OSI-licensed open source
Company management software brings the back office of a business into one system: accounting, sales, inventory, HR, CRM and documents. Open-source options such as ERP suites let growing companies adapt workflows to their own processes and avoid per-user licence costs, in exchange for running and maintaining the system.
This page focuses on whole-organisation suites and the main modules that run a company, with licences verified on each repository on 2026-11-07. Note that Odoo Community and several others have paid enterprise or hosted tiers, and that licences range from GPL to LGPL, AGPL and Apache-2.0.
Tools, licences and pricing checked against vendor and repository pages on November 7, 2026.
| Tool | Best for | Pricing | Licence |
|---|---|---|---|
| ERPNext | Small to mid-size companies wanting a full ERP | Free, open source (self-hosted); hosted plans from vendor, see vendor pricing | GPL-3.0 |
| Odoo Community | Companies wanting a modular app suite | Free Community edition (self-hosted); paid Enterprise and Odoo Online, see vendor pricing | LGPL-3.0 |
| Dolibarr | Small organisations wanting a simple PHP ERP and CRM | Free, open source (self-hosted) | GPL-3.0 |
| Apache OFBiz | Java-based teams building custom ERP | Free, open source | Apache-2.0 |
| Frappe HR | HR and payroll inside the Frappe/ERPNext family | Free, open source (self-hosted); hosted plans available, see vendor pricing | GPL-3.0 |
| OrangeHRM | Companies needing an open-source HRM core | Free open-source edition (self-hosted); paid editions available, see vendor pricing | GPL-3.0 |
| Twenty | Customer relationship management for tech-savvy teams | Free, open source (self-hosted); cloud plans available, see vendor pricing | AGPL-3.0 |
| Nextcloud | Company file sharing and collaboration on your own server | Free, open source (self-hosted); enterprise subscriptions, see vendor pricing | AGPL-3.0 |
Best for: Small to mid-size companies wanting a full ERP · Free, open source (self-hosted); hosted plans from vendor, see vendor pricing
ERPNext is an open-source ERP built on the Frappe Framework, covering accounting, inventory, manufacturing, CRM, sales, purchase, project management and HR.
Best for: Companies wanting a modular app suite · Free Community edition (self-hosted); paid Enterprise and Odoo Online, see vendor pricing
Odoo is a suite of web-based open-source business apps including CRM, website builder, eCommerce, warehouse management, project management, accounting, point of sale, HR and manufacturing.
Best for: Small organisations wanting a simple PHP ERP and CRM · Free, open source (self-hosted)
Dolibarr ERP and CRM is an open-source suite to manage contacts, quotes, invoices, orders, stocks, agenda, HR, document management and manufacturing, for small, medium or large companies, foundations and freelancers.
Best for: Java-based teams building custom ERP · Free, open source
Apache OFBiz is an enterprise resource planning system written in Java that houses a large set of libraries, entities, services and features to run all aspects of a business.
Best for: HR and payroll inside the Frappe/ERPNext family · Free, open source (self-hosted); hosted plans available, see vendor pricing
Frappe HR is open-source HR and payroll software with over 13 modules, from employee management, onboarding and leave to payroll, taxation, expense claims and performance management.
Best for: Companies needing an open-source HRM core · Free open-source edition (self-hosted); paid editions available, see vendor pricing
OrangeHRM is a comprehensive human resource management system that captures the essential functionality for any enterprise. An open-source edition is published on GitHub.
Best for: Customer relationship management for tech-savvy teams · Free, open source (self-hosted); cloud plans available, see vendor pricing
Twenty is an open-source CRM for technical teams, giving building blocks for a custom CRM that is built, shipped and versioned like the rest of your stack.
Best for: Company file sharing and collaboration on your own server · Free, open source (self-hosted); enterprise subscriptions, see vendor pricing
Nextcloud Server is a self-hosted platform for files, contacts, calendars and collaboration, letting you store, sync and share data on a server of your choosing.
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| If you need… | Start with |
|---|---|
| Full ERP in one system | ERPNext, Odoo Community |
| Simple ERP and CRM on PHP hosting | Dolibarr |
| Custom Java ERP | Apache OFBiz |
| HR and payroll | Frappe HR, OrangeHRM |
| CRM and file sharing | Twenty, Nextcloud |
Quick answers to common questions
Software that runs core business operations such as accounting, sales, inventory, HR and documents in a single system.
Odoo Community is open source under LGPL-3.0. Odoo Enterprise adds proprietary features and is a paid product.
ERPNext is fully open source with GPL-3.0, while Odoo has a larger app marketplace but keeps some apps in a paid edition.
Yes. Many companies pair an ERP with a separate HR or CRM tool such as Frappe HR or Twenty, using APIs to integrate them.
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