Shopify App Comparison 2026

Upsell & Cross Sell — Selleasy

4.92,250 reviews
VS

FBP | Fast Bundle Product

5.02,380 reviews

Which Shopify upsell app increases AOV more? Compare pricing, features, ratings & real merchant reviews for Upsell and FBP | Fast Bundle Product to find the best fit for your store.

Built for Shopify

Boost AOV with one-click upsell and cross-sell offers displayed before and after purchase.

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Key Features

  • Pre-purchase cross-sell offers shown on product pages as Amazon-style "frequently bought together" bundles
  • Post-purchase one-click upsell page with dedicated thank-you page funnels
  • Cart upsell funnel with add-ons and product recommendations based on cart contents
  • Multi-language and multi-currency support for international stores
  • Customizable widget styling that auto-matches your store theme with no code changes required

Verdict on Upsell

Selleasy is one of the most well-rounded upsell apps on Shopify, offering pre-purchase, in-cart, and post-purchase funnels in a single install. Its generous free tier makes it ideal for new stores, while the paid plans remain affordable even for high-volume merchants. The app is easy to set up and integrates cleanly with most themes, making it a strong default choice for any store looking to grow AOV.

Build product bundles quickly with mix-and-match, volume discounts, and frequently bought together offers.

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Key Features

  • Multiple bundle types including fixed, mix-and-match, frequently bought together, and subscription bundles
  • Real-time inventory sync ensuring bundles never oversell individual products
  • Customizable bundle widget with drag-and-drop layout builder
  • Subscription bundle support for recurring revenue streams
  • Seamless integration with Shopify checkout and discount system

Verdict on FBP

Fast Bundle earns its perfect 5.0 rating by delivering a polished, fast, and reliable bundling experience. Its inventory sync feature is a standout, preventing the overselling issues that plague some competing apps. The subscription bundle capability on the Growth plan also makes it a strong choice for stores building recurring revenue. If you need a versatile, well-built bundle app, Fast Bundle belongs on your shortlist.

Upsell vs Product — Side-by-Side Feature Comparison

Wondering which app offers the features you actually need? This feature-by-feature breakdown shows exactly where Upsell and FBP | Fast Bundle Product differ — so you can make an informed decision for your Shopify store.

FeatureUpsell &FBP | Fast
Slide Cart Drawer
In-Cart Upsells
Cross-Sell Recommendations
Post-Purchase Upsell
Product Page Upsell
Frequently Bought Together
Free Gifts with Purchase
BOGO Offers
Free Shipping Progress Bar
Tiered Rewards
Countdown Timer
Sticky Add to Cart
Announcement Bar
Trust Badges
Discount Code in Cart
Volume Discounts
Shipping Protection
AI Recommendations
A/B Testing
Thank You Page Upsell
Checkout Upsell (Plus)
Cart Analytics
Multi-Language
Multi-Currency
Custom CSS/HTML
Free Plan
Mobile Responsive

Integration & Compatibility Comparison

App integrations matter — especially when you're running multiple tools in your Shopify stack. Here's what each app connects with out of the box.

Upsell & Cross Sell — Selleasy

Built for Shopify
  • Shopify Checkout
  • Customer Accounts
  • Shopify Admin
  • AppHQ Slide Cart
  • Conversion Bear
  • Geolocation
  • LogBase Store Pickup
  • PageFly
  • Online Store 2.0 Themes

Supported Languages

English, German, French, Spanish, Dutch, Portuguese (Brazil), Chinese (Simplified)

FBP | Fast Bundle Product

    Frequently Asked Questions

    Is Selleasy free to use?

    Yes, Selleasy offers a fully featured free plan for stores processing up to 50 orders per month. All upsell and cross-sell features are included at every tier, with paid plans starting at $8.99/month for higher order volumes.

    Does Selleasy work with my Shopify theme?

    Selleasy is designed to work with all Shopify themes, including Online Store 2.0 themes. The widgets automatically match your store styling, and you can further customize colors, fonts, and layout through the app settings.

    Can I show upsell offers after checkout?

    Yes, Selleasy supports post-purchase one-click upsell pages that appear after payment but before the thank-you page. Customers can accept additional offers without re-entering payment details.

    Does Fast Bundle sync with Shopify inventory?

    Yes, Fast Bundle includes real-time inventory synchronization that tracks individual product stock levels within bundles. When a component product sells out, the bundle is automatically marked as unavailable, preventing overselling.

    Can I create subscription bundles?

    Yes, the Growth plan at $19.99/month supports subscription bundles. Customers can subscribe to receive a bundle on a recurring basis, helping you build predictable recurring revenue.

    What types of bundles can I create?

    Fast Bundle supports fixed bundles, mix-and-match bundles, frequently bought together offers, volume discount bundles, and subscription bundles. The Starter plan unlocks most bundle types, with subscription bundles available on the Growth plan.