A 3PL (third-party logistics provider) is a company that stores your inventory, packs your orders and ships them to your customers. A 4PL (fourth-party logistics provider) is a company that manages your logistics providers for you, often including one or more 3PLs, and it may not run a warehouse of its own.
So the two aren't competing versions of the same service. A 3PL does the physical work. A 4PL coordinates the companies that do it. If you sell online and ship parcels to customers from one place, a 4PL has very little to coordinate, and the choice in front of you is whether to keep packing orders yourself or hand them to a 3PL.
What is a 3PL?
3PL stands for third-party logistics: an outside company that handles storage and shipping for you. In ecommerce, a 3PL is a fulfillment company. You send it your inventory, it connects to your store, and when an order comes in, its warehouse team picks the items, packs the box and hands it to a carrier. If fulfillment is a new term, here's what ecommerce fulfillment covers from order to doorstep.
Depending on the provider, a 3PL can also receive your inbound stock, process returns and assemble kits or bundles. You still choose what to stock, decide when to reorder and manage the relationship with the 3PL.
What is a 4PL?
4PL stands for fourth-party logistics. A 4PL is a manager rather than a doer. It plans how goods move through your supply chain, then hires and oversees the companies that handle them: warehouses, carriers, freight forwarders (companies that book and arrange shipping, usually for international freight) and customs brokers (who file the paperwork to clear imports). The term is used loosely, and you'll also see the same role called a lead logistics provider, or LLP.
What you get from a 4PL is one point of contact and one view of everything moving through your supply chain. Behind that contact there might be two 3PL warehouses, several carriers and an ocean freight forwarder, each on its own contract. The 4PL chooses those providers, tracks how they perform and keeps information moving between them. A 4PL may own no warehouses or trucks at all, because its job is the coordination.
3PL vs 4PL at a glance
3PL | 4PL | |
|---|---|---|
What it does | Stores, picks, packs and ships your orders | Plans your logistics and manages the providers that run it |
Who does the daily work | The 3PL's own warehouse staff | Other companies the 4PL hires and oversees, often including 3PLs |
Warehouses | Operates the warehouse your stock sits in | May own no warehouses or trucks |
How it charges | Fees tied to the work it does, such as receiving, storage, pick and pack, and shipping | Usually a fee for planning and management. How it is set, and how the providers doing the work are paid, depends on the contract |
Your role | You manage one fulfillment partner and decide what to stock | You manage the 4PL, which manages everyone else |
Who it fits | A brand that wants orders packed and shipped without doing it in-house | A business with several warehouses, suppliers or carriers that need one party coordinating them |
If you want to know how those 3PL fees are put together, our 3PL fulfillment pricing guide explains the fee categories you'll see on a typical quote.
What this means for a one-to-three-person brand
A 4PL earns its fee by coordinating. That coordination is worth paying for when several moving parts have to stay in sync: stock spread across regions or countries, freight arriving from several factories, and a mix of carriers and contracts that someone has to manage.
If you run a Shopify store and ship parcels from your garage, a storage unit or a single 3PL warehouse, that coordination job doesn't exist yet. Your supply chain is one stock location and a carrier pickup. Bringing in a 4PL would add a management layer, and the cost of paying for it, above a single provider it has little reason to manage.
The decision that matters now is the earlier one: keep packing orders yourself, or hand fulfillment to a 3PL. Our guide on how to choose a 3PL walks through what to compare and what to ask before you sign. If you're still weighing whether to hold inventory at all, it's worth reading how dropshipping compares with third-party fulfillment first.
A 4PL might become worth a conversation later if your business starts to look like this:
- You keep inventory in several warehouses, or in more than one country, and need them run as one network.
- You bring in freight from several suppliers and have to coordinate forwarders, customs and delivery into your warehouses.
- You use more than one 3PL at the same time and spend real hours keeping them in step.
- You'd rather pay one company to run all of your logistics than build a logistics team in-house.
If none of that describes your business today, a 4PL isn't a question you need to answer yet.
Related questions
What does 3PL stand for?
Third-party logistics. The "third party" is the outside company that sits between you and your customer and handles storage, packing and shipping on your behalf.
Is FedEx a 3PL?
Not in the sense this page uses the term. FedEx, UPS and USPS are carriers: they pick up a packed parcel and deliver it. A 3PL packs the order and then hands it to a carrier like these. The line blurs for large shippers because some carriers also sell broader services; FedEx, for example, offers logistics services beyond parcel delivery. For an online store, the simple version holds: the 3PL packs, the carrier delivers.
What about 1PL, 2PL and 5PL?
These labels are loose, and sources define them differently. Roughly, a 1PL is a business moving its own goods, a 2PL is a carrier hired for transport, and 5PL is sometimes used for providers that manage supply chains at an even broader level than a 4PL. For an online store, 3PL is the label that matters.