Open-Source ERP Software
Open-source ERP software is freely available under open-source licences (GPL, LGPL). The licence cost is zero, but you pay for implementation, hosting, customisation, training, and optional support contracts. Community editions are fully free; enterprise editions may include paid support.
2 ERP vendors use open-source erp.
Open-Source ERP Advantages
- +Zero software licence cost
- +Full access to source code for customisation
- +Community-driven development and support
- +No vendor lock-in — switch providers or self-host
Open-Source ERP Considerations
- -Implementation and customisation still cost money
- -Self-hosting requires DevOps expertise
- -Smaller partner ecosystem than commercial ERPs
- -Enterprise features may require paid editions or add-ons
Odoo
Odoo SA
Open-source, modular ERP for SMBs on a budget
ERPNext
Frappe Technologies
Free, open-source ERP covering all core business functions
Open-Source ERP Vendor Pricing Comparison
| Vendor | Best For | Starting Price | TCO | Company Size | Implementation | Deployment | Modules | Top Pro |
|---|---|---|---|---|---|---|---|---|
| Odoo | Small businesses and startups wanting affordable, modular ERP | $24.90/user/mo | $10K–$80K | 1–50 employees, 51–250 employees | 1–4 months | 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 | 1–50 employees, 51–250 employees | 1–3 months | Cloud, On-Premise | 13 | Completely free and open source (GPLv3) |
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What Companies Are Saying
“12 million+ users worldwide — fastest-growing open-source ERP”
“Used by 15,000+ companies in 150 countries — 100% free and open-source”
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FAQ
Is open-source ERP really free?
The software licence is free. Total cost includes implementation ($10K–$100K), hosting ($50–$500/mo), customisation, and optional support. ERPNext is fully free (GPLv3). Odoo has a free Community Edition and a paid Enterprise Edition.
What is the best open-source ERP?
Odoo and ERPNext are the leading open-source ERPs. Odoo has 50+ modules and a larger ecosystem. ERPNext is fully free with strong HR, manufacturing, and education modules.
What is the total cost of ownership for open-source ERP?
While licence costs are zero, the 5-year TCO for open-source ERP typically ranges from $25K–$250K depending on scale. Major cost components include: implementation/configuration ($10K–$100K), hosting infrastructure ($3K–$30K/year), ongoing customisation and maintenance ($5K–$50K/year), and training ($2K–$15K). For small businesses, self-hosted ERPNext can achieve a 5-year TCO under $30K.
Can open-source ERP handle enterprise requirements?
Odoo Enterprise Edition and ERPNext both support multi-company, multi-currency, advanced manufacturing, and regulatory compliance. However, they may lack the depth of specialised modules found in SAP or Oracle for complex industries like pharmaceuticals or aerospace. For mid-market companies with standard processes, open-source ERPs are increasingly competitive with commercial alternatives.
How do I choose between Odoo and ERPNext?
Choose Odoo if you need a large app ecosystem (50+ modules), have budget for the Enterprise Edition, or need ecommerce and marketing automation built-in. Choose ERPNext if you want a fully free solution (GPLv3), prioritise manufacturing/HR/education modules, or prefer a Python/JavaScript tech stack. Both offer cloud-hosted and self-hosted options.
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