When orders start going out wrong, packing takes longer every month and only one person knows where everything lives, a warehouse management system starts to look like the answer.
Often it is, but the next question is how much of one you need. The term covers everything from a pick list on a clipboard to a six-figure multi-site implementation, and buying too much system is as expensive as buying too little.
What a warehouse management system does
The category has blurred in recent years, and plenty of ecommerce tools now cover part of this ground. So the useful question is which parts of a warehouse management system you need, and which tool covers those parts without dragging in the rest.
Work out which parts you need
Start from the problems you have and the decision gets much simpler:
| Problem | Feature that fixes it | When you need it |
|---|---|---|
| Pickers walking the same route repeatedly | Consolidated pick lists | As soon as more than a handful of orders go out daily |
| Slow picking, inefficient routes | Guided picking | Once one person cannot pick the day's orders comfortably |
| Stock is hard to find, new staff get lost | Bin locations | When your range outgrows what one person can memorise |
| Wrong items going out | Barcode scanning at packing | As soon as anyone other than you packs orders |
| Weight errors and carrier surcharges | Weighing on connected scales | When carrier weight bands affect your costs |
| Wrong service selected at dispatch | Automated carrier selection and label printing | As soon as you offer more than one delivery option |
| Overselling, no visibility of what you hold | Stock levels and low stock alerts | When stock discrepancies start costing you sales |
| Stock split across sites | Multi-warehouse inventory | When you hold stock in more than one location |
| Billing clients for storage and picks | 3PL client billing | Only if you fulfil for other brands |
That is the map. Working out where you sit on it takes six steps, and the first is a week spent measuring your own dispatch.
- Spot the problems you need to fix
Before looking at any software, spend a week measuring. Count your mis-picks, including the ones your packer caught before sealing. Time 20 orders from picking slip to sealed parcel. Note how often someone walks the unit twice because stock isn't where it should be, how long a new starter takes before they can pack unsupervised, and how many orders sat until the next day because the collection went without them. Those five numbers are your requirements document. They are also your baseline for Step 6.
- Match each problem to a feature
Read your five numbers against the table above. What matters is which group they fall into. Problems from the first six rows are dispatch problems: picking accuracy, packing verification, weights and carrier selection. Anything from the last three is an inventory or operating model problem, and that needs a different class of system. Plenty of brands assume they are in the second group and turn out to be in the first.
- Work out how much system you need
Most brands sit in one of three profiles. A single unit with a small team needs picking accuracy and speed, with stock control usually sitting well enough in the sales channel. A growing operation with dedicated packers, say a fashion brand doing 150 orders a day with two packers, needs the same things, but a mis-pick now costs a return, a replacement and the postage on both. Multi-site or 3PL operations need stock visibility across locations and, for 3PLs, client billing, which is genuine warehouse management system territory. Be honest about which you are now, not which you'd like to be in eighteen months.
- Check it connects to your stack
A system that doesn't connect to what you already run just adds work. Check orders arrive automatically from every channel you sell on and land in a single queue. Check your carriers are supported, that the connection covers every service on your account, and ask who maintains those integrations when a carrier changes something. Check which scanners, printers and scales are supported before you buy any of them. Ask all of this during evaluation, before anything goes into setup.
- Compare setup time and cost
Cost is easy to compare and usually the least important number. Implementation time matters more: days for dispatch-focused tools, months for a full warehouse management system, and that time is paid for in your team's attention. Check contract length, since annual commitments are common at the heavier end, and check whether pricing is per user, per order, per location, per feature or a flat tier. Training time is the number that compounds, because you pay it again for every person you hire.
- Trial it on real orders
Live orders are the real test. Run a week of real dispatch through any system you're serious about, during a normal trading week, then measure the same five numbers from Step 1 and compare them against your baseline.
Would give 10 stars if I could. Alex and the team at Zenstores have pulled out the stops to help our warehouse team be more efficient. Zenstores added additional functionality to add stock locations to our picking sheets. It's a great app that ties in Royal Mail and DPD into one system that integrates with Shopify in one click. Love it! Keep up the good work
VELCRO Brand
Frequently Asked Questions
What is a warehouse management system?
Software that controls the movement of stock through a physical space: receiving goods in, storing them, picking items for orders, packing them accurately and dispatching them. Fuller systems add inventory control on top, tracking what you hold and where across locations.
Do small ecommerce brands need a warehouse management system?
Often not a full one. Most small brands' problems sit in dispatch, which means pick lists, bin locations, barcode verification and carrier automation. Those are available without a full warehouse management system implementation, and stock control can wait until discrepancies start costing you sales.
Our guide to setting up a pick and pack process for Shopify covers the first steps.
What's the difference between a warehouse management system and shipping software?
A warehouse management system manages stock through a space, including what you hold and where. Shipping software manages orders through dispatch: picking, packing, carrier selection and labels. They overlap on picking and packing, which is why the categories get confused.
How long does a warehouse management system take to set up?
Anything from a few days to several months, depending on scope. Dispatch-focused tools go live quickly because they work from your existing orders and product data. Full warehouse management implementations involve stock takes, location mapping and integration work, and that's before the team learns it.
Can Shopify manage bin locations?
Shopify tracks stock by location, meaning a warehouse or store rather than a shelf or bin within one. For bin level detail you need either a warehouse management system or dispatch software that supports bin locations, such as Zenstores.
Do I need barcode scanning?
If anyone other than you packs orders, it is recommended. Checking by eye works while one person knows every product, and stops working the moment that isn't true. Scanning each item against the order catches the mistake at the packing bench, before it reaches the customer.
Where does Zenstores fit?
Zenstores covers the dispatch half of the table: guided picking that sequences the route through your unit, bin locations so new starters find stock without asking, barcode scanning at the bench to check each item against the order, connected scales that capture weight before the label prints, and carrier and service assigned automatically by rule. It usually goes live within days. What it doesn't do is manage your stock, so if your problems came from the last three rows you need a full warehouse management system or a dedicated inventory tool alongside.
See how pick, pack and dispatch works in Zenstores.
What other systems should I consider?
For multi-site, 3PL or full warehouse management needs, look at Mintsoft, which is aimed at 3PLs and multi-client operations, Peoplevox, built for retail and ecommerce fulfilment operations, and Helm, which covers order and fulfilment management for multichannel retailers.
For inventory alongside Zenstores, Unleashed adds manufacturing and purchasing and integrates directly, while Brightpearl, Cin7 and Katana each cover inventory and order management, with Katana aimed at brands that make what they sell. Single-channel Shopify brands can often get by on Shopify's built-in stock tracking and locations.
This was last reviewed September 2026.
