Inventory and orders
Stock by SKU and location, inbound shipments, open orders and their status. Clients create orders and ASNs themselves, including returns and kitting requests.
We engineer software around how your operation actually works.
3PL Software Development
Client portals and billing for 3PL warehouses
Your WMS knows what happened in the warehouse. Your clients still email to ask, and your team still builds their reports and invoices by hand. Our 3PL software development services give each client a portal with their own data and billing that follows their contract.
We connect your existing systems and build the missing pieces. You own what we build.
15+
years in business
100+
systems delivered
5+ yrs
avg. client relationship
Admin load
Where admin time goes
None of this is warehouse work. It's admin that grows with every new client.
| Day | What happens | Hours lost to |
|---|---|---|
| Monday | Clients send orders as CSVs and spreadsheets | Uploading and fixing files |
| Tuesday | "Where's my shipment?" emails pile up | Checking three systems and replying |
| Wednesday | A new client wants a different rate card | Building another billing spreadsheet |
| Thursday | Weekly reports are due | Exporting and formatting, client by client |
| Friday | Billing close | Matching storage, picks and extras to each client's terms |
Honest choice
Add to your WMS or replace it?
Most 3PLs don't need to replace their WMS. If it handles the floor well, we build the client portal, billing and connections on top of it. If the WMS can't hold several clients with their own rules, we build a 3PL warehouse system as well. WMS page → We don't resell or configure packaged 3PL software; we design and build to your contracts.
Portal
Client portal
3PL software development usually starts here. Each client logs in and sees only their own data.
Shipment tracking
Our shipment tracking software development pulls carrier status into one view through carrier APIs and shipping platforms (XPO Logistics, EasyPost, DHL, FedEx). Late shipments raise an alert.
Reports and exports
The reports clients ask for every week, available any time, with their own filters and scheduled email delivery.
Invoices with the detail behind them
Each invoice line links to the activity that caused it: storage days, picks, packaging, special handling. Clients can check a charge without opening a ticket.
Billing
Billing that follows each client's contract
Every client has a different rate card. Storage by pallet or by bin, picks by order or by unit, minimum monthly fees, special projects. We build a billing engine where each client's terms are set up once. Warehouse events from your WMS turn into charges automatically, and invoices go to your accounting system or ERP at month end.
Your team reviews exceptions instead of rebuilding the bill from memory. Charges that used to slip through, like extra packaging or rush handling, get captured.
Onboarding
Onboard a new client without new code
Clients send data in every format. We build the connections once, so the next client with the same setup is configuration, not development:
- ecommerce platforms and marketplaces for online sellers
- CSV and spreadsheet upload with field mapping saved per client
- API access for clients with their own systems
- EDI and other formats larger clients require, set up per client
A new client then means their SKUs, rates, report settings and users.
KPIs
SLA and KPI reports
Order accuracy, ship-on-time rate, dock-to-stock time and inventory accuracy, for every client and per period. Your account managers walk into reviews with numbers, not a spreadsheet they built the night before.
Trust
Accurate client data
Showing clients wrong stock or a bad ETA is worse than showing nothing. The portal reads from the same records your team uses, flags data that's out of date, and shows clearly when a carrier hasn't updated a shipment. You decide what each client can see and when.
Integrations
Integrations
- Your WMS and TMS for stock, orders, activity and loads. TMS →
- Accounting or ERP for invoices and payments
- Ecommerce platforms and marketplaces for client orders
- Carriers and shipping platforms: XPO Logistics, EasyPost, DHL and FedEx on past projects
- EDI for retail and enterprise clients
Each connection is monitored, so a failed import shows up before the client notices.
Process
How we work
- 01
One client's month
We follow their orders, reports and invoice from start to finish and mark every manual step.
- 02
Scope and estimate
Usually the portal and billing for your biggest clients first.
- 03
Prototype
Clickable portal screens your account managers and one friendly client can try.
- 04
First release on real data
Billing runs next to your spreadsheet for one cycle, so you can compare every line.
- 05
Client by client rollout
Then support, new reports and new connections as you grow.
Scope or cost changes are agreed before work starts.
Cost
Cost and timeline
The budget depends on how many clients and rate card types you have, how many systems we connect, and whether you need a full 3PL warehouse system or only the layer on top. A portal on your current WMS is the lightest start; portal plus billing, or a full 3PL system with WMS, is a larger build. You get a written estimate after we review one client's month.
Security
Security and ownership
Each client's data is separated, and every user belongs to one client account. Role-based access, a log of who changed a rate or an invoice, encrypted data and backups. Automated tests on billing rules before each release. You own the code and documentation. We support the system after launch. AI helps us code and test faster. Our engineers review every change and answer for it.
Proof
Related projects
We don't have a published 3PL case yet. Adjacent logistics work that transfers:
Auto-transport logistics · CRM and quoting
Movewheels
Logistics CRM with quoting and carrier connections.
View case study →You see working software at each stage, agree any change in scope or cost, and own the code when we're done. Related: WMS · TMS · Route optimization · Logistics hub
Engagement
Ways to work with us
One release, fixed scope
The portal for your top clients, or the billing engine.
Dedicated team
For a 3PL platform that grows with every new client.
Engineers for your IT team
We add features to the system you already run.
Awards & Recognition
CLIENT REVIEWS
What operations teams say about systems we ship
“We know our project is complicated because we need to integrate and make different systems work. The work meets our expectations, and we haven't identified any data gaps.”
“Attract Group delivered a high-quality product on a tight deadline. They continue to impress with their knowledge on all things related to development. They're very professional and easy to communicate with.”
“I'm most impressed with Attract Group's commitment. The work meets our expectations, and the new app offers great flexibility for future improvements and better customer service.”
01–03 / 03 CURATED · 39 TOTAL ON CLUTCH
FAQ
3PL software FAQ
How much do 3PL software development services cost?+
It depends on clients, rate cards, integrations, and whether you need a full system or the layer on top of your WMS. You get a written estimate after we review one client's month.
How long does it take?+
A client portal on top of your WMS usually takes a few months. Billing adds more time, and it runs next to your current process for one cycle before you switch.
Can every client have different pricing?+
Yes. Rate cards, minimums and special charges are set per client, and changes apply from a date you choose.
Can clients see only their own inventory and orders?+
Yes. Every user belongs to a client account, and access is limited to that client's data. You can give clients different permission levels.
Can the portal explain each charge on an invoice?+
Yes. Each invoice line links to the warehouse activity behind it, so clients can check the detail themselves.
How fast can we onboard a new client?+
For a client using a connection we've already built, setup usually takes a few days. Unusual formats may need a small mapping job first.
Do we need to replace our WMS?+
No. The portal and billing sit on top of your current WMS. If the WMS itself is the bottleneck, see our WMS page.
Can you connect our clients' online stores?+
Yes. We build connections to ecommerce platforms and marketplaces, so orders arrive without CSV uploads.
What should we look for in a 3PL software development company?+
Experience with activity-based billing, client-level permissions and WMS connections, plus a clear plan for who supports the portal after launch.
How long did last month's billing close take?
Show us one client's month: their orders, reports and invoice. We'll map what we can take off your team's plate.
Or call us directly:+1 888-438-4988