Open-source and free ERP: the real cost

Open-source ERP removes the license, not the cost: hosting, implementation and version upgrades remain. Odoo, the most widely used option, offers one app free with unlimited users; its full Enterprise apps cost $24.90-$61.00 per user per month (odoo.com, 2026-09-17).

Updated 2026-09-23 · 2 sources · By the ERP Cost Guide team

Free vs paid: where the money goes

CostOpen-source (self-hosted)Paid SaaS (e.g. Odoo Standard)
License$0$24.90-$31.10/user/mo (Odoo Standard)
HostingYour servers or cloud VM + admin timeIncluded on Odoo Online
ImplementationPartner or in-houseOdoo Success Packs $3,060-$25,000
UpgradesYou migrate custom modules each versionHandled for standard apps
SupportCommunity forums or a partnerIncluded

When free ERP makes sense

Small, technical teams with simple processes and someone to own the server. Once you need vendor support, upgrades or a partner SLA, compare total cost against Odoo pricing and Business Central pricing.

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Frequently asked questions

Is Odoo free?

One app is free with unlimited users on Odoo Online; multi-app use requires Standard ($31.10/user/mo yearly, $24.90 in year one) or Custom ($61.00).

Sources

  1. Odoo - Pricing (US prices, archived 2026-09-17) (accessed 2026-09-23) - Source date: 2026-09-17
  2. Odoo - Success Packs (US prices, archived 2026-08-09) (accessed 2026-09-23) - Source date: 2026-08-09