The Best Product Bundle Plugin for Squarespace (2025 Guide)
If you sell on Squarespace and you want to increase average order value, product bundles are the single most effective tool available to you. They work because they align perfectly with how customers think: get more, pay less. And they work for you because more products per order means more revenue without more traffic.
The problem is Squarespace doesn't support product bundling natively. There's no "bundle this with that" feature, no grouped pricing, no package deals. To sell bundles on Squarespace, you need a plugin.
Here's the definitive guide to the best product bundle plugin for Squarespace in 2025.
What a Bundle Plugin Actually Does
A bundle plugin lets you group two or more products together and sell them as a single offer — usually at a discount. The customer sees a clear "buy these three things together and save $20" proposition. You get a higher-value order. The bundle appears as a recommendation alongside the individual products, not as a separate product the customer has to go find.
Technically, on Squarespace, bundles are created as hidden products via the Squarespace Products API. The plugin handles this automatically — you don't create any products manually. You just select which existing products go in the bundle, set the price, and the plugin handles the rest.
What to Look for in a Squarespace Bundle Plugin
Variant-Level Control
A bundle isn't just "Shirt + Trousers." It's "Medium Blue Shirt + 32-inch Black Trousers." Fixed variant selection is essential — you need to specify exactly which variant of each product is included, not just the product.
Automatic Pricing
The plugin should calculate the original price (sum of variant prices) automatically and let you set a sale price below it. Customers should clearly see the saving.
Appearance Across Multiple Pages
A bundle should be able to appear on the product page, in the slide-out cart, on the cart page, and even on the order confirmation page. The more touchpoints, the higher the chance a customer sees and adds it.
Design That Matches Your Store
The bundle widget needs to look like it belongs on your store. Font, colors, layout — if it looks like a third-party add-on, trust drops and conversion drops with it.
The Best Bundle Plugin for Squarespace: UpsellGrow
UpsellGrow is built specifically for Squarespace 7.1 and includes full product bundling as one of its three offer types. Here's what sets it apart:
Up to 5 products per bundle, each with fixed variant selection. The plugin auto-calculates the original price from the sum of selected variant prices. You set the sale price and the savings badge is generated automatically.
Bundles are created as hidden Squarespace products via the API. They don't appear in your store navigation, collections, or search results — only inside UpsellGrow offer widgets. No catalog clutter.
A dedicated Bundles manager in the dashboard lets you create, edit, duplicate, and manage all your bundles in one place. Each bundle shows how many offers it's attached to — so you know the impact before making changes.
Bundles work across all 5 UpsellGrow page locations: product page (6 positions), cart page (5 positions), slide-out cart (3 positions), order confirmation (4 positions), and order status (4 positions).
Full design control: stack or grid layout, carousel option, color pickers, font settings. The bundle widget looks native to your store.
Pricing
UpsellGrow Free plan includes 1 active offer (including bundles). Growth plan is $17/month for up to 10 offers. Scale is $29/month for unlimited. All plans include every location and position.
How to Create Your First Bundle
In the UpsellGrow dashboard, go to Bundles and click "New Bundle." Name the bundle, pick an emoji or upload an image, add up to 5 products with their fixed variants, set the sale price, and save. Then create a new offer, choose "Bundle" as the type, select your bundle, pick the page and position, and publish. Live in under 10 minutes.
The Bottom Line
If you're serious about increasing average order value on Squarespace, product bundles are where to start. UpsellGrow is the only plugin built specifically for Squarespace that handles the full bundle workflow — creation, display, analytics, and management — in one place.
Ready to Start Earning More From Every Order?
UpsellGrow adds upsells, cross-sells, bundles, and frequently bought together offers to your Squarespace store — across 5 pages and 19 positions. No coding. Setup takes minutes.