From the conversion glossary
Concepts referenced in this article, defined.
Rebuy vs Bold Upsell for Shopify
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Run rigorous A/B tests and personalize every visit on Shopify or any storefront โ no engineers required.
Concepts referenced in this article, defined.
Run rigorous A/B tests and personalize every visit on Shopify or any storefront โ no engineers required.
Rebuy is a more sophisticated, AI-powered personalised recommendations and upsell platform for Shopify โ better for brands that want data-driven cross-sell and upsell logic across the full customer journey (product pages, cart, checkout, post-purchase). Bold Upsell is a simpler, rules-based upsell tool that's easier to set up, cheaper to start with, and sufficient for brands that need basic "add this product" or "upgrade to this variant" offers without complex algorithmic logic. If maximising average order value (AOV) is a core growth lever and you have a catalogue with genuine cross-sell opportunities, Rebuy's depth justifies the higher cost.
Rebuy is a personalised product recommendations and smart cart platform built for Shopify and Shopify Plus. It uses AI-driven recommendation algorithms to surface relevant cross-sells and upsells at product pages, the cart (via a customisable Smart Cart), checkout, and post-purchase pages. It integrates with Klaviyo, Recharge (for subscriptions), and other Shopify ecosystem tools. Pricing starts at $99/month for Standard (up to $4,000 GMV influenced/month), scaling to $249/month, $499/month, and $749/month for higher GMV bands.
Bold Upsell is a Shopify app by Bold Commerce that enables product upsells and cross-sells via popup offers, cart additions, and post-purchase offers. It works through rules-based triggers โ if a customer adds Product A to their cart, show an offer for Product B. Bold Upsell is straightforward to configure without technical knowledge. Pricing starts at $9.99/month for up to 200 upsell views/month, with higher tiers at $24.99/month (1,000 views) and $59.99/month (5,000 views).
| Feature | Rebuy | Bold Upsell |
|---|---|---|
| AI product recommendations | Yes | No (rules-based only) |
| Smart Cart (customisable cart drawer) | Yes | No |
| Product page upsells | Yes | Yes |
| Cart upsells/cross-sells | Yes | Yes |
| Checkout upsells (Shopify Plus) | Yes | Yes |
| Post-purchase offers | Yes | Yes |
| Thank-you page offers | Yes | Yes |
| Subscription integration (Recharge) | Yes | Limited |
| A/B testing | Yes | No |
| Klaviyo integration | Yes | Limited |
| Analytics/ROI reporting | Yes | Basic |
| Starting price | $99/month | $9.99/month |
| Price at scale | $749/month (high GMV) | $59.99/month |
| Setup complexity | Moderate | Easy |
Bold Upsell's pricing is dramatically lower โ $9.99/month vs Rebuy's $99/month at entry level. For D2C brands with modest traffic, this is a significant difference.
Bold Upsell:
Rebuy:
Rebuy's pricing is based on influenced GMV (revenue that passes through Rebuy's recommendations), which means the cost scales with the value it generates. A store using Rebuy that has $20,000/month in influenced GMV (meaning Rebuy's recommendations contributed to those purchases) pays $499/month โ a 2.5% take rate on influenced revenue.
If Rebuy actually drives the influenced GMV it attributes to itself, the ROI is positive. The debate is in the attribution model: influenced GMV counts any purchase where Rebuy was involved in the journey, which can overstate direct impact.
This is the core product difference.
Rebuy's AI approach: Rebuy trains recommendation models on your store's purchase history and browsing behaviour to surface genuinely relevant cross-sells. If customers who buy Protein Supplement A frequently also buy Shaker Bottle B, Rebuy learns this and recommends Bottle B to new buyers of Supplement A. As your catalogue and order history grows, recommendations improve automatically.
Bold Upsell's rules-based approach: Bold Upsell works through manual rules: if Product A is in cart, show Product B. You set the rules. This is transparent and predictable, but it requires merchandising expertise to configure well and doesn't adapt automatically to changing purchase patterns.
For a D2C brand with 20 SKUs, Bold Upsell's manual rules are entirely manageable โ you probably know your cross-sell relationships already. For a brand with 200+ SKUs (or a food/health brand with many complementary products), Rebuy's AI becomes genuinely valuable.
Rebuy's Smart Cart is a customisable cart drawer that replaces Shopify's default cart. It displays in-cart recommendations, free shipping progress bars, add-on products, and countdown timers. This is one of Rebuy's most effective AOV features โ the cart drawer itself becomes a conversion optimisation surface.
Bold Upsell does not have a cart drawer replacement. It surfaces offers via popup overlays when items are added to the cart, which is less integrated but also less disruptive.
For D2C brands, Rebuy's Smart Cart approach is generally considered higher-converting than popup overlays, which can be dismissed or ignored.
Both Rebuy and Bold Upsell are focused on maximising AOV through upsells and cross-sells. But the pages that lead up to the cart โ your product pages, collection pages, and homepage โ also significantly affect how many customers add to their cart in the first place.
A 1% improvement in add-to-cart rate across all product page visits is worth more than a 5% AOV lift from upsells, because it affects the entire top of your conversion funnel. Testing product page layouts, CTA button placement, product photography, and pricing display are all A/B testing opportunities that neither Rebuy nor Bold Upsell addresses.
If you're evaluating Rebuy or Bold Upsell for your Shopify store, you'll also want an A/B testing tool for your product and collection pages. CustomFit.ai integrates with Shopify and lets you run no-code experiments on any page in your store โ testing the elements that affect add-to-cart rates and conversion rate independently of your upsell stack. Start a 14-day free trial and optimise the full funnel, not just the cart.
Does Rebuy work on Shopify without Shopify Plus? Yes. Rebuy's core features work on all Shopify plans. Checkout upsells (within Shopify's native checkout) require Shopify Plus due to Shopify's checkout restrictions.
Can Bold Upsell show offers after purchase? Yes. Bold Upsell supports post-purchase upsells and thank-you page offers as part of its feature set.
How does Rebuy's influenced GMV calculation work? Rebuy attributes a purchase as "influenced" if the customer viewed or interacted with a Rebuy recommendation during their session before completing the order. This can include sessions where the customer didn't click the recommendation.
Is Bold Upsell part of Bold Commerce? Yes. Bold Upsell is one of several Shopify apps built by Bold Commerce, a Canadian company with multiple Shopify ecosystem products.
What is the average AOV lift from upsell tools? Industry benchmarks vary widely by category. Brands report AOV lifts of 5โ25% from upsell tools, depending on catalogue fit, recommendation relevance, and placement.