Shopify · Fulfillment Order Routing
Shopify assigns each new fulfillment order from a ranked list of Locations. That works with one warehouse. The InfiPlex™ OMS picks up where that list stops: it moves each Shopify fulfillment order to the Location your rules say, by SKU, by product tag, by which Location actually has stock, or by a priority order you set. It works with Shopify as your only connected channel, and it is included on every InfiPlex plan.
Where the ranked list runs out
Shopify's built-in order routing ranks your Locations and assigns each fulfillment order to the first one that can fill it. For a single warehouse that is all you need. It has no way to say that one SKU always ships from the 3PL while another always ships from your own shelf, that anything tagged drop-ship goes to the supplier, or that orders should fall to a second Location only when the first is out of stock for that item.
Sellers who outgrow the ranked list end up reassigning fulfillment orders by hand in the Shopify admin, order by order, or writing rules into a shipping app that only sees the order after Shopify has already picked the wrong Location. InfiPlex works at the fulfillment order itself. When Shopify creates the fulfillment order, InfiPlex evaluates your rules and moves it to the Location you want before anyone at the warehouse sees it. The technical detail of how Shopify's Fulfillment and FulfillmentOrder objects behave, and how InfiPlex moves the assigned Location, is covered in the Fulfillment Orders and multi-location routing guide.
Set once, applied to every order
Rules are defined once in the OMS, then applied to every fulfillment order Shopify creates, including orders that arrive from a marketplace once you connect one.
InfiPlex connects as a Shopify Custom App and reads your existing Shopify Locations. Each Location maps to an InfiPlex warehouse, whether that is your own building, a 3PL, or a drop-ship supplier.
Route by SKU, by product tag, by which Location currently has stock, or by a fixed priority between Locations. Set one Location as the default for anything that does not match a rule.
When Shopify creates a fulfillment order, InfiPlex evaluates the rules and moves it to the Location they name, rather than the one Shopify's ranked list picked.
Your warehouse, 3PL, or supplier picks and packs from the assigned Location. Tracking flows back to Shopify, and inventory across every Location stays in sync.
The rule types
Rules can be combined, and they evaluate in the order you set. Unmatched orders always land at the default Location, so nothing is left unassigned.
| Rule | What it does | Typical use |
|---|---|---|
| SKU | Sends a specific SKU or list of SKUs to a named Location | Bulky items that only the 3PL stocks |
| Product tag | Routes any product carrying a Shopify tag | Tag drop-ship items to the supplier Location |
| Stock by Location | Ships from whichever Location has the item in stock, in your priority order | Two warehouses carrying overlapping SKUs |
| Priority order | A fixed order of Locations to try | In-house first, 3PL second |
| Default Location | Catches anything no rule matched | Keeps every order assigned |
Who it is for
These are the setups where a ranked Location list is not enough.
Send some SKUs to the 3PL and keep others on your own shelf, or send everything to the 3PL until it is out of stock and then fall back to in-house. See order management for brands shipping through a 3PL.
Tag drop-ship products in Shopify and InfiPlex routes them to the supplier Location automatically, while stocked items go to your warehouse.
Stop manually reassigning orders the day a second warehouse or 3PL goes live. Add the Location, set the rule, and orders start landing there.
You do not need a marketplace connected. The Location Router works with Shopify as the only channel, and the same rules carry over when you add one later.
Part of the same system
The Location Router is one part of the InfiPlex Shopify integration, not a separate product. Because every plan includes multi-warehouse and drop-ship, the routing rules are available from Basic Starter up.
If you add a marketplace, marketplace orders pull into Shopify and are routed by the same rules. If you move fulfillment to a 3PL, the 3PL's Location becomes one more destination the rules can name; InfiPlex connects to the 3PL's own system through integrations such as Extensiv, ShipHero, VeraCore, and ShipStation. And because InfiPlex tracks inventory per warehouse rather than as a single total, a stock-by-Location rule always reflects what each Location actually has. That per-warehouse model is explained in Multichannel Inventory Sync.
Common questions
What sellers ask before setting up routing rules.
No. The Location Router works with Shopify as your only connected channel. Many sellers use InfiPlex first for routing and inventory across two Locations, then connect a marketplace later. When they do, marketplace orders pull into Shopify and are routed by the same rules, with no reconfiguration.
No. Multi-warehouse and drop-ship support is included on every InfiPlex plan, and the routing rules are part of that. Basic Starter at $49.99 a month, month to month, includes it. The only add-on InfiPlex sells is the 3PL Connector, which is a different product built for 3PL operators running client integrations, not something a brand needs for routing.
Yes. A stock-by-Location rule ships from whichever Location has the item available, in the priority order you set. Because InfiPlex keeps inventory per warehouse rather than as one combined number, that check reflects what each Location actually has on hand, and it updates as orders come in and as the warehouse or 3PL reports counts back.
It goes to the default Location you set when configuring the router. Nothing is left unassigned, and nothing falls back to Shopify's ranked list unless you choose that Location as your default. You can see which rule, if any, placed each order in the OMS, which makes it easy to spot a SKU that needs its own rule.
Yes. The 3PL's Shopify Location maps to an InfiPlex warehouse like any other, and rules can send specific SKUs, tags, or overflow to it. InfiPlex connects to the 3PL's warehouse system so orders reach their WMS and tracking and inventory come back. For the brand-side view, see order management for 3PL fulfillment.
Shopify creates a separate fulfillment order for each Location an order needs, and InfiPlex routes each of those fulfillment orders independently. So an order with one item that only the 3PL stocks and one item that only your warehouse stocks results in two fulfillment orders, each moved to the right place, each with its own tracking sent back to Shopify.
Go deeper
The pages most sellers read next.
Set the rules once and let InfiPlex apply them to every fulfillment order. Live in 1 to 3 business days, with our USA-based team handling onboarding.
Our team configures routing rules across 3PLs, in-house warehouses, and drop-ship suppliers every week. Contact us, email info@infiplex.com, or call 888-770-0857 and we'll map your Locations together.
Shopify is a trademark of Shopify Inc. All other marketplace and product names are trademarks of their respective owners. Pricing shown is InfiPlex list pricing at the time of publication and is subject to change; see the Pricing page for current plans. ©2026 InfiPlex. All rights reserved.
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