Every order, every client, one list
Pending, sent, change requests and cancellations across all clients, filterable by client, date, status or SKU, with saved views for the lists you check daily.
Client portal and ordering →For independent fulfillment operators
Run your whole 3PL from one system.
Lithos 3PL™ gives a fulfillment operator a client portal, a warehouse queue, inventory with lots and expiry, UPS label buying and invoicing in one platform. Your own instance, your own data, built inside a working warehouse.
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See the features
A short call on sample data. No obligation.
Every screenshot on this site is the Lithos demo environment with sample data. No customer data is shown.
The tools don't talk to each other, so people do the talking.
Most independent 3PLs run on a shared inbox, a spreadsheet, a shipping tool and an accounting package that have never met. Every hand-off between them is a phone call, a retype or a mistake.
Intake
Orders arrive by email
Someone retypes them. The error shows up at the packing bench, or at the customer's door.
Stock
Inventory lives in a spreadsheet
"How many do I have?" is a phone call and a walk to the shelf. Lots and expiry dates are a separate tab, if they exist at all.
Shipping
Tracking is pasted by hand
The label tool doesn't know the client. Tracking numbers travel back by email, and the label bill gets rebuilt later.
Month-end
Billing is a reconstruction
What shipped, what was stored and what was rebilled, for every client, pieced together from four places.
One system, three seats.
The operator, the warehouse and each of your clients work from the same orders and the same inventory. Nothing is copied between tools, because there is only one.
Operator
Every client on one screen
All orders, invoices, restocks, holds and inventory across every client, with an audit trail of who changed what and an email log of everything sent.
Warehouse
Pick, pack, ship from one queue
Orders reach the floor the moment they're placed. Scan to verify picks, buy the UPS label, and the tracking goes back to the client without anyone typing it.
Client
A portal they'll actually use
Their own login: live stock, a new-order form with only their catalog, order history with tracking, invoices, credit balance and downloadable reports.
What it looks like.
Four screens from the demo environment. The features page goes through all of it.
The pick list the floor works from
What needs picking, how old it is, which client it's for. Ship with UPS or mark it sent from the same row. Lot numbers follow the product onto the packing slip.
Pick lists and packing slips →
Clients fix their own orders
Until a label is bought, a client can edit quantities or the ship-to on a pending order themselves. After that, they send a change request and your staff see it in the queue.
Order changes →
Invoices that match what you shipped
Invoices per client, aging into paid, unpaid and overdue, with credit balances and payment history your clients can see for themselves.
Billing and invoices →
Built for the work a 3PL actually does.
Every feature exists because a working warehouse needed it. Lots, expiry dates and certificates of analysis make Lithos a fit for regulated and perishable goods; they switch off for clients who don't need them.
Client portal and ordering
Live stock, orders, restocks, invoices, reports and team logins per client.
Details →Inventory with lots, expiry and COAs
Per-client stock with a ledger, lots from receiving, best-by dates and certificates.
Details →Shortfalls and backorders
Short orders are raised, not silently shorted: fill, split, substitute or backorder.
Details →Receiving and putaway tasks
Pending receipts, lots on fulfil, and a shelving task with checkpoints for the floor.
Details →UPS shipping and tracking
Negotiated rates, your account or the client's, third-party billing, tracking written back.
Details →Monthly 3PL billing
Storage, handling and rebilled labels on invoices your clients see in their portal.
Details →Audit trail
Who did what, when, from where, plus a log of every email sent.
Details →Staff mobile app
The same actions as the web app on an iPhone, for staff and clients.
Details →Integration API and webhooks
Scoped API keys per client, signed webhooks with retries, CSV import and export.
Details →Founding Operator seats
Lithos was built inside one working 3PL and is now opening to a small number of independent operators. Founding Operators get their own instance, onboarding done with them, a direct line to the people who build it, and a say in what gets built next.
Who it fits
Independent 3PLs with one warehouse
- Direct-to-consumer and small B2B volume for a list of merchant clients
- Shipping with UPS
- Running on spreadsheets, email intake or a dated portal today
- Goods with lots, expiry dates or certificates are a strength, not a requirement
What you get
Your own Lithos instance
- A dedicated instance with its own database, on infrastructure we own
- Your clients, SKUs and UPS account set up with you, not after you
- A direct line to the builders; what you ask for shapes the roadmap
- Pricing set per engagement
Questions operators ask first
Is this multi-tenant software?
No. Each operator runs on a dedicated instance with its own database. Your clients' data never shares a table with another 3PL's.
Which carriers?
UPS, connected directly: rates, labels, voids and tracking from inside the pick list, on your UPS account or your client's. UPS is the only carrier today.
Does it connect to Shopify or other stores?
Store connectors for Shopify, WooCommerce and BigCommerce are coming. Today, orders arrive through the client portal, by CSV, or through the Lithos API.
See your operation on one screen.
A short call. We look at how orders come in today and show you Lithos on sample data. No obligation.
Book a walkthrough