Ask most e-commerce operators what they look for in a 3PL and the answers cluster around the same variables: location, capacity, price per pick, and whether the provider can handle their current volume. These are reasonable starting points. But they are also the criteria that lead brands to sign three-year contracts with logistics partners whose technology infrastructure will constrain them within eighteen months.

Warehouse space is fungible. There is more of it than there used to be, and the difference in capability between a well-run conventional warehouse and another is largely one of management quality. Technology, by contrast, is deeply differentiated, and the gap between a 3PL with a genuine, owned technology stack and one running a generic licensed WMS is operational in nature, not cosmetic. It shows up in your inventory accuracy, your ability to scale into new channels, your data quality, and ultimately in the cost and complexity of your own operations.

Own-build versus licensed: why it matters to you

The majority of 3PLs in the market use one of a relatively small number of licensed warehouse management systems. These systems are competent: they track stock locations, generate pick instructions, and produce despatch records. For straightforward fulfilment operations with a single channel and a stable product range, they are adequate.

Their limitations become apparent when requirements move outside the standard configuration. When a new marketplace integration is required. When a client's returns process needs a custom workflow. When carrier selection logic needs to be modified to reflect a new commercial arrangement. When a client's ERP needs to exchange data in a format the system does not natively support. In each of these cases, the 3PL is dependent on their software vendor's roadmap and their implementation partners' availability. Changes that should take days take months. Features that should be possible are not available until the next major release.

A 3PL that owns its technology stack faces none of these constraints. When GRL's clients need a new integration, it is built by GRL's in-house development team. When a workflow needs to change, it changes. When a client's specific operational requirements do not fit a standard template, the template changes. This is not a minor operational convenience. It is the difference between a logistics partner that can grow with your business and one that will require you to grow around it.

The integration question

The practical test of a 3PL's technology capability is the integration question: how does your order data get from your sales channels into their warehouse management system? The answer to this question tells you almost everything you need to know about the operational relationship you are entering.

In a technology-mature 3PL, orders arrive automatically and in real time via direct API integrations with each sales channel. An order placed on your Shopify store at 11:47pm is visible in the WMS at 11:47pm. An Amazon order received during a flash sale is in the pick queue within seconds. There is no human intervention in this process, no file uploads, no morning batch imports.

In a technology-limited 3PL, orders arrive via email, CSV upload, or a portal login that a member of staff checks at intervals. The consequences of this model are not merely operational inefficiency. They include cut-off times that are earlier than they should be, next-day despatch on orders that could have been same-day, and visibility gaps where you cannot tell whether an order has been processed without making a phone call.

The integration question extends to inventory visibility. Can you see your live stock position at any time, from any device, without requesting a report? Can you see which orders are in picking, which are awaiting carrier collection, which have been despatched and with which carrier? This level of visibility is not a premium feature in 2024. It is baseline operational infrastructure. If a 3PL cannot provide it, the operational burden of compensating for its absence falls on you.

The businesses that outgrow their logistics partners are not usually held back by space. They are held back by systems, or the lack of them.

Harry Johnson — Group Vice President, Global Reach Logistics

Technology as a switching cost, in both directions

It is worth being honest about a dynamic that works in both directions: deep technology integration between a brand and a 3PL creates switching costs. The more tightly your systems are integrated. The more your OMS, your ERP, your marketplace connections, and your reporting tools are built around a 3PL's platform. The more difficult and disruptive it is to move to a different provider.

This is a reason to think carefully about which 3PL you integrate deeply with, not a reason to avoid integration. The risks of poor integration, operational failure, data errors, inventory inaccuracy, customer service escalations, are more damaging in practice than the switching cost risk. And the right technology-enabled 3PL should be able to demonstrate, practically, that your data remains accessible and portable throughout the relationship.

The question of data ownership is worth raising explicitly when evaluating 3PL partners. Your order history, your inventory records, your carrier performance data, your returns data. These are your assets. A technology-mature 3PL makes them available to you in formats you can use, on a schedule you control. A technology-limited one may store them in a format that requires their cooperation to extract.

What to look for when evaluating 3PL technology

Below is a practical evaluation framework for assessing a 3PL's technology capability during a selection process. These are questions to ask and demonstrations to request, not criteria to take on trust.

01 Is the technology owned and developed in-house? Ask specifically whether the WMS, OMS, and any carrier management system is proprietary or licensed. If licensed, ask what the process is for adding new integrations or modifying workflows.
02 Request a live demonstration of real-time inventory visibility. Ask to see stock levels update in real time following a simulated stock movement. A genuine real-time system should be demonstrable without preparation.
03 Ask how orders arrive from your specific channels. For each channel you sell through, ask whether integration is via direct API, middleware, or manual upload. Ask about the typical latency between order placement and order appearing in the WMS.
04 Ask about carrier selection logic. How does the system decide which carrier to use for a given order? Is this configurable? Who can change the rules, and how quickly?
05 Ask about data access and portability. How do you access your historical data? In what formats is it available? What happens to your data if you choose to move to a different provider?
06 Ask to speak to an existing client at similar scale. Technology claims are easy to make and harder to validate without reference. A 3PL confident in its technology capability should be able to facilitate this conversation.

The purpose of this evaluation is not to find a 3PL with perfect technology. It is to identify those whose technology model is aligned with where your business is going, not just where it is today. The conversations you have during a 3PL selection process are the clearest signal you will get of how that relationship will function once the contract is signed.