Shippo vs EasyPost vs ShipStation: Shipping API 2026
Shippo vs EasyPost vs ShipStation: Shipping API Comparison 2026
TL;DR
EasyPost is the best pure API for developer-built shipping workflows — clean REST API, multi-carrier rate shopping, and carrier-agnostic label generation. Shippo is the fastest path to shipping labels with a generous free tier (500 labels/month) and solid discounted carrier rates. ShipStation is an order management platform with an API bolted on, not an API-first product — the right choice for operations teams, not developers building custom shipping logic. For most e-commerce or marketplace platforms building shipping into their product, EasyPost or Shippo wins.
Key Takeaways
- EasyPost: 100+ carriers; used by Shopify, Etsy, eBay; most developer-friendly API in the category
- Shippo: Free tier for 500 labels/month; pre-negotiated USPS/UPS/FedEx rates below retail; best for low-volume or startup use
- ShipStation: 40+ carriers; order management UI-first product; API is secondary; not recommended for programmatic-only integrations
- Webhook support: All three support shipment tracking webhooks; EasyPost has the most consistent event schema
- Address validation: EasyPost and Shippo include address validation APIs; ShipStation does not expose this separately
Platform Comparison Matrix
| EasyPost | Shippo | ShipStation | |
|---|---|---|---|
| API-first | Yes | Yes | No (UI-first) |
| Carriers supported | 100+ | 40+ | 40+ |
| Free tier | $0 (pay-per-label) | 500 labels/month | 30-day trial |
| Discounted rates | Yes (USPS, UPS, etc.) | Yes (USPS, UPS, DHL, FedEx) | Yes |
| Rate shopping API | Yes | Yes | Limited |
| Address validation | Yes (dedicated API) | Yes | No |
| Tracking webhooks | Yes | Yes | Yes |
| Customs/international | Yes | Yes | Yes |
| Returns API | Yes | Yes | Via UI |
| Multi-origin | Yes | Yes | Yes |
EasyPost: The Developer Standard for Shipping APIs
EasyPost has been the go-to choice for developer teams building shipping into platforms since 2012. Its API design is RESTful, consistent, and well-documented — and its scale (powering Shopify's shipping infrastructure, among others) validates reliability at serious volume.
Core API Flows
Rate shopping:
curl -X POST https://api.easypost.com/v2/shipments \
-u "your_api_key:" \
-d "shipment[to_address][street1]=417+Montgomery+St" \
-d "shipment[to_address][city]=San+Francisco" \
-d "shipment[to_address][state]=CA" \
-d "shipment[to_address][zip]=94104" \
-d "shipment[to_address][country]=US" \
-d "shipment[from_address][street1]=2+Avenue+de+Lafayeffe" \
-d "shipment[from_address][city]=New+York" \
-d "shipment[from_address][state]=NY" \
-d "shipment[from_address][zip]=10013" \
-d "shipment[from_address][country]=US" \
-d "shipment[parcel][length]=20.2" \
-d "shipment[parcel][width]=10.9" \
-d "shipment[parcel][height]=5" \
-d "shipment[parcel][weight]=65.9"
Returns rates from all enabled carriers simultaneously, sortable by cost, delivery time, or carrier.
Address verification:
curl -X POST https://api.easypost.com/v2/addresses \
-u "your_api_key:" \
-d "address[verify][]=delivery" \
-d "address[street1]=118+2+Avenue" \
-d "address[zip]=10003" \
-d "address[country]=US"
EasyPost's address verification is USPS CASS-certified — the API corrects malformed addresses and flags undeliverable ones before you create a label.
EasyPost Pricing (2026)
EasyPost is pay-per-label with no subscription fees at lower volumes:
| Volume | Label fee |
|---|---|
| USPS (all tiers) | $0.05/label |
| UPS/FedEx | $0.05/label |
| Volume discounts | Negotiate at 10K+/month |
Pre-negotiated carrier discounts apply on top of label fees. USPS Commercial Base rates (up to 37% below retail) are available to all EasyPost users from day one.
EasyPost Limits
- No built-in UI — you build everything yourself
- Customer support is email-based at lower tiers; live support requires Enterprise contract
- International carrier coverage is strong but requires per-carrier setup
Shippo: Best Free Tier and Fastest Start
Shippo targets e-commerce businesses that want discounted rates and simple label generation without building a full shipping abstraction layer. Its developer API is well-designed, and the free tier is genuinely useful for low-volume use.
Shippo Free Tier
Shippo's starter plan gives you:
- 500 labels/month at Shippo discounted rates
- USPS, UPS, DHL Express rates included
- Access to the full API and tracking webhooks
- No credit card required
This makes Shippo the best choice for hackathons, MVPs, and early-stage e-commerce products that don't have the volume to justify per-label EasyPost fees.
Shippo Discounted Rates (2026)
| Carrier | Shippo discount vs retail |
|---|---|
| USPS Priority Mail | Up to 82% off |
| UPS Ground | Up to 77% off |
| DHL Express Worldwide | Up to 77% off |
| FedEx Ground | Up to 75% off |
Shippo's pre-negotiated rates are competitive with EasyPost's for USPS, and slightly better for DHL on small package volumes.
