3PL vs 4PL vs Contract Logistics: Which One Does Your Brand Need?

In the 3PL vs 4PL comparison, a 3PL runs the warehouse work for you: it receives your inventory, stores it, picks and packs each order and hands the boxes to carriers. A 4PL manages the providers that do that work, such as your 3PLs, carriers and freight forwarders, and you call the 4PL when something goes wrong anywhere in the chain. Contract logistics is outsourced logistics under a long-term agreement that fixes scope, pricing and performance targets, and most 3PL relationships run on one. If your products ship to customers in parcels from one stock of inventory, you need a 3PL that runs order fulfillment for ecommerce and retail from its own building.

3PL vs 4PL: what's the difference?

A third-party logistics provider operates the warehouse and the people in it. Our guide to how a 3PL works and when to bring one in covers what it takes off your plate. A fourth-party logistics provider sits one level up. It usually owns no warehouses or trucks. It picks and manages the companies that do, runs the data and planning across them, and reports to you as one point of contact.

A 4PL earns its fee by coordinating providers. If you have five warehouses on three continents, an ocean forwarder, a customs broker and a dozen carriers, someone has to plan inventory across all of them and hold each one to its numbers. A 4PL does that job so you don't have to staff a logistics department. If you have one warehouse partner and a few parcel carriers, that coordination layer adds a fee and a second phone call without adding a pair of hands on your orders.

What is contract logistics?

Contract logistics means handing part or all of your logistics to an outside provider under a written agreement that runs for a set term. The provider is usually a 3PL, and the work covers warehousing and fulfillment, often with transportation and returns. The name describes how the deal is structured, so a 3PL and a contract logistics provider are frequently the same company.

Spot or on-demand logistics is booked job by job. Under a contract, you commit volume and a term, and the provider commits space, labor, systems and performance targets. A contract logistics agreement covers:

• Scope. Which services, SKUs, channels and shipping methods the provider handles, and what counts as extra work.
• Term and renewal. How long the agreement runs and what notice either side gives to renew or leave. Dedicated warehouses built or leased for one client run on longer terms than shared, multi-client buildings.
• Pricing. The rate card for receiving, storage, picks, packaging and value-added work, plus how and when rates change.
• Performance targets. Order accuracy, ship-on-time against the cutoff, inventory accuracy and dock-to-stock time, each with a definition and a reporting period.
• Forecasts. The volumes you expect, so the provider staffs and slots for them, including peak season.
• Liability and exit. Who pays for lost or damaged inventory, and how your stock and data move out if you leave.

Read the pricing and performance sections hardest. Fees that aren't named on the rate card show up later as invoice lines you didn't plan for, and a target without a definition and a reporting period gives you nothing to hold the provider to.

What about 1PL, 2PL and 5PL?

A 1PL, or first-party logistics, is the brand running its own logistics. You own or lease the warehouse, hire the staff and run the trucks or the parcel accounts yourself.

A 2PL is a carrier you hire to move goods on one leg, such as a parcel carrier, a trucking company or an ocean line. It owns the trucks, planes or ships and moves what you hand it, and the warehouse work stays with you or your 3PL.

A 5PL manages whole networks of supply chains, usually for very large shippers, and the term means different things at different providers. A brand shipping parcels from one or two warehouses has nothing for a 5PL to manage.

When does a brand need a 4PL?

You need a 4PL when coordinating providers has become a full-time job for several people. These are the usual signs:

• You run inventory in several 3PLs or regions, and nobody owns the plan across them.
• You import from overseas factories and juggle forwarders, customs brokers, drayage and inland freight on every shipment.
• You sell in several countries, each with its own warehouses and carriers.
• Your logistics spend is large enough that a few points of savings across all providers would pay a management fee.

Most parcel-sized consumer brands run a much simpler setup. They sell through Shopify, Amazon and a few retailers, keep one stock of inventory and ship parcels plus the occasional pallet. For that operation the right partner is a 3PL that runs both direct-to-consumer and retail orders from the same inventory, and that books the parcel, LTL and FTL shipments itself. You talk to the people running your orders, and there's no middle layer to pay. KSP Integrated Logistics is coming soon to solve this type of need.

What should you look for in a 3PL?

Once you know you need a 3PL, compare providers on how they run your orders, not on how many services they list. Ask every 3PL on your shortlist these three things:

1. The daily cutoff and the pick and pack time. Get the hour, the time zone and what happens to an order that lands after it.
2. Order accuracy, counted on whole orders. A rate counted per pick misses a box that ships short or to the wrong address. Ask over how many orders the rate was measured.
3. Who answers when something breaks, and how fast. Get the response time in writing and the name of the person who owns your account.

Our guide to choosing a 3PL partner covers the rest of the evaluation, from the RFP to the floor tour.

How do KSP's numbers answer those checks?

KSP is a 3PL. We run the warehouse, the pick floor and the shipping dock ourselves, in one building that ships orders to brands' customers nationwide:

• Cutoff: orders in by 2 PM CST ship the same day, and an order gets picked and packed in under 30 minutes.
• Accuracy: 99.999% order accuracy across 32.1M orders, counted on whole orders.
• Response: a 2-hour SLA on issues, handled by an account manager who works on the floor.
• Space: about 225,000 sq ft of climate-controlled, FDA-registered storage, with a 50,000 sq ft kitting floor in the same building.
• Pricing: before you sign, we walk you through an invoice and your program line by line, so every fee on the rate card has a name and a reason.

Frequently asked questions