Best Free & Open Source Inventory Management Software (2026)

In the fast-paced world of retail, manufacturing, and e-commerce, staying on top of your stock isn’t just a “good practice”—it is the backbone of your profitability. However, for many small businesses and startups, the high cost of proprietary Enterprise Resource Planning (ERP) systems can be a massive barrier to entry.

This is where open-source inventory management software steps in. By leveraging open-source solutions, businesses gain access to professional-grade tools without the restrictive licensing fees. Moreover, the “open” nature of these tools allows for deep customization, ensuring the software fits your unique business workflow rather than forcing you to change your operations to fit the software.

In this guide, we dive deep into the top 10 best free and open-source inventory management software for 2026, helping you choose the right tool to scale your operations.

Managing stock is the heartbeat of retail, manufacturing, and distribution. A robust, free open-source inventory management system allows businesses to streamline operations, reduce labor costs, and ensure real-time stock visibility across multiple channels. By 2026, the shift toward open-source is driven by a need for agility: businesses must be able to integrate with new e-commerce platforms or custom hardware (like IoT sensors) without waiting for a proprietary vendor to release an update.

What is Open Source Inventory Management Software?

At its core, open source inventory management software is a platform where the source code is publicly accessible for anyone to view, modify, and distribute.

Key Characteristics:

• No Licensing Fees: Most are free to download and run, significantly lowering the total cost of ownership (TCO).
• Customizability: Users can tailor the software to their exact workflows—whether that’s adding custom fields to track sustainability certifications or building unique replenishment algorithms.
• Data Sovereignty: You decide where your data lives, whether on your local servers or a private cloud, ensuring you comply with regulations like GDPR on your own terms.
• Community Support: Popular projects are backed by thousands of developers who contribute bug fixes, security patches, and new features daily.

Why Choose Open-Source Software for Inventory Management?

Before we jump into the list, it is important to understand why the shift toward open-source is accelerating:

1. Cost Efficiency: Most open-source tools are free to download and use, significantly reducing the “Total Cost of Ownership” (TCO).
2. Customization: You have access to the source code. If you need a specific feature—like a custom barcode format or a unique reporting metric—you can build it.
3. No Vendor Lock-in: You own your data and your system. You aren’t at the mercy of a software provider raising prices or discontinuing a product.
4. Community Support: Popular open-source projects have thousands of developers contributing to security patches and new features daily.

For more insights on how these systems compare to traditional tools, check out this guide on Inventory Management Software Selection.

Top Free and Open Source Inventory Management Software (2026)

Looking for free inventory management software to track stock, manage a warehouse, or keep your business assets organized? There are several open source inventory management systems that can help you do this without paying expensive software licensing fees.

The right choice depends on what you need to manage. A small business selling products online may need stock tracking, purchase orders, and sales integrations. A manufacturer might need parts management and bill of materials (BOM) tracking, while an IT department may need to monitor laptops, software licenses, and network devices.

In this guide, we’ll compare eight free and open source inventory management software options: ERPNext, Odoo Inventory, Snipe-IT, InvenTree, Dolibarr, OpenBoxes, GLPI, and OCS Inventory NG. We’ll cover their key features, best use cases, and limitations to help you find the right solution for your business.

One thing to keep in mind: free and open source doesn’t always mean zero operating costs. If you host the software yourself, you may still need to pay for a server, setup, maintenance, and technical support.

1. ERPNext – Best Free Open Source Inventory Management Software for Small Businesses

ERPNext is a free and open source ERP system with built-in inventory management, accounting, purchasing, sales, and manufacturing features. It’s a practical option for businesses that want to manage their stock and other daily operations from a single platform instead of switching between several different tools.

With ERPNext, you can track stock across multiple warehouses, record stock movements, manage serial and batch numbers, and monitor inventory valuation. The software also connects inventory with purchasing, sales orders, and manufacturing workflows, helping businesses keep stock information consistent across departments.