Shippo Pricing Beyond Free Tier
| Plan | Monthly cost | What changes |
|---|---|---|
| Starter | $0 | 500 labels/month |
| Professional | $19/month | Unlimited labels, branded tracking |
| Premier | Custom | Dedicated support, custom rates |
The $19/month Professional plan removes the 500-label cap and adds branded tracking pages — worth it as soon as you're at 100+ shipments/month and care about post-purchase experience.
Shippo API Example
import Shippo from 'shippo';
const client = new Shippo({ apiKeyHeader: 'ShippoToken YOUR_KEY' });
const shipment = await client.shipments.create({
addressFrom: {
name: 'Shawn Ippotle',
street1: '215 Clayton St.',
city: 'San Francisco',
state: 'CA',
zip: '94117',
country: 'US'
},
addressTo: {
name: 'Recipient',
street1: '965 Mission St.',
city: 'San Francisco',
state: 'CA',
zip: '94105',
country: 'US'
},
parcels: [{
length: '5',
width: '5',
height: '5',
distanceUnit: 'in',
weight: '2',
massUnit: 'lb'
}],
async: false
});
Shippo Limits
- 40+ carriers (vs EasyPost's 100+) — international carrier gaps exist for Asia-Pacific
- No USPS address certification (EasyPost and USPS APIs have this, Shippo does not)
- Rate shopping is slightly less granular than EasyPost's response schema
ShipStation: Order Management Platform, Not a Developer API
ShipStation is included here because developers encounter it in job requirements and e-commerce stack discussions, but it's architecturally different from EasyPost and Shippo. It's an operations tool with an API, not an API-first product.
What ShipStation is good at
- Order import from 100+ sales channels (Shopify, Amazon, eBay, Etsy, WooCommerce)
- Batch label printing via UI
- Carrier rate rules and automation configured in-app
- Team workflows — pick, pack, ship with role-based access
ShipStation's API limitations
The ShipStation API lets you create orders, mark them as shipped, and get tracking info — but the rate shopping and label creation flows are UI-driven, not API-driven. You can't programmatically select a carrier and purchase a label the same way you do in EasyPost or Shippo without significant workarounds.
ShipStation Pricing (2026)
| Plan | Monthly | Shipments/month |
|---|---|---|
| Starter | $9.99 | 50 |
| Bronze | $29.99 | 500 |
| Silver | $59.99 | 1,500 |
| Gold | $99.99 | 3,000 |
| Platinum | $149.99 | 6,000 |
| Enterprise | Custom | 10,000+ |
Feature Comparison: Developer Use Cases
| Task | EasyPost | Shippo | ShipStation |
|---|---|---|---|
| Multi-carrier rate shopping | ✅ Excellent | ✅ Good | ⚠️ UI-only |
| Label purchase via API | ✅ Yes | ✅ Yes | ⚠️ Limited |
| Address validation API | ✅ CASS-certified | ✅ Good | ❌ No |
| Tracking webhook events | ✅ Granular | ✅ Good | ✅ Good |
| Returns label API | ✅ Yes | ✅ Yes | ⚠️ UI-focused |
| Customs/HS codes | ✅ Yes | ✅ Yes | ✅ Yes |
| Batch label creation | ✅ Yes | ✅ Yes | ✅ Yes (UI) |
| Carrier account linking | ✅ Yes | ✅ Yes | ✅ Yes |
| Test mode / sandbox | ✅ Yes | ✅ Yes | ❌ No |
Use Case Decision Guide
| Use case | Best choice |
|---|---|
| Building shipping into your SaaS/marketplace | EasyPost |
| Early-stage e-commerce, low volume | Shippo (free tier) |
| Operations team managing manual shipments | ShipStation |
| 100+ carriers required | EasyPost |
| Best discounted USPS rates, low volume | Shippo |
| Need address validation API | EasyPost |
| Want branded tracking page | Shippo Professional |
| Enterprise custom carrier negotiation | EasyPost Enterprise |
Cost at 1,000 Labels/Month (USPS Priority)
| Platform | Estimated monthly cost | Notes |
|---|---|---|
| EasyPost | ~$50 | $0.05/label fee + discounted carrier rate |
| Shippo Professional | ~$19 + carrier | $19/mo subscription, no per-label fee |
| ShipStation Bronze | ~$29.99 | Plus carrier rate — operations tool |
At 1,000 labels/month, Shippo Professional is the cheapest option. At 10,000+ labels/month, EasyPost's volume discounts and carrier breadth make it the better long-term choice.
Which Shipping API Should You Use?
Choose EasyPost if you're building shipping functionality into a platform, marketplace, or SaaS product. The 100+ carrier network, address validation API, and test mode make it the most developer-complete solution.
Choose Shippo if you're early-stage, shipping under 500 labels/month, or want the fastest possible setup with pre-negotiated carrier discounts. The free tier is genuinely generous.
Choose ShipStation if your team manages shipping operations through a UI, imports orders from multiple sales channels, and doesn't need programmatic label creation.