The right WMS — whether you should buy one or build one.
Warehouse Management System software for US distributors, 3PLs, manufacturers, and omnichannel retailers. We have no WMS product to sell you — so we make the build-vs-buy call honestly, then either select and integrate a scalable SaaS platform or engineer a custom WMS around the way your building actually runs: inventory accuracy, directed picking, slotting, and labor planning that fits your flow, not someone else’s template.
Build-vs-Buy Decision, Made on Your Operation
We start by reasoning through the SaaS-platform-vs-custom-build decision against your real order profile, SKU and UOM complexity, automation footprint, peak curve, and 5-year cost — so you choose the path that fits your building, and you choose it before a line of production code or a license is committed.
Real-Time, Location-Level Inventory
License-plate / LPN tracking, lot, serial, expiry, and location-level inventory across receiving, put-away, transfers, and shipping — so the floor, planning, and customer service read one inventory truth instead of reconciling RF logs against the ERP after the fact.
Directed Put-Away, Picking & Slotting
Directed put-away, zone and wave picking, batch / cluster / pick-and-pass strategies, FEFO / FIFO logic, and slotting optimization — configured to your travel paths and order mix so pickers walk less and accuracy goes up.
Labor Planning & Productivity
Labor planning, task interleaving, and engineered-standard tracking — so supervisors staff to the forecasted wave, balance work across zones, and see lines-per-hour and accuracy by associate without standing over a clipboard.
Inbound, Cross-Dock, Outbound & Shipping
ASN-driven receiving, cross-dock and flow-through, packing, cartonization, parcel and LTL shipping, and yard / dock-door coordination — with the carrier and document linkage your shipping team needs captured at the right step.
ERP, OMS, TMS, Carrier & Automation Integration
A documented integration surface to your ERP, OMS, TMS, carrier, EDI, and warehouse automation (conveyor, sortation, AS/RS, AMR, pick-to-light) — so the WMS orchestrates the building while your existing systems of record stay in place and your IT team controls the connectors.
Directed Picking, In the Hands of the Floor
Directed put-away and picking on RF and mobile devices, location-level inventory, and labor tasking — so pickers work from one system of truth instead of paper pick lists and a spreadsheet shadow.
Throughput & Inventory Accuracy, Live for Operations
Lines per hour, order accuracy, dock-to-stock time, and cycle-count variance surfaced live — so supervisors and the DC manager act on the same numbers in real time, not yesterday’s report.
Buy a SaaS WMS, or build a custom one? Read it factor by factor.
Neither path is universally right — the answer is the one that fits your building, your order profile, and your 5-year cost. Because we have no WMS product to sell, we make this call on your operation.
You fit your processes to the platform’s model — strong when your flows are reasonably standard.
The system fits your zones, pick strategies, and rules exactly — strong when your operation is the advantage.
Faster to a working baseline — configuration over construction.
Longer to first value, but no gap-fit compromises to live with afterward.
Predictable subscription, plus configuration, integration, and per-user / per-volume growth.
Higher up-front engineering, no per-seat licensing — the math shifts with scale and complexity.
You move at the vendor’s roadmap and release cadence.
You change the system when the operation changes — no waiting on a roadmap.
Connectors within the platform’s supported surface and partner ecosystem.
Full control of the ERP / OMS / TMS / carrier / automation integration surface.
Tied to the platform’s data model, pricing, and lifecycle.
You own the code and the data model — and the maintenance responsibility.
Platform brings controls; your Quality / Regulatory team still owns the outcome.
Audit trail and FSMA 204 / FEFO traceability engineered in; your team still owns the outcome.
We have no WMS product to sell — so we engineer either path, and recommend the one that fits your building.
On the buy path we select, configure, extend, and integrate the platform you license directly. On the build path we engineer a custom WMS around your operation. Either way you get the engineering, the integration surface, and the documentation — and a recommendation driven by fit, cost, and risk, not a license.
Engineered with inventory-integrity, traceability, and audit-trail awareness for regulated-goods warehouses
Lot, Serial & FEFO Traceability by Design
Lot, serial, expiry, license-plate, and location lineage are engineered into the inventory model — so a recall trace, FSMA 204 inquiry, or customer-audit query in a food / pharma / device warehouse is a query against the audited record, not a spreadsheet reconstruction.
Audit-Trail & Inventory-Integrity Discipline
Every receipt, put-away, move, pick, adjustment, count, and shipment is logged with actor, timestamp, location, and quantity. Audit records are immutable at the database layer so your Quality, Regulatory, and customer-audit reviewers can read a continuous inventory history.
Identity, Access & Cloud Security Posture
Standards-based identity with enforced MFA, role-scoped access across receiving, picking, packing, shipping, quality, and admin populations, and a cloud security posture engineered with awareness of NIST CSF and SOC 2 practices. Certification and qualification remain your team’s decision.
Compliance by design
Engineering artifacts for your compliance work
For food, pharma, and medical-device warehouses, we structure the build so your Quality and Regulatory teams have the documentation, traceability, and test evidence they need for their own FSMA 204, cGMP / GDP, and audit-readiness work. We do not author SOPs or perform regulatory filings on your behalf.
