ChannelUnity

If you want a set of enterprise grade integrations with marketplaces like Amazon, eBay and Walmart then stop looking. You’ve just found the perfect solution.
Since 2009 Magento, Shopify and Bigcommerce users have been trusting ChannelUnity to automate managing single or multiple marketplaces, save them time and give them the opportunity to increase sales.
ChannelUnity transforms your WooCommerce store into a powerful multichannel sales and inventory management system.
Automate management of your product listings on 30+ online marketplaces around the world including Amazon, eBay, Walmart, Wayfair and Temu. Create new product listings with ease using your WooCommerce product data.
Retain WooCommerce as your central hub for online order fulfilment. All orders are imported automatically into your store with stock reduced and available inventory updated across all active sales channels providing maximum protection against overselling. 
ChannelUnity’s lightweight plugin, class leading automation and cloud infrastructure minimises performance impact on WooCommerce and gives you more time.
Key Features:
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Real-time synchronisation of product data and stock quantity between WooCommerce and options for 30+ global marketplaces.
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Orders from all connected marketplaces imported automatically into WooCommerce retaining a single fulfilment process for all online orders.
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Connect up existing marketplace listings and active items in WooCommerce.
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Supports Parent and Child/Variation products.
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List on 30+ marketplaces worldwide.
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Amazon Competitive Automatic Re-pricing included as standard.
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Standard eBay listing templates included alongside a powerful listing template designer.
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Listing inventory tools give flexibility to list low inventory quantities to encourage customers to buy quickly before the item is out of stock whilst Stop Sell limit settings give control over point at which to stop selling fast moving items to avoid overselling.
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Shipping an order in WooCommerce automatically notifies the marketplace.
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More Information:
Find out more about ChannelUnity features at https://www.channelunity.com/solution-overview/ 
Pricing – This plugin connects your WooCommerce store to your ChannelUnity account and is provided free. Contact a ChannelUnity integrations expert for your service quote – https://www.channelunity.com/contact/

Amazon, eBay, NewEgg, Walmart and more. WooCommerce Multichannel Integration by ChannelUnity

Boost e-commerce success with ChannelUnity—seamless marketplace integration, automated inventory sync, and order management for multi-channel selling.

denny1989

The plugin is free to use and offers the following features: 
* Works for all Amazon-Marketplaces 
* Sync amazon stock with WooCommerce for selected products (manual or automatically) 
* Send orders manually (single or bulk) to Amazon directly via the WooCommerce orders menu 
* Various options on how to handle orders that can’t be fulfilled (e.g. if there is no stock available)

Amazing Fulfillment Integration for WooCommerce

An easy to use plugin that lets you send WooCommerce Orders to multichannel fulfillment by Amazon

Amazon, eBay, NewEgg, Walmart and more. WooCommerce Multichannel Integration by ChannelUnity vs Amazing Fulfillment Integration for WooCommerce