Pirate Ship offers great USPS discounts—up to 87% off—and easy label printing,...

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

Pirate Ship offers great USPS discounts—up to 87% off—and easy label printing, making it perfect for sellers who ship mostly with USPS. But if you need DHL Express or prefer chat support over email only, Shippo might be a better fit