Audit-trail logging as an engineering default
Every receipt, put-away, move, pick, adjustment, cycle count, and shipment is logged with actor, timestamp, location, and quantity. Audit records are immutable at the database layer so your Quality, customer auditors, and (where applicable) regulators can read a continuous inventory and chain-of-custody history.
Lot, serial & FEFO traceability as a first-class feature
Lot, serial, expiry, license-plate, and location linkage from receipt through put-away, transfer, pick, and outbound shipment are engineered into the inventory model — so recall trace, complaint follow-up, and FSMA 204 inquiries are queries against the audited record, not spreadsheet reconstructions.
Cold-chain & condition-aware storage (where applicable)
For temperature-controlled warehouses, storage-zone temperature and excursion events can be captured and time-aligned to lots and locations. Lane / zone qualification and excursion disposition remain with your Quality / GDP function — the platform provides the engineered evidence trail those decisions are made against.
Identity & role-scoped access
Standards-based identity with enforced MFA, role-scoped access for receiving, picking, packing, shipping, supervisor, quality, and admin populations, and least-privilege defaults across modules, APIs, and automation interfaces.
Cloud infrastructure for distribution operations
Hosted on cloud regions and configurations commonly used for distribution and regulated-goods workloads, with private endpoints, infrastructure defined and reviewed via Terraform, and environment promotion gates your team can sign.
Audit-ready on day one
Every component is engineered with audit-trail logging, lot / serial / FEFO traceability capture, inventory-integrity controls, role-scoped access, and lifecycle artifacts your Quality, Regulatory, and security teams can use as inputs into their own FSMA 204, cGMP / GDP, OSHA, GS1 / EPCIS, NIST CSF, or SOC 2 work. FSMA 204 traceability filings, cGMP / GDP qualification, OSHA compliance, SOC 2 attestation, and any inspection or audit outcome (FDA, OSHA, customer audit, or other authority) remain solely the customer’s responsibility, executed by the customer’s Quality, Regulatory, Safety, or Security function. Sorento Software is a software engineering and integration partner, does not resell any packaged WMS product, and does not represent, attest, or warrant compliance with any regulatory or industry framework on behalf of any customer.
Partner agreements in place
A Build-vs-Buy Call You Can Defend to the Board
Because we have no platform to sell, the SaaS-vs-custom recommendation comes with the reasoning, the cost model, and the trade-offs written down — so when you take the decision upstairs, you can show why this path fits your operation and what you’d give up on the other.
Throughput & Accuracy as Live Signals
Lines per hour, order accuracy, dock-to-stock time, and cycle-count variance surfaced where supervisors and the plant manager work — so the floor acts on the same numbers in real time instead of waiting for the morning report.
Configured or Built to Your Building — Not a Template
Your zones, your wave and pick strategies, your packing and shipping rules, your KPI set. Whether we configure a SaaS platform or engineer a custom WMS, the workflows fit the way your operators and supervisors actually work — not a generic reference template the operation has to bend around.
Built to Survive Peak — Not Stall Before It
We design against the multi-year WMS swamp: a phased, zone-by-zone or wave-by-wave rollout so a single area runs on the new system and proves out before peak, instead of a big-bang cutover that risks the whole building when volume is highest.
No Rip-and-Replace of Your Stack
The WMS is designed to coexist with the ERP, OMS, TMS, carrier, EDI, and automation connections you already run — your IT and automation teams own the connectors, so existing master data, contracts, and validated interfaces stay in place.
Our Implementation Process
Discovery, Operation Mapping & Build-vs-Buy Framing
We walk your receive, put-away, replenish, pick, pack, ship, and returns workflows; profile your order mix, SKU / UOM complexity, automation footprint, and peak curve; inventory your existing ERP, OMS, TMS, carrier, EDI, and automation connections; and reason through the build-vs-buy decision — SaaS platform vs. custom WMS — against the cost, fit, and risk for your operation, before any build or license is committed. For food, pharma, and medical-device warehouses, FSMA 204, cGMP / GDP, and any regulatory decisions stay with your Quality and Regulatory function.
Architecture / Platform-Fit & Engineering Plan
On the build path: design the WMS architecture, inventory and location data model, directed put-away / pick / slotting engine, labor model, audit-trail and access posture, and the ERP / OMS / TMS / carrier / automation integration surface. On the buy path: design the configuration, the gap-fit, the extension points, and the same integration surface around the selected SaaS platform. Either way the integration and security architecture is built alongside your IT, automation, and (where relevant) Quality stakeholders.
Build / Configure & Iterate
Iterative full-stack development of the custom WMS — receiving, put-away, inventory, picking, packing, shipping, labor, and admin tooling — or iterative configuration and extension of the selected SaaS platform, with engineering artifacts (test coverage, configuration history, change logs) captured as part of the work. Zone-by-zone demos with operators, supervisors, and planners keep the system anchored to real floor work.
