Inventory Management for Ecommerce
Multi-channel inventory planning for scaling ecommerce brands. Connect Shopify, Amazon, and wholesale into one source of truth, with forecasting, replenishment, and exception reporting, without the Frankenstein spreadsheet.
Built for ops teams managing 100–10,000 SKUs across multiple channels and regions, who’ve outgrown spreadsheets but don’t want heavyweight enterprise software.
Guided onboarding in weeks · No long-term contract · Trusted by Craftis, HoX, Trtl, Evolve, GTE
Why ecommerce inventory is harder than the apps make it look
Generic inventory apps were built for one channel, one warehouse, and a stable demand pattern. Ecommerce has none of those.
Five systems, one weekly forecast
Shopify for DTC. Amazon Seller Central for marketplace. An IMS like Unleashed or Cin7 for fulfilment. Xero for accounting. A 3PL export. Putting them together is the whole job.
Promotions that distort the forecast
A 30% sale lifts demand several times over for a week, then drops it below normal for the next two. A trailing-average forecast can’t see the difference; the next reorder over-buys.
Long lead times, fast demand
14-week ocean freight against a 2-week TikTok-driven demand spike. Either you carry expensive buffer or you stock out at exactly the wrong moment.
Bundles, kits, and variants
A bundle on Shopify is three SKUs in the warehouse. A fulfilment app that doesn’t handle this forces workarounds that break at scale.
Multi-region, multi-warehouse
UK 3PL plus a US 3PL plus FBA Europe plus FBA US. Total stock is fine; the warehouse facing the demand is empty. Allocation is its own problem.
The single mistake that costs a quarter
One wrong forecast on a hero SKU is the difference between a strong year and a painful one. Spreadsheets don’t flag it until you’re already past it.
What ecommerce inventory management should do
Lumina is built around the work ops teams at scaling ecommerce brands do every week, not around the demos a software vendor wants to give.
One source of truth across every channel
Connect Shopify, Amazon, wholesale, IMS, and 3PL data into a single view. No more copy-pasting between five systems to get a weekly forecast.
Forecasting built around your range, per SKU, per channel
A bottom-up forecast built to match how your products behave: how your range is split and profiled, how each line sells through its season, what moves and what doesn't. The models are configured to your intuition about the range, not the other way round, and every number is visible and adjustable.
Automated replenishment recommendations
Reorder triggers that account for supplier MOQs, lead times, case-pack constraints, and your real demand variability, not generic min/max rules that over-stock slow movers and under-protect bestsellers.
Exception reporting that flags risk
Stockout warnings before they happen. Overstock alerts on slow-movers. Late-PO detection. The signal you need surfaced automatically, not buried in a 200-row spreadsheet.
Bundles, kits, and custom SKU support
Real-world product complexity handled natively. Sell a bundle on Shopify, kit it in the warehouse, account for the components separately, without working around the tool.
Built like a spreadsheet, works like a system
Demand planners and supply chain managers see what's happening at SKU level, in a view they can shape themselves, without filing a ticket with engineering.
Connects to the systems you already run
Lumina pulls sales, stock, and supplier data directly from your existing stack. No re-platforming, no parallel data entry.
Don’t see your tool? We build custom connectors to it during onboarding. See all integrations
What scaling ecommerce brands say about Lumina
“I’d estimate Lumina saves 4–5 hours per week vs our old system.”
Neil Marchant, Supply Chain Advisor to Craftis
Craftis: 50% reduction in planning time
How a leading kids’ activity-pack brand replaced spreadsheets with forecasting and inventory planning built around their range.
HoX: seasonal planning at scale
Planning seasonal inventory across channels with confidence, replacing spreadsheets with automated, data-driven decisions.
Trtl: demand forecasting that follows the season
How Trtl uses Lumina’s demand forecasting to align inventory with seasonal demand and remove manual planning friction.
The full ecommerce inventory workflow, in one platform
Each capability stands on its own; together they replace the spreadsheet-and-six-tabs setup most scaling ecommerce brands run on today.
Demand planning
Bottom-up forecasting per SKU, per channel, configured to how your range is split and profiled, with accuracy and bias tracked per SKU.
See demand planningReplenishment & ordering
Reorder triggers that respect MOQs, lead times, and case-pack constraints, with POs built for you and ready to send.
See replenishmentInventory health
Days of cover, turnover, and GMROI per SKU and per channel, surfacing slow-movers before they become write-downs.
See inventory managementCost & cashflow
See true landed cost and margin per SKU, stay on top of supplier payments, and keep cashflow healthy as you buy.
See cost & cashflowWant to size the basics yourself?
Try the safety stock calculator to compute safety stock and reorder point per SKU. Or grab the free purchase order template for the supplier-ordering side. Both are free; the template just needs an email.
