Automate your multi-vendor marketplace

Onport is an all-in-one multi-vendor marketplace platform. Onport enables product marketplaces to streamline and automate their inventory, orders, payments, and shipping operations. Designed to be flexible, Onport can accommodate those seeking an out-the-box solution as well as those who require a more bespoke implementation, by using a headless approach. With Onport, marketplaces can scale with confidence and create truly unique customer experiences. Onport is trusted by brands such as Ad Hoc Atelier, Naduvi as well as over 200+ other companies.

Onport logo

Date Founded



London, UK

Shipping company type


Number of customers



With Onport, import product catalogs, send orders, and sync tracking information, seamlessly. Also, access a diverse range of integrated solutions, from frontend platforms to payment solutions, and a vast API library to manage your marketplace operations from a single platform.

Inventory syncing

Automatically split an order into the different fulfillment flows between Vendors, In-House, or 3PL.

Order routing

Define a fully flexible network of Carriers, customer shipping rates, and shipping cost allocation.


Automatically calculate commission rates for all items sold and import cost prices in batches from vendors.


Seamlessly upload items to the Marketplace, while keeping inventory levels and pricing in sync.

Additional EasyPost partners

Acumatica logo
WeSupply logo
inFlow Inventory Logo logo
XPSship logo
Insight Works logo
Loop logo
ReturnLogic logo
PrattBox logo
SKULabs logo
SmartShyp logo
Linnworks logo
Bandzoogle logo
And More

Small business shipping rates

Through EasyPost, small businesses access USPS Commercial Pricing and UPS marketplace rates for domestic and international shipments. Spend less on shipping with trusted carriers using our Create Label interface.

Flexible Shipping APIs for any online merchant

EasyPost's best-in-class Shipping APIs provide end-to-end flexibility and more control over parcel shipping and logistics processes for:

  • Ecommerce retailers
  • Fulfillment centers
  • Marketplaces
  • Enterprises
  • And more!

Save time with simple shipping

Save up to 88% on retail rates using our modern Shipping API, Tracking API, and Address Verification API for USPS, FedEx, UPS, DHL, and many more.