Integration, Automation & UAT
Connect to your existing ERP, OMS, TMS, carrier, EDI, and warehouse automation (conveyor, sortation, AS/RS, AMR, pick-to-light) via documented APIs and standard data formats your IT and automation teams control. Run UAT with receiving, picking, packing, shipping, and supervisor stakeholders, and — for regulated-goods warehouses — assemble the engineering documentation set your Quality and Regulatory teams use as inputs into their own FSMA 204, cGMP / GDP, or audit-readiness work.
Phased Go-Live, Hypercare & Lifecycle Operations
Zone-by-zone, wave-by-wave, or DC-by-DC go-live so a single area of the building can run on the new system while the rest continues uninterrupted — and so the operation is proven out before peak. An initial hypercare period covers monitoring, defect triage, change-control reviews, and tuning so the system stays in a known state as your SKUs, order profile, automation, and SLAs evolve.
Frequently Asked Questions
Should I buy a SaaS WMS platform or build a custom one?
It depends on your operation, and that is exactly the decision we help you make first. A scalable SaaS WMS platform usually wins when your flows are reasonably standard, you want faster speed-to-value, and you can fit your processes to the platform’s model. A custom-built WMS usually wins when you have a complex or unusual supply-chain operation — unusual order profiles, deep automation, multi-tenant 3PL billing, or processes that are themselves a competitive advantage — that an off-the-shelf platform would force you to bend around. Because we sell engineering and not a packaged WMS, our recommendation is driven by fit, 5-year cost, and risk for your building — not by a license we are paid to push.
Do you resell or implement a specific WMS product?
We are a software engineering and integration partner. We do not resell any packaged WMS product, and we are not a certified implementer marketed under any platform vendor’s badge on this page. On the buy path, we help you select, configure, extend, and integrate a SaaS WMS platform you license directly. On the build path, we engineer a custom WMS around your operation. Either way, what we deliver is the engineering, the integration surface, and the documentation — not a license you buy through us.
What kinds of warehouses and operations do you build WMS solutions for?
We work with US-based distributors, third-party logistics (3PL) providers, manufacturers with distribution centers, and omnichannel retailers — including food, pharmaceutical, and medical-device warehouses where lot, FEFO, and FSMA 204 traceability matter. The common thread is custom fit: an inventory model, pick and slotting strategy, labor model, and integration surface tailored to your building and the ERP, OMS, TMS, carrier, and automation systems you already run. We are not a fit if you simply want a packaged, pre-validated, off-the-shelf WMS bought and resold through us — that is a different procurement.
How does the WMS fit alongside our existing ERP, OMS, TMS, carriers, and automation?
The WMS is designed to coexist with the ERP, OMS, TMS, carrier, EDI hubs, and warehouse automation (conveyor, sortation, AS/RS, AMR, pick-to-light) you already run — using documented APIs and standard data exchange formats. Your IT and automation teams own the actual connectors into your validated stack, so existing master data, contracts, and validated interfaces are preserved. We do not claim partnerships, certifications, or pre-built integrations with any third-party ERP, OMS, TMS, carrier, automation, or WMS vendor; we build the engineering surface your team uses to integrate.
Can we roll the WMS out one zone or DC at a time without stopping operations?
Yes — this is the default approach, not an option. Big-bang WMS cutovers that miss peak are one of the most common failure modes in distribution, and we design against them. Each zone, wave, or DC is built or configured to go live independently, with clear data and integration boundaries. This lets you prove throughput, accuracy, and labor performance on a single area, train operators and supervisors incrementally, and expand the rollout — ideally well before peak season — without risking the whole building at once.
How does the WMS handle FSMA 204, lot / FEFO traceability, and audit trail?
For food, pharmaceutical, and medical-device warehouses, lot, serial, expiry, license-plate, and location lineage are engineered into the inventory model; audit records are immutable at the database layer; and FSMA 204 traceability data points are engineered into the inbound and outbound record. The same audit trail that gives your team inventory integrity also gives Quality, Regulatory, and customer auditors a continuous history. FSMA 204 filings, cGMP / GDP qualification, OSHA compliance, and any inspection outcome remain with your Quality, Regulatory, and Safety functions; we make no regulatory certification on your behalf.
What does a typical engagement look like, and how do you scope it?
Engagement scope, timeline, and investment vary by operation and are defined during discovery — we do not quote fixed durations or fixed outcomes on a public page. Discovery is where we map your receive / put-away / pick / pack / ship / returns workflows, profile your order and SKU complexity, inventory the systems and automation you already run, and produce a written build-vs-buy recommendation with a cost model before any production-bound code or license is committed. The work is then typically phased so the highest-priority zone or DC goes live first — before peak — and your team can review the system before later phases land.
Not sure whether to build or buy your WMS?
Book a free 30-minute discovery call. We will walk through your receive, put-away, pick, pack, ship, and returns workflows, your order and SKU profile, the systems and automation you already run, and give you an honest build-vs-buy read — SaaS platform or custom WMS — with a realistic, phased scope. We have no WMS product to sell you, so the recommendation is about your operation, not our license.