Kit Builder is the BigCommerce app built for product kits and bundles. It automatically subtracts component stock on every bundle sale, syncs inventory in real time, and eliminates overselling — no spreadsheets, no manual fixes.
The Problem
The Solution
Kit Builder was built specifically for BigCommerce kitting and bundling. It sits between your component stock and your bundle products, watching every sale and edit, and keeps everything accurate — automatically.
How It Works
Three simple steps and Kit Builder takes over the inventory work.
Choose any existing BigCommerce product to be your kit. No need to create anything from scratch — just identify it inside Kit Builder and it's ready to configure.
Search for the component products by name or SKU and set how many go into each kit. Add as many components as you need, include assembly notes, and set up interactive options so shoppers can choose variants like size, color, or flavor.
When a kit sells, the component stock is automatically subtracted. The kit's available quantity is recalculated in real time. Sales, manual edits, returns, and webhook updates all trigger instant re-syncs — nothing gets out of date.
Features
Purpose-built for BigCommerce merchants who sell product bundles, kits, gift sets, and custom kitting configurations.
Every time a kit sells, the right amount of each component is subtracted from stock immediately — no manual work needed.
Kit availability is recalculated instantly after every sale, stock edit, or return. What you see in BigCommerce is always accurate.
Customers can choose the variant of each component in a kit — such as size, colour, or other options — while you control exactly which variants are available. Inventory is tracked and deducted per the exact variant selected.
See every kit that needs to be packed. Expand each kit to view its components and assembly notes — your team always knows what to build and ship.
Kit Builder pushes the real "Total Available" number to each kit SKU in BigCommerce — so you never sell more than you can actually build.
In this mode, kit components are added directly to the customer's order alongside the kit — giving full visibility of what was included in each purchase.
The Kits screen highlights kits with low component stock at a glance — so you can reorder the right parts before you run out, not after.
Add packing instructions, assembly requirements, or special handling notes to each kit. Staff see them during fulfillment — no guesswork, no mistakes.
Define a pricing formula based on total component prices — Kit Builder calculates and sets the kit's sale price automatically, keeping your margins consistent.
Kit Builder works across all your BigCommerce storefronts. Manage kits and bundles from a single app instance — inventory sync and component rules apply consistently no matter which storefront a customer buys from.
Show a list of kit components directly on the product page, cart, and checkout — so customers always know exactly what's included. Choose which fields to display (image, title, SKU, brand, quantity), control where the list is injected using CSS selectors, and fully style it with custom CSS classes.
Who It's For
Kit Builder's kitting and bundling engine works across every industry and bundle type on BigCommerce.
Bundle related products into seasonal or themed gift sets without worrying about inventory tracking.
Package required parts together with precise quantities for technicians and trade buyers.
Create wine cases, sample boxes, or flavour packs — and let customers choose their own mix.
Sell outfit combinations with size and colour options across each component in the bundle.
Build supplement stacks, starter kits, or monthly subscription boxes with variable products.
What Merchants Say
"This app has fundamentally changed how we use BigCommerce. It allows true kit level configuration and visibility, with clean data flowing into our ERP and customer care systems. For any business using bundles or kits and needing accurate, system wide data, I highly recommend Kit Builder. It fills a critical gap and does it exceptionally well."
"We have been using this now for a week and are absolutely blown away with the results. We have reduced a huge amount of overstocks, gained a ridiculous amount of space back in our warehouse and I've saved close to 400 hours per year. Absolute must for anyone who is selling kits."
"Now using Kit Builder, our kit SKUs are automatically broken down into their component SKUs before being sent to our ERP, negating the need for manual inventory adjustments! Anvasoft created a real gem of an app with this. Highly recommended!"
"Our retail store simply couldn't run like it does today without Kit Builder. Allowing us to reuse the same unique SKU codes and create unique discounted product kits & sets. Easy editing and the option of bulk editing through an Excel spreadsheet makes bulk changes simple."
"This app eliminated the problem of selling in kits — it makes a one click, easy to understand solution to our customers' needs. Really like the way this app shows all the contents of the kit in a user's cart."
"We have this app to help us merchandise over 300 kits on our site. After a quick email to support they were able to not only fix the problem, they were also able to customise the app so it now works perfectly. Their support is without question, second to none!"
Pricing
Kit Builder is available on the BigCommerce App Marketplace. Choose the plan that fits your kitting and bundling volume.
All plans billed monthly. Every plan includes a 2-week free trial — no commitment required.
FAQ
Get Started
Install Kit Builder from the BigCommerce App Marketplace and have your first kit or bundle running today — free to get started.
Start Your Free 2-Week Trial →Kit Builder is a dedicated BigCommerce kitting app and BigCommerce bundling app that gives merchants full control over product bundle inventory. Whether you're selling gift bundles, product kits, parts kits, custom bundles, or build-your-own kits, Kit Builder handles the inventory maths automatically. Every bundle sale triggers an instant subtraction of component stock — meaning your BigCommerce store always shows the real number of kits available to sell. No overselling. No manual spreadsheet updates. No stock discrepancies.
Unlike generic bundle plugins, Kit Builder was designed ground-up for BigCommerce bundle management and kitting workflows. It supports unlimited components per kit, variant-level kitting (size, colour, flavour), dynamic bundle quantities, automated Assembly Reports, and a full REST API for programmatic kit and bundle management. Kit Builder is also fully multi-storefront compatible — manage all your kits from one place across every BigCommerce storefront. If you need a reliable BigCommerce product bundle app that scales with your store — Kit Builder is it.