For example, if you run a manufacturing business, ERPNext can help you track raw materials, manage production requirements, and monitor finished goods. Retailers and distributors can use it to maintain stock records and coordinate purchasing with sales.

Key Features:

• Real-time inventory tracking across multiple warehouses

• Stock transfers, stock reconciliation, and inventory valuation

• Serial number and batch tracking

• Purchase orders and supplier management

• Automated reorder levels and material requests

• Manufacturing inventory and bill of materials management

• Integration with accounting, sales, CRM, and procurement

• Custom reports and API integrations

Website: erpnext.com

Source Code: GitHub – ERPNext

Best For: Small and medium-sized businesses, manufacturers, retailers, distributors, and ecommerce companies that need inventory management alongside accounting and other ERP features.

Why Choose ERPNext: If you’re searching for free inventory management software for a small business, ERPNext is worth considering because it brings several business functions together. You don’t need a separate inventory application just to coordinate stock with purchasing and accounting. However, the system has more features than some small businesses need, so allow time for configuration and staff training.

2. Odoo Inventory – Best Open Source Inventory Software for Warehouse Management

Odoo Inventory is the inventory and warehouse management application within the Odoo business software ecosystem. It helps businesses manage incoming goods, outgoing shipments, internal stock movements, and warehouse operations.

Odoo is particularly useful for businesses that expect their inventory requirements to grow. Depending on the edition and modules selected, you can connect inventory operations with sales, purchasing, point of sale, and manufacturing.

Its warehouse workflows can support multi-step receiving and delivery processes, while barcode functionality helps reduce manual data entry during stock movements. Before choosing the free Community edition, check which features and integrations are included in that edition, as some capabilities may require additional modules or a paid plan.

Key Features:

• Inventory tracking across warehouses and storage locations

• Incoming shipment and outgoing delivery management

• Barcode-based stock operations

• Lot and serial number tracking

• Reordering rules and replenishment workflows

• Stock movement and inventory reporting

• Integration with sales, purchasing, and manufacturing

• Modular architecture for expanding business operations

Website: odoo.com/app/inventory

Source Code: GitHub – Odoo

Best For: Retailers, distributors, ecommerce businesses, and growing companies looking for warehouse inventory management software that can connect with wider business operations.

Why Choose Odoo Inventory: Odoo is a good option if your business needs more than basic stock tracking. It offers a connected approach to managing inventory, orders, and warehouse workflows. Before implementation, compare the Community edition with the paid offering to make sure the features you need are available within your budget.

3. Snipe-IT – Best Free Open Source IT Asset Management Software

Snipe-IT is a free and open source IT asset management system built on Laravel. Unlike traditional inventory software designed to track products for sale, Snipe-IT focuses on the physical and digital assets an organization owns, assigns, and maintains.

For example, an IT team can use Snipe-IT to track laptops assigned to employees, record purchase information, manage accessories, and monitor software licenses. Its check-in and check-out workflows help organizations understand who has each asset and where it is located.

This makes Snipe-IT particularly useful for companies that need an organized IT asset inventory without purchasing an expensive enterprise asset management platform.

Key Features:

• Computer, laptop, and hardware asset tracking

• Asset assignment by employee, department, and location

• Check-in and check-out management

• Barcode and QR code support

• Software license and accessory tracking

• Asset history and audit trails

• REST API for connecting with other systems

• Self-hosted deployment options

Website: snipeitapp.com

Source Code: GitHub – Snipe-IT

Best For: IT departments, schools, universities, businesses, and organizations that need free IT asset tracking software for computers, peripherals, licenses, and equipment.

Why Choose Snipe-IT: If your main problem is knowing which employee has a laptop, when equipment was purchased, or when a license expires, Snipe-IT is a strong option. Its asset-focused features are more relevant to IT inventory management than general warehouse stock control. If you need purchasing, sales, and product inventory management, consider a traditional inventory or ERP system instead.

