1. Open-Source Nature

• ERPNext: Fully open-source with no premium paid versions. All modules are accessible under an open-source license.
• Odoo: The community version is open-source, but the enterprise version includes premium features that are not free.

2. Ease of Use

• ERPNext: Known for its clean and user-friendly interface. It’s relatively straightforward for beginners to navigate.
• Odoo: Offers a more modern and polished UI, but with more modules and functionalities, the learning curve can be steeper.

3. Customization

• ERPNext: Highly customizable, allowing users to easily modify forms, workflows, and reports. However, extensive customizations might require developer support.
• Odoo: Customizable, but offers more flexibility through its modular structure. Developers have a wide range of customization options, especially in the enterprise version. You will have dependency.

4. Modularity

• ERPNext: Comes with a set of core modules (sales, purchase, inventory, accounting and manufacturing) that cover most business needs. Additional modules are more limited compared to Odoo.
• Odoo: Extremely modular with thousands of apps and modules (both official and third-party) that can be installed as needed. Integration and support for each app can become challenging.

5. Cost

• ERPNext: Generally lower cost since it is completely open-source. Hosted versions are cheaper, and self-hosting has no licensing fees.
• Odoo: The community version is free, but the enterprise version can be expensive depending on the number of users and modules. Odoo also charges for hosting and certain add-ons.

8. Implementation

• ERPNext: Easier and faster to implement for standard business processes, especially for smaller businesses with straightforward requirements.
• Odoo: Implementation can be more complex, particularly if the enterprise version or multiple modules are involved. However, it offers more customization and scalability for larger organizations.

9. Community and Support

• ERPNext: Has an active and supportive community. Official support and consulting services are available, but the ecosystem is smaller compared to Odoo.
• Odoo: OCA is muc bigger, but has stagnated, specially after the open core version by Odoo.

10. Scalability

• ERPNext: Suitable for growing SMEs, but may require customization and scaling support for large enterprises with complex requirements. With good tech backend, even the large enterprises like Zerodha has implemented it, having trillions of database rows.
• Odoo: Horizontally scalable due to its extensive app ecosystem, making it work for businesses that need advanced functionalities and can afford enterprise licenses.

Conclusion

• ERPNext is ideal for all sizes of business, specially SME businesses looking for a cost-effective, open-source ERP with essential modules and easy customization.
• Odoo offers wider range of modules, making it suitable for businesses with complex needs but willing to invest more in customization and support.