ShipStream Integration FAQs: keep your warehouse running, add real multichannel OMS
ShipStream is a warehouse management platform supporting order fulfillment operations for growing brands and 3PLs. The InfiPlex™ Inventory & Order Management System (OMS) aggregates every sales channel into one queue, keeps inventory synced everywhere in real time, and hands ShipStream the orders that are ready for warehouse execution.
The InfiPlex ShipStream integration connects your existing ShipStream account to the InfiPlex Inventory & Order Management System. InfiPlex aggregates orders from every sales channel you run, sends fulfillment-ready orders to ShipStream for pick, pack, and ship execution, and pushes the resulting tracking back out to the originating marketplace or storefront — all while managing real-time inventory sync across channels that ShipStream itself doesn't handle.
Yes — this integration connects an existing ShipStream warehouse account to InfiPlex, whether that's your own warehouse or a 3PL that fulfills on your behalf using it. If you don't use ShipStream, InfiPlex's own order and shipping workflow already covers 100+ carriers directly.
Setup is quick and simple: our USA-based team links your ShipStream account through its API during onboarding. There's nothing to install and no developer needed.
Most sellers are live in 1–3 business days. The connection itself completes quickly; the rest of the window goes to confirming which order types route to ShipStream versus InfiPlex's own fulfillment or carrier connections.
No — your warehouse team keeps using ShipStream's configured workflow exactly as they know it. InfiPlex changes what happens before an order reaches ShipStream (multichannel aggregation and inventory sync) and after (tracking distributed back to the right channel).
Section 2 of 5 · How they connect
How Orders Flow Between InfiPlex & ShipStream
The mechanics of what moves where, and why it's organized this way.
InfiPlex does. Orders from every connected channel — Amazon, Walmart, Shopify, and 130+ more — pull into the InfiPlex OMS about every 15 minutes, giving you one aggregated queue rather than configuring ShipStream to connect to each channel independently.
Once an order is ready to ship, InfiPlex sends it to ShipStream, which then handles picking, packing, and shipping using your warehouse's existing configuration.
Automatically — once ShipStream completes the shipment and generates a label, the tracking number flows back through InfiPlex to whichever channel the order originally came from.
Yes — stock levels in ShipStream feed into InfiPlex's master inventory pool, which reconciles them against every other channel and location in real time.
Yes — many sellers route specific SKUs, warehouses, or order types through ShipStream while using InfiPlex's direct carrier connections or a different 3PL for the rest, based on whichever fits that order best.
Section 3 of 5 · Warehouse execution
Pick, Pack, Ship & Returns
What ShipStream handles once an order reaches it, and how that data returns to InfiPlex.
Yes — ShipStream's warehouse-floor workflows and configuration apply exactly as they do today. InfiPlex hands off orders for ShipStream to fulfill; it doesn't change how ShipStream's warehouse operations run.
Yes — automation rules and configurations you've already built in ShipStream continue to apply to orders InfiPlex sends over, with no changes needed on the warehouse floor.
Return status and receiving data from ShipStream can flow back through InfiPlex to update the order record and, where applicable, adjust inventory once a return is received back into stock.
Yes — a 3PL running ShipStream as its WMS can connect through InfiPlex's 3PL Connector program, giving each of its brand clients their own Site Area while fulfillment stays centralized on ShipStream.
Yes — InfiPlex's multi-warehouse routing handles mixed setups, sending orders to ShipStream-run locations, your own warehouse, or other 3PLs based on the rules you configure, all reconciled against one inventory pool.
Section 4 of 5 · Which to use
When to Use ShipStream vs. InfiPlex's Built-In Fulfillment
Both are available — here's how sellers typically decide.
No — InfiPlex includes its own order and shipping workflow across 100+ carriers, so ShipStream isn't required. This integration exists for sellers who already run their own warehouse on ShipStream, or who fulfill through a 3PL that does.
It works alongside it. InfiPlex isn't trying to replace ShipStream's warehouse execution — it's solving the multichannel order aggregation and real-time inventory sync problem that sits upstream of fulfillment.
Yes — because InfiPlex owns the channel connections rather than ShipStream, switching warehouses or 3PLs later doesn't require re-connecting every marketplace; only the fulfillment routing changes.
Yes — the 3PL Connector program gives each client their own Site Area with their own channel mix, all routed to a ShipStream-run warehouse where applicable.
ShipStream connects on every InfiPlex plan. Basic Starter is $49.99/month with up to 2,000 SKUs at $0.50 per order; Growth Starter is $499.99/month with 10,000 SKUs and 1,000 orders included ($0.10 per additional order); Growth Pro is $999.99/month with 100,000 SKUs and 10,000 orders included ($0.05 per additional order). Full details are on the Pricing page.
Yes — your existing ShipStream subscription is billed by ShipStream as usual; InfiPlex's plan and per-order pricing are separate and cover the multichannel OMS layer.
Growth packages carry a 3-month minimum commitment and Partner packages a 12-month term; Basic Starter is month-to-month. Schedule a demo and we'll walk through how InfiPlex and your existing ShipStream setup fit together.
ShipStream's own reporting continues to operate independently; InfiPlex's connection focuses on order and inventory data exchange rather than replacing ShipStream's built-in analytics.
Yes — this integration works whether ShipStream is running at a third-party 3PL fulfilling on your behalf or at a warehouse you operate directly.
Connect the rest of your stack
Pair ShipStream with the systems you already run
InfiPlex connects ShipStream with 130+ marketplaces, carts, shipping platforms, 3PLs, WMS, and ERP systems — and our Growth Packages include building new API integrations you need at no additional cost.
Think of ShipStream as the warehouse execution layer, and InfiPlex as the layer above it that aggregates every sales channel into one order queue and keeps inventory accurate across all of them. InfiPlex sends orders that are ready to fulfill over to ShipStream, your warehouse team picks, packs, and ships them using ShipStream's configured workflow, and InfiPlex pushes the resulting tracking back out to whichever marketplace or storefront the order came from.
The InfiPlex ShipStream sync rail: orders ready to fulfill flow from the OMS into ShipStream for pick, pack, and ship execution; ShipStream returns shipment confirmations and inventory levels; and InfiPlex pushes tracking out to whichever sales channel the order came from — while inventory stays reconciled across every connected channel in one pool.
Ready to put ShipStream on autopilot?
Your OMS is typically live in 1–3 business days, and our USA‑based team handles onboarding with you — no coding required.
Our team answers real questions from ShipStream sellers every day. Contact us, email info@infiplex.com, or call 888‑770‑0857 and we’ll walk you through your exact setup — we can also add this page’s answer for the next seller who asks.
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