Pirate Ship offers USPS shipping up to 87% off, making it a great choice if you...

https://blast-wiki.win/index.php/Is_There_Any_Reason_to_Start_with_Shippo_Instead_of_Pirate_Ship%3F

Pirate Ship offers USPS shipping up to 87% off, making it a great choice if you mainly ship USPS and want simple, discounted rates. Support is via email only, which might slow things down