Open Source Inventory Management Software
Inventory software lives or dies by how it handles the gap between what the system thinks is on the shelf and what is actually there - reservations, in-transit stock, returns, and shrinkage all conspire to break that number. The open source options here let you see exactly how stock levels, reorder points, and multi-warehouse moves are calculated, and run them against your own database so a cycle count never has to be reconciled against a vendor's hidden math.
ERPNext
Open source ERP for accounting, inventory, orders, manufacturing, assets, projects, and daily operations
Grocy
Self-hosted groceries and household management for stock, shopping lists, meals, and chores
InvenTree
Open source inventory management with low-level stock control, part tracking, and a REST API
HomeBox
Home inventory system for tracking items, documents, warranties, and maintenance
metasfresh
Free and open source ERP for industry and trade, with sales orders, invoicing, and a REST API
Part-DB
Open source inventory management for electronic components, accessed in any browser on a web server
ModernWMS
Open source warehouse management system for small and medium businesses, built with .NET 7 and Vue 3
Axelor Open Suite
Full-web ERP suite with modular apps for CRM, finance, HR, projects, inventory, and production
ADempiere
Community-driven business suite covering ERP, CRM, manufacturing, supply chain, and POS