ShipStation offers a more complex carrier integration that gives you a much higher level of control over how a shipment is managed and fulfilled. However, to access the bulk of ShipStation’s larger suite of features a merchant would need to manage the shipment via the ShipStation portal rather than within the eCom admin.

EasyPost is the more simplified of the two carrier integrations and it can be used to easily connect multiple different shipping carriers to your eCom account to display live shipping rates at checkout. The integration allows merchants to manage and fulfill the shipment entirely within eCom but has limits on the level of control you have over how that shipment is handled.

Print shipping labels and fulfill your orders only from within the eCom admin.

• Allows you to set a default weight/size for products.
• Allows you to set a standard box size for your shipments.

Adding weights/dimensions for all items is required to be able to display accurate shipping rates in checkout. This is because the EasyPost integration is not designed to configure default product sizes.

Box dimensions are calculated by the system automatically:

• For 2 products: The sum of the widths + length + the largest height
• For 2+ products: The largest dimension in the cart will be considered

Requires you to sign up and pay a monthly fee for the service (prices range from $9-$159 a month)

https://www.shipstation.com/pricing/

No sign up fee, only pay 1 cent for each shipping label you print

https://www.easypost.com/pricing

Ship with ShipStation

Ship with EasyPost