Odoo

by Odoo S.A.

Odoo is a suite of open-source business apps. Accounting, inventory, CRM, e-commerce, manufacturing. That can start tiny and grow module by module. The hosted edition is among the cheapest paths to a real ERP, with the trade-off of lighter accounting depth (especially US GAAP/fund accounting) and reliance on partners or in-house devs for customization.

Best for

Budget-conscious small businesses that want modular growth

Reported pricing

From ~$25/user/mo (all apps, hosted)

Organization size

Small (under 50 employees) · Mid-market (50–500 employees)

Deployment

Cloud · On-premises

Fund accounting

No (or via add-ons)

Multi-entity consolidation

Yes

Where it wins

✓ Very low entry cost
✓ Huge module range
✓ Open source, no lock-in

Where it doesn't

✗ Accounting depth below dedicated finance platforms
✗ Quality depends on partner/developer
✗ No native fund accounting

Strengths

Budget-friendlyOpen sourceInventory & distributionManufacturing

Common industries

Retail & E-commerce · Wholesale & Distribution · Manufacturing · Services

Integrations

Extensive ecosystem

Odoo Apps Store. By far the largest of any ERP in this directory: 10,000+ apps per Odoo's own count in 2025, with third-party trackers citing 16,000+.

Notable integrations

Shopify (native connector, bidirectional)Stripe, PayPal, Adyen, Authorize.Net (bundled, no surcharge)AvaTax / Avalara (native tax engine)Zapier, Make, and Workato all have dedicated Odoo connectors

API quality: XML-RPC/JSON-RPC (mature, but slated for removal in Odoo 22 / fall 2028) plus a newer REST API. Note: external API access is gated to Custom/Enterprise pricing plans, not available on the free tier.

What doesn't connect cleanly

— Anyone can publish a module. Third-party app quality varies widely and can break core functionality
— Major version upgrades routinely break custom integrations; Odoo does not guarantee backward compatibility for custom modules across versions
— Deeper integrations (e.g. Google Workspace) often still require paid third-party apps or custom dev despite the huge catalog

Head to head

vs ERPNext

Not sure if Odoo fits?

Take the 2-minute matching quiz