is sold out, leading to overselling, fulfillment delays, and poor customer experience.

For fast-moving eCommerce brands, bundle inventory sync isn’t just a nice-to-have. It’s a must-have for scaling without chaos.

Common Inventory Issues When Selling Bundles on Shopify

Shopify doesn’t natively connect bundled products with their individual components, which means you’re often left juggling stock manually.

Here are some common headaches merchants face:

Overselling Bundles

Without automatic sync, bundles may appear in stock even if a key component is sold out, leading to unfulfillable orders and frustrated customers.

Manual Stock Adjustments

Every time a bundle or component is sold or restocked, you’re forced to update multiple product listings manually. It’s tedious and prone to errors.

Inaccurate Inventory Visibility

It’s tough to get a clear view of what's actually available when bundle and component stock aren't connected. You risk misjudging stock levels and demand.

Fulfillment Delays and Cancellations

Incorrect stock data often leads to last-minute surprises, like discovering a bundle can’t be shipped because one part is missing.

Confusing Reordering Decisions

If bundles and components aren’t linked, it’s easy to reorder the wrong things overstocking some items while missing the ones you truly need.

1. Sumtracker

Sumtracker is a powerful inventory management app built for merchants who sell bundles, kits, or multi-SKU products on Shopify (and beyond).

Unlike basic bundling apps, Sumtracker offers real-time inventory sync between bundles and their components, ensuring that when one item sells, every related bundle updates instantly.

What sets Sumtracker apart is its multi-channel capability. It not only manages bundles on Shopify but also syncs stock across platforms like Amazon, Etsy and eBay, making it perfect for brands selling on multiple storefronts.

Key Features

• Real-time inventory sync across bundles and individual SKUs
• Works with Shopify, Amazon, Etsy, and eBay
• Multi-location support with warehouse transfers
• Low stock alerts, purchase order management, and stock forecasting
• Mobile-optimized for inventory control on the go

Pros

• Accurate bundle sync even across channels and stores
• Clean, intuitive UI that works well on desktop and mobile browsers
• Responsive customer support and fast onboarding

Cons

• No native mobile app (though mobile browser works great)
• Forecasting module is still improving

Pricing

Starts at $49/month, with all core inventory sync features (including bundles) included in the base plan.

2. Simple Bundles

Simple Bundles makes it easy to sell custom kits and gift sets while ensuring component inventory sync. It integrates with Shopify’s fulfillment system and supports both single- and multi-SKU bundles.

Key Features:

• Create fixed or flexible bundles
• Sync inventory between components and bundles
• Supports single-SKU and multi-SKU setups
• Works with Shopify’s native order handling

Pros:

• Very beginner-friendly
• Excellent for curated boxes or simple kits
• Clean UI and good support

Cons:

• Lacks advanced PO and forecasting features
• Not ideal for complex or multi-store setups

Pricing:

Starts at $24/month, with higher-tier plans based on order volume.

3. Bundle Kit

Bundle Kit helps merchants create virtual bundles by linking existing product SKUs. Inventory is automatically adjusted when a bundle is sold, keeping everything accurate without needing duplicate products.

Key Features:

• Virtual bundling using real SKUs
• Compatible with Shopify POS
• Auto inventory adjustments
• Lightweight and fast setup

Pros:

• Easy to use for fixed bundles
• Native Shopify feel
• Great for omnichannel setups

Cons:

• No front-end display customization
• Limited support for mix-and-match bundles

Pricing:

Flat fee of $21/month.

4. NASP Connected Inventory

Connected Inventory is ideal for syncing multiple products to the same inventory pool. It’s best for merchants who sell components individually and within bundles, without needing full-blown inventory software.

Key Features:

• Link multiple SKUs to a single inventory source
• Sync component stock across all listings
• Works well for simple bundles and kits

Pros:

• Minimal learning curve
• Lightweight and effective
• Ideal for duplicate SKUs or simple kits

Cons:

• No PO, forecasting, or analytics features
• Not suited for large catalogs or multi-locations

Pricing:

Free plan available (limited SKUs); paid plans start at $9.99/month.

5. Fast Bundle

Fast Bundle offers an excellent balance between storefront bundle presentation and backend inventory syncing. You can create visual mix-and-match or combo offers while keeping stock levels accurate.

Key Features:

• Mix-and-match, fixed, and combo bundles
• Real-time inventory sync
• Front-end merchandising widgets
• Supports Shopify discounts

Pros:

• Great UX for both admin and customers
• Boosts AOV with flexible bundle types
• Reliable inventory syncing

Cons:

• Slightly more setup time than basic apps
• Front-end widgets may need styling tweaks

Pricing:

Free plan available (for up to 5 bundles); paid plans start at $19/month.

