Shipping > ShipStation

ShipStation is widely used for bringing all your shipping to one place, aggregating a wide variety of channels including Shopify, eBay, Amazon and more into one shipping system. It allows you to do easy price comparison across multiple shipping provides eg UPS, FedEx, with your negotiated rates to ensure you use the cheapest and fastest service for your customer.  

In addition it has support for data analysis and rule based automation to streamline your shipping process. 

 Try ShipStation out with a 30 day free trial