How to Add Upsell Offers to Your Squarespace Store (Plugin Guide)
Adding upsell offers to your Squarespace store used to mean hiring a developer or settling for a workaround that barely worked. In 2025, a purpose-built plugin handles the entire process — from creating offers to tracking their performance — without touching a line of code.
This guide covers exactly how to add upsell offers to your Squarespace store using a plugin.
What Upsell Offers Are (and Aren't)
An upsell offer on a Squarespace store is any widget that suggests additional or complementary products to a customer who is already engaged with your store. This includes:
- Cross-sells: Suggesting a complementary product alongside one the customer is viewing
- Bundles: Offering multiple products together at a discount
- Frequently bought together: Showing what other customers who bought the same product also purchased
What upsell offers are not: annoying popups that appear on every page load, generic product grids unrelated to what the customer is viewing, or high-pressure tactics that interrupt the shopping experience.
Done well, upsell offers feel like helpful suggestions — not sales pressure.
The Best Upsell Plugin for Squarespace: UpsellGrow
UpsellGrow is a Squarespace-native upsell plugin built specifically for Squarespace 7.1. It installs as a block through the native Squarespace editor — no code injection, no developer required.
How to Add Your First Upsell Offer
Step 1: Install UpsellGrow
Add UpsellGrow to your Squarespace store via the block editor. Authorize the connection. Takes about 5 minutes.
Step 2: Create a New Offer
In the UpsellGrow dashboard, click "New Offer." You'll be guided through two steps: choose the page location (start with Product Page), then choose the offer type (start with Cross-sell).
Step 3: Configure the Offer
Select the trigger products — the products that activate this offer. Select the products you want to suggest. Choose the position on the page (Below Add to Cart is a strong default).
Step 4: Customize the Design
Set the widget layout (stack or grid), colors, heading text, and button text. Match the offer widget to your store's existing design.
Step 5: Add Conditions (Optional)
Use the condition builder to add rules: only show this offer if cart value is above $X, hide it if the suggested product is already in the cart, or limit it to a specific date range.
Step 6: Publish
One click. The offer goes live on every trigger product page you selected.
Expanding Beyond the Product Page
Once your first product page offer is live and generating data, expand to other locations. UpsellGrow supports offers on the cart page (5 positions), slide-out cart (3 positions), order confirmation page (4 positions), and order status page (4 positions). Each additional location adds another touchpoint where customers can discover and add products to their order.
What to Expect
Most stores see initial results within the first two weeks. Cross-sell conversion rates of 10 to 20 percent are common for well-targeted offers. AOV increases of 15 to 30 percent are typical after the first month of running a complete offer system across multiple locations.
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.