Shipping that doesn't make you
create a fake order first.
Shopify forces you to create an order before printing a label. We don't. Commercial rates on USPS, UPS, FedEx, Canada Post, and Purolator — available to every Sour Sync merchant from day one.
How it works
Three steps to a shipped package
Get rates in seconds
Enter the from/to addresses and select your device type. Rate cards from USPS, UPS, FedEx, Canada Post, and Purolator appear instantly with your commercial prices.
Buy with one click
Select your preferred carrier and service. Confirm the total — which is always lower than retail. Label PDF downloads immediately.
Track it all in one place
Every label lives in your Sour Sync Shipping dashboard. Download PDFs, create return labels, void unused labels, and track all shipments without leaving the app.
Sample rates
Sour Sync rates vs. what you'd pay walking into a UPS Store. Actual rates vary by origin/destination.
| Package | USPS | UPS | FedEx | Canada Post |
|---|---|---|---|---|
| Smartphone (0.5 lb) | $4.29Ground Advantage | $6.99UPS Ground | $7.49FedEx Home | $14.99Canada Post Tracked |
| Tablet / iPad (1.5 lb) | $9.49Priority Mail | $10.99UPS Ground | $11.49FedEx Ground | $22.99Canada Post Xpresspost |
| Laptop (5 lb) | $18.99Priority Mail | $14.99UPS Ground | $15.49FedEx Ground | $24.99Purolator Ground |
| Gaming Console (6 lb) | $22.49Priority Mail | $18.99UPS Ground | $19.49FedEx Ground | $31.99Purolator Ground |
* Rates shown in USD. Actual rates depend on origin/destination zip codes and package dimensions. All rates are final, all-in pricing.
Your shipping ROI
See exactly how much you save vs. walking into a UPS Store or buying retail labels.
Calculate your savings
Retail UPS rate
$16.99
per label
Sour Sync rate
$6.99
save 59%
Monthly savings
$500
$6,000/yr
Everything you need. Nothing you don't.
No order required
Create a label for any shipment in seconds. No fake orders, no workarounds. Just enter the addresses, pick a carrier, done.
Enterprise rates for everyone
Access negotiated commercial rates on USPS, UPS, FedEx, Canada Post, and Purolator — rates that used to require high-volume contracts.
Semi-auto on packed orders
When an order moves to "packed", Sour Sync instantly surfaces rate options. One click to purchase and ship — tracking auto-saves to the order.
Return labels built-in
Generate a pre-paid return label from any outbound shipment with one click. Buyers get a QR code, you get clean reverse logistics.
US & Canada
Ship domestically and cross-border. USPS, UPS, FedEx for the US. Canada Post and Purolator for domestic CA and CA→US.
Rate calculator for quoting
Get instant carrier rates to share with buyers before they commit. Copy the quote with one click. No login required for the buyer.
Start shipping smarter today
Your first labels are on us. No credit card required. Set up in under 2 minutes.
Get started free