4. InvenTree – Best Open Source Inventory Management Software for Parts and Components

InvenTree is an open source inventory management system designed for parts management and stock control. It is particularly useful for engineering teams, electronics manufacturers, repair workshops, and small manufacturing businesses that need to keep track of individual components.

InvenTree allows users to organize parts into categories, maintain supplier information, record stock levels, and manage bills of materials. Its manufacturing-related workflows help teams understand which components are required for an assembly and whether those parts are available.

The system also provides an API and a plugin ecosystem, which can be useful if you want to connect inventory records with other applications or engineering tools.

Key Features:

• Parts and component inventory tracking

• Stock management across storage locations

• Supplier and manufacturer records

• Bill of materials (BOM) management

• Assembly and build-order tracking

• Stock history and inventory reporting

• REST API and plugin support

• Self-hosted deployment options

Website: inventree.org

Source Code: GitHub – InvenTree

License: MIT

Best For: Electronics manufacturers, engineering workshops, hardware startups, repair businesses, and small manufacturers that need detailed parts and component inventory tracking.

Why Choose InvenTree: InvenTree makes sense when you need to manage individual components rather than just count finished products. Its parts hierarchy and BOM functionality help teams understand how components relate to assemblies. If your business also needs full accounting, payroll, or customer relationship management, you may need to integrate it with other software.

5. Dolibarr – Best Free Inventory Management and ERP Software for Small Businesses

Dolibarr is an open source ERP and CRM platform that includes stock management, product and service records, supplier management, and order-related features. It is designed to let businesses activate the modules they need instead of forcing them to use a large collection of features from day one.

For a small business, this modular approach can be useful. You can manage products, track stock movements, coordinate purchasing, and connect inventory with sales operations. As your business grows, you can explore additional modules for accounting, customer management, and other processes.

Dolibarr is also worth considering for businesses that want a PHP-based application they can host on their own infrastructure.

Key Features:

• Product and service catalog management

• Stock tracking and warehouse management

• Supplier and purchase order management

• Sales orders and stock movement records

• Inventory adjustments and stock reporting

• Integration with other ERP and CRM modules

• Additional modules and extensions

• Self-hosting and customization options

Website: dolibarr.org

Source Code: GitHub – Dolibarr

Best For: Small businesses, freelancers, service providers, distributors, and organizations that want free inventory software with basic ERP and CRM functionality.

Why Choose Dolibarr: Dolibarr is worth a look if you want inventory tracking and business management in one application without the complexity of a large enterprise system. Its modular structure helps keep the setup focused on your needs. However, check the available modules carefully if you require advanced warehouse automation or specialized inventory workflows.

6. OpenBoxes – Best Open Source Inventory Management Software for Healthcare and Warehouses

OpenBoxes is an open source inventory and warehouse management system developed with supply chain operations in mind. It has particular relevance to healthcare organizations, pharmacies, humanitarian projects, and distributors that need to track stock across multiple facilities.

OpenBoxes supports inventory tracking by location, lot, and expiration date. These capabilities are important when organizations handle medical supplies, pharmaceuticals, or other products that must be monitored carefully throughout storage and distribution.

The system also includes workflows for procurement, stock transfers, receiving, picking, and replenishment. Organizations can use these tools to improve visibility into available stock and reduce the risk of expired products or unnecessary stock shortages.

Key Features:

• Inventory tracking across multiple facilities

• Lot, batch, and expiration date management

• Warehouse locations and bin-level stock control

• Stock transfers and replenishment workflows

• Purchase orders and supplier management

• Receiving, picking, and stock movement records

• Barcode scanning and inventory counting

• Self-hosted deployment options

Website: openboxes.org

Source Code: GitHub – OpenBoxes

Best For: Hospitals, pharmacies, NGOs, humanitarian organizations, medical supply distributors, and businesses with complex warehouse or multi-location inventory requirements.

Why Choose OpenBoxes: OpenBoxes is particularly useful when traceability matters as much as stock quantity. For example, a healthcare warehouse may need to know which facility holds a particular batch and whether any units are nearing expiration. If you need general retail inventory management, compare its workflows with ERPNext or Odoo before deciding which system is the better fit.

