When it comes to WooCommerce integration with shipping companies, you have some excellent options:

ShipStation: A top choice, ShipStation streamlines order import, label creation, and shipment management through a unified dashboard. It supports various carriers, including USPS, FedEx, and UPS.

Shippo: Shippo offers real-time rates and label printing for USPS, FedEx, UPS, DHL, and more. It includes handy features like batch label printing and automatic tracking updates.

Easyship: This platform provides discounted shipping rates from major carriers like USPS, FedEx, and DHL. It also supports international shipping, automated customs forms, and real-time tracking.

UPS: UPS offers a dedicated WooCommerce shipping plugin that grants access to UPS services and rates directly within your WooCommerce store. Features like address validation and package tracking are included.

FedEx: FedEx also offers a WooCommerce shipping plugin that seamlessly integrates with your WooCommerce store, offering real-time rates, label printing, and package tracking.

Choosing the best option depends on your specific requirements, including shipping rates, carrier preferences, and any additional features you may need. Make an informed decision to optimize your WooCommerce shipping experience.