StoreFeeder integrates many marketplaces and web stores. The platform does not directly integrate Amazon and eBay but puts orders from both marketplaces into one dashboard. StoreFeeder allows you to list both marketplaces and will manage your inventory and keep your inventory numbers up to date automatically as orders are placed.

‍

So, whilst StoreFeeder does not directly integrate Amazon and eBay, it gives you a single dashboard to manage orders, inventory, and the despatch of orders from both these marketplaces and your webstores. You can see how StoreFeeder does this by requesting a demonstration here.