Pirate Ship delivers great USPS discounts—up to 87% off—making it a solid...

https://shipping-discounts.s3.amazonaws.com/goshippo/video/pirateship-shipping-reviews.html

Pirate Ship delivers great USPS discounts—up to 87% off—making it a solid choice if you mainly ship with USPS. Support is email-only, which might slow down help. Shippo steps in better if you need DHL Express or want more carrier options