6. Assortion – Bundles & Upsell

Assortion is a great alternative for stores looking to combine bundle creation with upsells and cross-sells. It supports inventory syncing, flexible bundle logic, and works well with Shopify themes.

Key Features:

• Create mix-and-match bundles and volume discounts
• Syncs inventory for bundles and individual SKUs
• Built-in upsell and cross-sell functionality
• Customizable design widgets for storefront display

Pros:

• Great for increasing AOV with synced bundles
• Works out of the box with Shopify
• Clean UI and fast setup

Cons:

• Limited forecasting or PO features
• Slight learning curve for new users

Pricing:

Free plan available; paid plans start at $9.99/month.

7. Rebolt Bundles

Rebolt Bundles is built for flexibility, whether you sell fixed kits or customizable bundles. It supports real-time inventory syncing and works well with Shopify discounts and promos.

Key Features:

• Real-time bundle-component sync
• Mix-and-match and fixed bundle support
• Shopify discount compatibility
• Works with multiple product types

Pros:

• Great for customizable bundles
• Easy to create promotions with bundles
• Accurate inventory sync

Cons:

• Some UI elements feel dated
• No native PO or analytics features

Pricing:

Starts at $19.99/month.

8. Bundles.app – Inventory Bundles

Bundles.app is a trusted Shopify app used by thousands of merchants to manage product bundles with real-time inventory sync. It's ideal for both simple and advanced bundling setups.

Key Features:

• Syncs inventory between bundles and components
• Works with Shopify and Shopify POS
• Supports both fixed and dynamic bundle types
• Lightweight and fast

Pros:

• Stable and battle-tested
• Excellent support for Shopify-native workflows
• Handles large catalogs efficiently

Cons:

• No front-end merchandising tools
• No advanced analytics or forecasting

Pricing:

Starts at $19/month, with a 30-day free trial.

9. Inventory Planner by Sage

Inventory Planner is a forecasting and purchasing tool with built-in bundle inventory logic. It helps merchants understand how bundles affect component demand and plan reorders more intelligently.

Key Features:

• Bundle-to-component mapping
• Demand forecasting
• PO suggestions and planning
• Multi-location inventory support

Pros:

• Excellent for purchasing and planning
• Handles bundle demand accurately
• Great integration with Shopify

Cons:

• More complex to set up
• Expensive for small businesses

Pricing:

Custom-based

10. Craftybase

Craftybase is built for handmade and small-batch makers. It links materials, components, and finished goods using recipes, so when a bundle sells, all raw materials are updated automatically.

Key Features:

• Recipe-based bundle inventory tracking
• COGS calculation and batch tracking
• Supports raw material restocking and planning

Pros:

• Perfect for handmade sellers
• Robust costing and compliance tools
• Syncs production with inventory

Cons:

• Not ideal for high-volume retailers
• Interface is less modern

Pricing:

Starts at $24/month, with advanced features in higher tiers.

Conclusion

Without proper inventory syncing, even simple bundles can cause major headaches like overselling, inaccurate stock counts, and fulfillment delays.

That’s why bundle inventory sync is no longer optional for growing eCommerce businesses.

The right app not only ensures that your bundle and component inventory stay perfectly aligned but also gives you the tools to restock smarter, reduce manual work, and scale with confidence.

Whether you need a lightweight bundling tool or a full-fledged inventory system with forecasting and multichannel support, the apps listed above offer strong solutions for every type of business.

If you’re looking for an all-in-one inventory management solution that’s fast, accurate, and built for multichannel growth, Sumtracker is a great place to start.

FAQs

Does Shopify support automatic inventory syncing for product bundles?

No, Shopify doesn’t natively sync inventory between bundles and their components. You’ll need a third-party app to keep stock levels accurate when selling bundled products.

What happens if I don’t sync bundle inventory properly?

Without proper syncing, bundles may appear in stock even if a component is sold out. This leads to overselling, fulfillment issues, and customer dissatisfaction.

Can I use these bundle apps if I sell on Amazon or Etsy too?

Some apps like Sumtracker support multichannel syncing across platforms like Amazon, eBay, and Etsy, while others (like Simple Bundles) are Shopify-only. Choose based on your selling channels.

What’s the difference between a single-SKU and multi-SKU bundle?

A single-SKU bundle is treated as one product in your system, while a multi-SKU bundle is made up of multiple products (SKUs). Good bundle apps support both and manage inventory accordingly.

Which app is best for handmade or custom products?

Craftybase is a great option for handmade sellers. It tracks raw materials and finished goods using recipes, updating inventory for bundles and components automatically.

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