OSI-licensed only · self-hostable
Odoo is a modular business suite covering CRM, accounting, inventory, manufacturing and more. The Community edition is open source under the LGPL-3.0; the separate Enterprise edition adds proprietary modules. People look elsewhere for a different feature set, community, or licence.
Every project below is under an OSI-approved licence (GPL-3.0, GPL-2.0, AGPL-3.0, Apache-2.0), checked against its repository. Two accounting and invoicing apps that are often called open source, Akaunting and Invoice Ninja, are listed at the end because their licences are not OSI-approved.
Licences checked against each repository on November 7, 2026.
| Tool | Best for | Licence | Runs as |
|---|---|---|---|
| ERPNext | Full ERP closest to Odoo | GPL-3.0 | Docker |
| Dolibarr | Modular ERP and CRM for small businesses | GPL-3.0 | Server |
| Apache OFBiz | Java enterprise automation framework | Apache-2.0 | Server |
| Axelor Open Suite | Open ERP on a Java framework | AGPL-3.0 | Server |
| iDempiere | Enterprise-grade ERP for complex needs | GPL-2.0 | Server |
Best for: Full ERP closest to Odoo
A full-featured ERP built on the Frappe framework, covering accounting, inventory, manufacturing, HR and CRM.
Best for: Modular ERP and CRM for small businesses
An open-source ERP and CRM package with modules you can enable as needed, written in PHP.
Best for: Java enterprise automation framework
An open-source enterprise automation software suite covering ERP, CRM, e-commerce and supply chain applications.
Best for: Open ERP on a Java framework
A set of business apps for CRM, sales, accounting, supply chain and production built on the Axelor platform.
Best for: Enterprise-grade ERP for complex needs
A community-maintained ERP, CRM and supply chain management suite written in Java.
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| If you need… | Start with |
|---|---|
| The closest full ERP | ERPNext |
| A small business that wants simple modules | Dolibarr |
| Java shop wanting permissive licence | Apache OFBiz |
| Business apps on a Java platform | Axelor Open Suite |
| Complex supply chain and accounting | iDempiere |
Public source code, but under licences the Open Source Initiative doesn't approve. Fine to use; read the terms first.
Source code is public, but the Business Source License is not an open-source licence, so Akaunting does not qualify.
Source code is public, but the Elastic License 2.0 is not OSI-approved.
Quick answers to common questions
Odoo Community is published under the LGPL-3.0. Odoo Enterprise adds proprietary modules.
ERPNext is the closest in breadth. Dolibarr is simpler for small businesses.
No. Akaunting uses BSL 1.1 and Invoice Ninja uses the Elastic License 2.0. Source is public, but neither is OSI-approved.
Odoo exports data as CSV and spreadsheets, but chart-of-accounts and stock history usually need careful mapping.
Basic setups run with Docker or standard web stacks, but ERP customisation generally needs technical help.
List it on TechLogHub and we'll review it for this page.
