Finding a bundled app that seamlessly integrates with various third-party platforms like Amazon, eBay, Faire, and others while accurately managing inventory can indeed be a challenge. Here are some suggestions and considerations that might help you in your search:
iCart - Cart Drawer Cart Upsell
This app is known for its upsell and bundle functionalities and can enhance your cart experience. While it primarily focuses on Shopify, you’ll need to check its compatibility with inventory management across other platforms like Amazon or eBay.
Bundle Builder
Bundle Builder allows you to create customizable product bundles and manage inventory effectively. It’s essential to confirm if it integrates with the specific platforms you are using.
Bold Bundles
Bold Bundles offers a robust solution for creating product bundles. It also provides good inventory management features, but you’ll want to verify how it syncs with your other sales channels.
If the app is using the latest cart transformation API, it can sync with 3rd party inventory systems. But you’ve to know what bundle type you are looking for, whether fixed or custom bundles. If you don’t know which one to get started, you can also try Shopify’s official Bundles app. It can support fixed bundles.