Sellbrite

Great little app, I have been using it for years with few issues. It's the only app around with a useful free plan that can sync your Shopify store inventory with Etsy and Ebay. Very easy to use.

Products are syncing when we publish on sales channel for the first time.
After that there is no real time syncing of price and inventory. So we had oversold products.
Support is very fast but we only get basic and generic feedback.
Videos are very basic.
Nobody really looks at our issue.
Cannot resolve issues.

We’ve been experiencing serious issues with Sellbrite allowing Amazon to oversell our inventory for over a month now. Initially, we assumed it was a mistake on our end, but after closely monitoring the situation, we discovered that Sellbrite was not syncing any inventory data from our Shopify store.

Multiple products that are marked as drafts with zero inventory in Shopify are still showing quantities of 5–10 in Sellbrite.

We reached out through live chat in hopes of resolving the issue, but after waiting seven days with no action taken to even open a support ticket, we’ve had enough. We're removing the app from our store and actively seeking a more reliable solution.

If you're a business managing a large catalog and need accurate inventory syncing with Amazon, this is definitely not the solution.