ShipStation offers discounted rates for the United States Postal Service (USPS), which can be significantly lower than standard rates.
These discounts are possible due to the high volume of shipments processed by ShipStation, enabling them to negotiate better rates with USPS.
The rates you can get with ShipStation for the USPS are discounted as much as 89%. This is available by combining commercial rate with the volume based discount discussed above.
It’s important to keep in mind the USPS typically raises rates every year. In 2024, the average rate increase is over 5% for all services offered by the USPS.
Also, it’s important to note that ShipStation is not the only platform offering discounted USPS rates. Other platforms like ShippingEasy, EasyPost, EasyShip, Pirate Ship, and Shippo all offer very similar discounted rates to ShipStation.
The rates all platforms will offer you are controlled by USPS and therefore mostly the same.
If you’re using ShipStation and want to automatically compare USPS rates to other carriers like UPS or FedEx, a good tool to try is String. String will compare all available rates to select the cheapest one for every order.
You can get a free savings analysis from String by requesting a demo at www.meetstring.com
Understanding cubic pricing is one thing. Actuallycapturing those savings on every single shipment is another.
The pitfalls are real: wrong box dimensions, inaccurate weights, automation rules that misfire, and adjustments that quietly eat into your margins. Even
platforms that claim to handle cubic pricing automatically can leave money on the table if your package data isn't dialed in.
That's exactly what String was built to solve. String automatically selects the right package size for each order and then compares cubic and standard
rates side by side — so you always ship at the lowest possible cost, every time, without any manual guesswork.
No spreadsheets. No second-guessing. Just optimized rates on autopilot.
If you're shipping dense, small-to-mid-sized products and you're not 100% confident you're capturing cubic savings on every label, it's worth a
conversation.
Click here to book a free shipping audit
We'll take a look at your current setup and show you exactly how much you could be saving.
