USPS® with Soapbox

Soapbox powers USPS shipping through real-time optimization and system-level orchestration.

How it Works

Soapbox + USPS 

Real-Time Optimization

USPS shipping decisions are calculated dynamically at the time of shipment.

Operational Reliability

Consistent execution across service levels, delivery windows, and routing constraints.

Scalable Performance

Supports high-volume shipping with predictable cost and delivery outcomes.

System
Visibility

End-to-end visibility into shipment status, costs, and performance.

Supported USPS Service Levels

Shipping Services

Rate Card

USPS Carrier Rates
Effective 2026

Domestic

Delivery SpeedMax WeightTrackingBest for
USPS Priority Mail
1–3 business days
70 lbs
Included
Packages with tracking
USPS Priority Mail Express
Next-Day to 2-Day
70 lbs
Included
Urgent shipments
USPS Ground Advantage
2-5 business days
70 lbs
Included
Everyday shipping
USPS Media Mail
2–8 business days
70 lbs
Included
Books, recorded media, and educational materials

International

Delivery SpeedMax WeightTrackingbest for
USPS First Class International
Varies by destination
4 lbs
Included
Budget international shipping
USPS Priority Mail International
6–10 business days
70 lbs
Included
Standard international shipping with tracking
USPS Priority Mail Express International
3–5 business days
70 lbs
Included
Urgent international shipments
Rates subject to change. Visit usps.com for current pricing.

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