10 Best Cross Sell Tools for Founders [2026 Updated]

1. Rebuy

• Type: Paid
• URL: https://www.rebuyengine.com
• Overview: Rebuy is an ecommerce personalization platform that delivers AI-driven product recommendations, bundling, and personalized cart/checkout experiences to increase average order value. It focuses on on-site and post-purchase cross-sell workflows with A/B testing and analytics to optimize complementary offers.

2. Nosto

• Type: Paid
• URL: https://www.nosto.com
• Overview: Nosto provides a personalization engine for ecommerce that serves tailored product recommendations across site, checkout, and email to drive cross-sells and increase AOV. It includes merchandising controls, segment targeting, and dynamic placements to surface relevant complementary products.

3. LimeSpot

• Type: Paid
• URL: https://limespot.com
• Overview: LimeSpot uses shopper behavior and network-wide data to power “Frequently Bought Together,” related-items, and cross-sell recommendation widgets across product, cart, and checkout pages. The platform emphasizes real-time personalization and multiple recommendation types to boost conversions and cart value.

[b]4. BOLD (Bold Upsell & Cross-sell)</b]

• Type: Paid
• URL: https://boldcommerce.com
• Overview: Bold offers upsell and cross-sell apps (Bold Upsell) that enable in-checkout, cart, and post-purchase offers plus AI smart offers to increase average order value and convert one-time buyers into repeat customers. The product integrates tightly with Shopify and subscription flows to present complementary product offers at key touchpoints.

5. Klaviyo

• Type: Paid
• URL: https://www.klaviyo.com
• Overview: Klaviyo is an email and SMS marketing platform that supports behavior-based segmentation and product recommendation blocks to run targeted cross-sell campaigns to customers who bought specific items. It enables automated cross-sell flows and personalized recommendations using purchase and browsing data to drive incremental revenue.

[b]6. Yotpo (Product & Recommendation Solutions)</b]

• Type: Paid
• URL: https://www.yotpo.com
• Overview: Yotpo provides reviews, UGC, and AI-powered product recommendations that work together to surface complementary products and social proof for effective cross-sells. Its recommendation engine and onsite widgets help convert shoppers by showing relevant add-ons and bundles informed by reviews and customer behavior.

[b]7. CartHook (Post-Purchase Offers)</b]

• Type: Paid
• URL: https://carthook.com
• Overview: CartHook specializes in post-purchase one-click upsells and cross-sell funnels delivered on the thank-you page to increase AOV without adding checkout friction. It provides a drag-and-drop funnel builder, one-click checkout compatibility, and analytics to test post-order offers.

[b]8. Privy (Cross-Sell Displays & Popups)</b]

• Type: Free
• URL: https://www.privy.com
• Overview: Privy is a conversion and on-site messaging tool that includes Cross Sell display types (popups, flyouts, and bars) to recommend complementary products at cart or product pages. It offers targeting triggers and audience rules so merchants can show timely, contextual cross-sell offers to increase order value.

9. OptiMonk

• Type: Paid
• URL: https://www.optimonk.com
• Overview: OptiMonk is a shopper messaging and onsite personalization platform that supports product recommendation elements in popups and sticky bars to promote complementary products and cross-sells. It uses visitor behavior, recently viewed and popular-product logic to surface relevant add-ons and increase AOV.

10. Growave

• Type: Paid
• URL: https://www.growave.io
• Overview: Growave is a retention and loyalty platform that combines loyalty, referrals, wishlists, and UGC to encourage repeat purchases and drive cross-sell opportunities through targeted rewards and VIP experiences. By leveraging wishlists, points, and personalized incentives at checkout, it helps merchants increase AOV and lifetime value through complementary product promotions.