7. GLPI – Best Open Source IT Inventory and Asset Management Software

GLPI is an open source IT asset and service management platform. It helps organizations maintain an inventory of computers, monitors, printers, network equipment, software, and other IT resources.

GLPI is more than an asset register. It combines asset management with service desk capabilities, allowing IT teams to connect equipment records with support requests, maintenance activities, and IT service processes. Its inventory functionality can also work with the GLPI Agent to collect information about devices in an organization’s infrastructure.

For companies managing dozens or hundreds of IT devices, this can make it easier to understand what equipment is in use and which systems require attention.

Key Features:

• Computer and hardware inventory management

• Software and license tracking

• Network device and peripheral inventory

• Asset records and location management

• Automated inventory collection through compatible agents

• IT service desk and ticket management

• Configuration management database (CMDB) capabilities

• Plugins and integration options

Website: glpi-project.org

Source Code: GitHub – GLPI

Best For: IT departments, managed service providers, schools, universities, and organizations that need open source IT asset management software combined with help desk and service management features.

Why Choose GLPI: If your team manages hardware, software, support tickets, and IT infrastructure, GLPI can bring those activities together in one system. It is a stronger fit for IT asset inventory than for managing retail products or raw materials in a warehouse. Review its agent and plugin requirements before planning your deployment.

8. OCS Inventory NG – Best Free Open Source Hardware and Software Inventory Tool

OCS Inventory NG is an open source IT inventory and asset discovery solution that helps administrators collect information about computers and other devices across an IT environment.

Rather than relying entirely on employees to update asset records manually, OCS Inventory NG can collect hardware and software information from supported devices. IT administrators can use the collected data to understand their device fleet, review installed software, and support inventory and maintenance processes.

The project also offers remote deployment capabilities and integrations with other IT management tools. This makes it especially relevant for organizations that need to maintain visibility across a large number of computers and endpoints.

Key Features:

• Hardware inventory and device discovery

• Software inventory and installed application information

• Centralized asset inventory reporting

• Remote software and package deployment capabilities

• Device grouping and inventory organization

• Integration with other IT management platforms

• Support for managed IT environments

• Open source deployment options

Website: ocsinventory-ng.com

Source Code: GitHub – OCS Inventory NG

Best For: IT administrators, schools, enterprises, managed service providers, and organizations that need automated hardware and software inventory across multiple computers.

Why Choose OCS Inventory NG: OCS Inventory NG is useful when manually tracking every computer and its installed software would take too much time. Automated inventory collection can help IT teams maintain more consistent records and identify changes across their device fleet. If you also need an IT service desk, GLPI can be worth evaluating alongside OCS Inventory NG.

Comparison of the Best Free and Open Source Inventory Management Software

Choosing inventory software becomes easier when you compare the tools by their main purpose instead of looking only at the number of features.

Note: Open source licensing, available modules, hosting options, and commercial services differ by product. Verify the current edition and license terms on the official website before implementation.

How to Choose the Best Free Inventory Management Software

Before downloading an inventory management system, consider what you need it to do every day.

• For small business inventory management: Start by comparing ERPNext and Dolibarr. Both offer inventory functionality alongside wider business management tools.

• For warehouse inventory management: Evaluate Odoo Inventory and OpenBoxes based on your receiving, picking, replenishment, and multi-location requirements.

• For manufacturing inventory and parts tracking: InvenTree is worth considering for components, assemblies, and bills of materials. ERPNext may be a better fit if you also need broader manufacturing and accounting features.

• For IT asset inventory management: Choose Snipe-IT if you mainly need to assign and track equipment. GLPI is worth considering if you also need service desk and IT management features.

• For automatic computer inventory: OCS Inventory NG is relevant when you need to discover and collect hardware and software information across managed devices.

You should also check how easy the software is to install, whether it supports your existing systems, how backups work, and how much technical knowledge is needed to maintain it.

