● Built for third-party logistics

The warehouse management system built for 3PLs.

Run every client from one platform — separate data, per-client rate cards, and automated billing for every unit you handle and every day you store it. Operator console, branded client portals, and a barcode scanner, on one ledger.

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Per-client isolation · billable-event ledger · Shopify, QuickBooks & EasyPost included

The basics

What is a 3PL warehouse management system?

A 3PL warehouse management system is WMS software for third-party logistics providers who store and fulfil goods for multiple client brands at the same time. On top of standard receiving, putaway, pick, pack, and ship, it handles what a 3PL specifically needs: data kept separate per client, per-client rate cards, automated billing for every handled unit and storage day, and a portal each client logs into.

The hard part for a 3PL isn’t moving boxes — it’s charging correctly for them. Storage days, accessorials, and value-add work are easy to miss, and missed charges are pure margin lost. StowBill is built so that if it happened in the warehouse, it lands on the right client’s invoice.

Made for multi-client ops

Everything a 3PL needs, on one tenant.

Generic WMS software treats every order the same. StowBill treats every client as its own world — isolated, priced, and invoiced separately.

Per-client everything

Each client gets its own catalog, rate card, suppliers, stores, and branded portal — kept separate without you maintaining a single careful query.

Bill every activity

Receiving, putaway, pick, pack, ship, storage per day, and value-add each post a priced event the moment they happen, against that client’s rate card.

Tenant isolation

Row-level security in the database means one client can never see another’s stock, orders, or invoices — isolation enforced by design.

Many sites, one tenant

Run several warehouses and dozens of clients from one system, with stock and labour tracked per location.

Shopify, EasyPost, QuickBooks

Orders flow in from Shopify, EasyPost buys labels and tracking, and each client’s invoice pushes to QuickBooks — included, not add-ons.

Audit-grade inventory

Stock is an append-only ledger with a database oversell guard, so on-hand is always reconcilable per client.

Billing correctness

If you handled it, you billed it.

Most 3PLs bill from what someone remembers to log. StowBill bills from what actually happened on the floor — every event priced against the right client’s rate card, the moment it completes.

The result is the charge you can defend: never double-billed, never billed late, and never quietly absorbed as lost margin.

ReceivingPutawayPickPackStorage / dayShipping markupReturnsValue-add

3PL WMS vs generic WMS

Why a generic WMS falls short for 3PLs.

Capability	Generic WMS	StowBill
Separate data per client
Per-client rate cards & invoicing
Storage billed automatically per bin / day
Branded self-serve customer portal
Charges captured at the moment work happens
One tenant, many warehouses & clients	limited

Questions

3PL WMS, answered.

What is a 3PL warehouse management system? +

A 3PL warehouse management system is WMS software built for third-party logistics providers that store and fulfil goods for multiple client brands at once. Beyond standard receiving, putaway, pick, pack and ship, it adds the things a 3PL needs: data kept separate per client, per-client rate cards, automated billing for every handled unit and storage day, and a portal each client can log into. StowBill is built around exactly this.

How does 3PL billing work in StowBill? +

Every operation on the floor emits a priced event the instant it completes — receiving, picks, packs, shipments, value-add — and storage is snapshotted nightly per occupied bin. Each event is priced against that client’s rate card on an append-only ledger, then rolled up into a monthly invoice you push to QuickBooks in one click. Because the log is idempotent, nothing is billed twice or billed late.

Can one client see another client’s data? +

No. Isolation is enforced in the database with row-level security plus per-client scoping, so access is restricted whether data is reached through the console, the client portal, or the API — it doesn’t depend on every query being written perfectly.

Do my clients get their own login? +

Yes. Each client gets a branded, self-serve portal showing only their own orders, stock on hand, invoices, and returns — which turns status-check emails into self-service.

Can I run multiple warehouses? +

Yes. StowBill is multi-warehouse and multi-client from one tenant, with stock, labour, and billing tracked per site and per client.

Bill for every box you handle.

Bring one client’s month of activity. We’ll show you, line by line, the charges StowBill would have captured.

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