From signup to live in weeks
Lumina is deliberately not a self-service setup you figure out alone, and not a three-month implementation either. Onboarding is guided by the Lumina team, with your data, your SKU structure, and your channels, over a few weeks.
- 1
Weeks 1–2: Connections and data
Connect Shopify, Amazon, your IMS, and your accounting system, and import anything that lives in spreadsheets. We map your real-world product complexity with you: bundles, kits, parent/variant SKUs, supplier and lead-time data.
- 2
Weeks 2–3: Forecast and replenishment, configured to you
We set up your forecasting and replenishment around how your range is split and profiled, your MOQs and lead times, and how you want to order. Reviewed together, so the forecast matches your intuition before you rely on it.
- 3
Week 4: First live run
Stockout and overstock alerts wired up, the first planning meeting run from Lumina, and the first PO raised together. Then we stay alongside you as you grow.
Why scaling ecommerce brands choose Lumina
The space between “a Shopify inventory app” and “heavyweight enterprise software” is where most growing brands live. Lumina is built for that space.
Shopify-only inventory apps
- • Track what’s on hand and what sold
- • No demand forecasting
- • Single channel only
- • Break on bundles and kits
Lumina
Built for this gap- Forecasting built around your range, per SKU per channel
- Multi-channel and multi-warehouse out of the box
- Bundles, kits, custom SKUs handled natively
- Guided onboarding in weeks, no engineering required
Heavyweight enterprise software
- • Months-long implementation
- • Rigid workflows
- • Heavy IT and admin burden
- • Designed for enterprise, priced like enterprise
Comparing alternatives in detail? See our NetStock alternatives guide and Lumina vs NetStock comparison.
Frequently asked questions
What is inventory management for ecommerce?+
Inventory management for ecommerce is the system of forecasting demand, holding the right level of stock, and triggering replenishment for products sold across online channels, typically Shopify, Amazon, Etsy, and wholesale marketplaces. It needs to handle multi-channel demand, fast-moving SKUs, and the constant copy-paste of data between platforms that ecommerce ops teams know too well.
How is ecommerce inventory management different from retail or B2B?+
Ecommerce typically has higher SKU velocity, more channels, smaller order sizes, and faster customer expectations. The data is also more fragmented: each marketplace has its own report, each 3PL has its own export, and reconciling them is the daily pain. Retail and B2B usually have fewer, larger orders and tighter integration with one or two ERP systems.
Does Lumina integrate with Shopify and Amazon?+
Yes. Lumina connects directly to Shopify, Amazon Seller and Vendor Central, and TikTok Shop, plus 3PLs like Mintsoft and ShipBob, accounting tools like Xero and QuickBooks, and ERPs like Brightpearl and Microsoft Dynamics. For anything else, we build a custom connector. It pulls sales, stock, and order data into one view, configured to your business, replacing the weekly copy-paste cycle.
How long does it take to onboard?+
A few weeks. Onboarding is guided: we connect your sales channels, IMS, and accounting system, map your SKU structure (including bundles and kits), build your first forecast from your historical demand, and run your first PO with you. The team handles the data migration so you don't have to, and it's a one-off setup fee rather than an open-ended services engagement.
What's the difference between Lumina and a generic inventory app?+
Generic apps focus on transactional inventory tracking: what's on hand, what's been sold. (Shopify's own Stocky was discontinued in August 2026, which has left a lot of brands looking.) Lumina is the planning layer those apps never had: forecasting built around your range, replenishment recommendations that respect MOQs and lead times, landed costs and cashflow, and exception reporting for stockout and overstock risk. A tracking app tells you the past; Lumina tells you what to do next.
What size of ecommerce business is Lumina built for?+
Scaling brands, typically £1–30M in annual revenue and growing year on year. Below that, spreadsheets often still work. Lumina is built for the point where complexity has outrun the spreadsheet but heavyweight enterprise software would be overkill, and it grows with you from there.
Can it handle bundles, kits, and custom SKUs?+
Yes, and this is where most generic ecommerce inventory tools fall down. Lumina handles bundles (selling multiple SKUs together), kits (assembling units in your warehouse), and custom SKU structures including parent/variant hierarchies. The platform was deliberately built around real-world product complexity rather than forcing you into a rigid catalogue model.
How does Lumina forecast ecommerce demand specifically?+
Per SKU, per channel, per region, bottom-up from your sales history, with the models configured to how your range is split and profiled and how your products behave through the season. The aim is a forecast that matches your own intuition about the range, with every number visible and adjustable. Forecast accuracy and bias are tracked per SKU so the weak spots get attention before they cause stockouts or overstock.