Advanced Inventory Techniques to Use with These Tools

To get the most out of your inventory tracking features list, you should implement modern control techniques:

ABC Analysis

Divide your stock into three categories:

• A-Items: High-value items that make up 70-80% of your value but only 10-20% of your quantity. Count these quarterly.
• B-Items: Medium value, medium frequency. Count biannually.
• C-Items: Low value, high quantity (e.g., screws). Count annually.

Just-In-Time (JIT) Management

By leveraging real-time data from tools like ERPNext or Odoo, you can move toward JIT management—ordering inventory only as it is needed to reduce holding costs and minimize “dead stock”.

Cycle Counting

Instead of closing your warehouse once a year for a massive “Physical Audit,” use cycle counting. This involves counting small portions of your inventory daily or weekly, ensuring accuracy without disrupting operations.

Reorder Point (ROP) Formula

Most open-source tools allow you to set automated reorder points. Use the following formula to calculate them:

$$ROP = (Average Daily Usage \times Lead Time in Days) + Safety Stock$$

Example: A business sells 50 units per day, with a supplier lead time of 7 days and a safety stock of 100 units. ROP = (50 × 7) + 100 = 450 units. When stock hits 450 units, a new purchase order is triggered automatically.

Security and Data Privacy in 2026

With increasing cyber threats, the open source inventory software benefits for security are paramount:

• Transparency: Because the code is public, bugs and vulnerabilities are often caught and fixed by the community faster than in proprietary systems.
• Ownership: You aren’t storing your sensitive supplier data or customer lists on a third-party server where you have no control over the encryption keys.
• Compliance: You can modify the system to ensure it meets specific local regulations, such as HIPAA for medical inventory.

Summary Checklist for Implementation

• Audit current SKUs and clean up data.
• Define warehouse locations and hierarchy.
• Select a picking strategy (FIFO, LIFO, or FEFO).
• Purchase hardware (Barcode/RFID scanners).
• Train staff on the new inventory tracking features list.

Frequently Asked Questions

What is the best free open source inventory management software?

The best option depends on your requirements. ERPNext is worth considering for businesses that need inventory and ERP features, InvenTree is designed for parts and components, and OpenBoxes focuses on complex warehouse and supply chain operations. For IT assets, Snipe-IT and GLPI are more relevant choices.

Is open source inventory management software really free?

Many open source inventory systems can be downloaded and used without paying a software license fee. However, you may still need to pay for hosting, installation, customization, maintenance, backups, and technical support.

Which free inventory software is best for small businesses?

ERPNext and Dolibarr are two options to compare. ERPNext offers broader business management capabilities, while Dolibarr has a modular approach that can suit businesses looking for a more focused setup.

What is the difference between inventory management and IT asset management?

Inventory management typically focuses on stock levels, purchasing, sales, warehouses, and product movements. IT asset management focuses on computers, devices, software licenses, equipment assignments, and asset lifecycles. Some features overlap, but the two types of software serve different operational needs.

Can I self-host open source inventory management software?

Yes. The software listed in this guide offers open source deployment options, although the technical requirements vary. Before installing a system, review its official documentation for supported operating systems, databases, server requirements, security updates, and backup procedures.

Final Thoughts

The best free and open source inventory management software is the one that fits your actual workflow. A small retailer doesn’t necessarily need an enterprise ERP, and an IT administrator doesn’t need a warehouse system just to track laptops and software licenses.

For general business operations, start with ERPNext, Odoo Inventory, or Dolibarr. For parts and manufacturing, take a closer look at InvenTree. If your work involves healthcare supplies and complex warehouse operations, OpenBoxes may be the right fit. For IT asset tracking and device discovery, compare Snipe-IT, GLPI, and OCS Inventory NG.

Take time to test the available demos, review the documentation, and check the total cost of hosting and maintenance before making a final decision. The right system should make inventory easier to manage, not add another layer of work to your daily operations.

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