Dolibarr is itself a free, open-source ERP and CRM (GPLv3), covering invoicing, stock, orders, and point-of-sale in one modular, self-hosted web app. So this comparison is between two open-source ERP platforms rather than open source replacing a proprietary system.
If you need deeper accounting, HR, and inventory modules for a larger organization rather than Dolibarr's lighter, module-as-needed approach aimed at SMEs and freelancers, ERPNext is the more full-featured comparison.
FAQ
Is there a free, open-source alternative to Dolibarr?
Dolibarr is already free and open source. If you want a different open-source ERP with a broader feature set, ERPNext is a solid alternative.
What's the best open-source alternative to Dolibarr?
ERPNext is the better pick for larger organizations needing deeper accounting, HR, and manufacturing modules than Dolibarr's lighter, SME-focused module set.
What are the top open-source alternatives to Dolibarr?
Browse all open-source alternatives to Dolibarr above, or explore the full Business Software category for more options.