InventoryOS — Multi-tenant Inventory SaaS

• Give growing businesses one place for inventory, purchasing, sales, POS and payments instead of spreadsheets and disconnected tools.
• Serve many companies from one deployment, with each tenant's data strictly isolated and access controlled by roles and permissions.
• Sell it as a subscription, with plan limits on users, products, warehouses and orders enforced by the platform itself.
• Go beyond record-keeping with built-in intelligence: reorder suggestions, dead-stock detection and a plain-language assistant.

InventoryOS is a multi-tenant SaaS built on Node.js, Express, PostgreSQL (Prisma) and Redis. Every record carries a tenant ID, and middleware injects and enforces the tenant on each request, so one company can never reach another's data. A React app covers daily operations — products, batches, warehouses, suppliers, purchase and sales orders, POS with barcode/QR labels, returns and customer payments — and a separate super-admin console manages tenants, plans, feature flags and announcements. A smart-reorder engine computes safety stock and reorder points from sales history, a dead-stock engine flags non-moving items by age and value, and an assistant answers questions like "show dead stock" or "profit this month" straight from live data.