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

https://technivorz.com/does-shippo-really-offer-strong-ups-rates-compared-to-other-tools/

Pirate Ship offers USPS shipping discounts up to 87%, making it a great choice for sellers focused on USPS. However, their support is email-only, which might slow things down if you need quick help