Pirate Ship offers up to 87% off USPS rates, making it a top pick if you mainly...

https://www.slideserve.com/soltostvly/what-s-the-simplest-way-to-compare-pirate-ship-and-shippo-without-overthinking-i

Pirate Ship offers up to 87% off USPS rates, making it a top pick if you mainly ship USPS and want great discounts. Its support is only by email, which might slow things down