Best Open Source ERP Software
Open-source ERP software is freely available with source code you can modify. While the software licence is free, costs include implementation, hosting, customisation, and optional support contracts.
2 ERP vendors match this category.
Why Open Source ERP Matters
Open-source ERP eliminates vendor lock-in and licensing costs, giving organisations complete control over their business software. For companies with in-house development talent, the ability to inspect, modify, and extend source code provides unmatched flexibility. Startups and SMBs benefit from zero-cost entry, while larger organisations value the freedom to customise without vendor permission. The growing open-source ERP ecosystem now includes production-grade options with active communities and commercial support.
Evaluation Tips
- →Factor in total cost of ownership — hosting, implementation, and customisation often exceed the savings from free licensing
- →Evaluate the size and activity of the community: frequent commits, responsive forums, and regular releases indicate a healthy project
- →Consider whether you need commercial support contracts for production environments and SLA guarantees
Odoo
Odoo SA
Open-source, modular ERP for SMBs on a budget
ERPNext
Frappe Technologies
Free, open-source ERP covering all core business functions
2 Open Source ERP Vendors Compared
| Vendor | Best For | Starting Price | TCO | Implementation | Company Size | Deployment | Modules | Top Advantage |
|---|---|---|---|---|---|---|---|---|
| Odoo | Small businesses and startups wanting affordable, modular ERP | $24.90/user/mo | $10K–$80K | 1–4 months | 1-50, 51-250 | Cloud, On-Premise | 14 | Community edition is free — lowest barrier to entry |
| ERPNext | Small businesses and startups wanting free, self-hosted ERP | $0 (self-hosted) | $0–$30K | 1–3 months | 1-50, 51-250 | Cloud, On-Premise | 13 | Completely free and open source (GPLv3) |
Top Open Source ERP Vendors
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FAQ
Is open-source ERP really free?
The software licence is free, but you'll still pay for implementation, hosting/infrastructure, customisation, training, and optional support contracts. Total cost can range from $0 for simple self-hosted setups to $100K+ for complex enterprise deployments.
What are the best open-source ERPs?
Odoo and ERPNext are the most popular open-source ERPs. Odoo has a larger ecosystem and more modules, while ERPNext is fully free (GPLv3) with strong HR and manufacturing capabilities.
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