Open Mercato vs Odoo - Open Source ERP Comparison 2026

Last updated: March 2026

Odoo is one of the most popular ERP/CRM systems in the world and one of the few that calls itself open source. The catch is that Odoo is split into two editions: Community (free but limited in modules) and Enterprise (a paid subscription with the full feature set). In practice, many critical modules -accounting, marketing automation, the Studio customisation tool -are only available in the Enterprise edition.

Open Mercato is a fully open-source platform -no edition split. Every CRM, ERP and B2B Commerce module is available without licence fees, with full access to the source code. You only pay for hosting and optional implementation services.

Both systems have their strengths. Odoo offers a massive module ecosystem and a mature community. Open Mercato focuses on transparency, fast implementation and no hidden costs. Below we compare both approaches point by point.

Comparison Table

Criterion	Open Mercato	Odoo
Licence	Open source (LGPL) -free, full version	Community: LGPL (limited); Enterprise: paid subscription
Open-source model	100% open source -one product, full code	Open core -free base + paid Enterprise modules
Price	EUR 0 licence -cost is hosting + implementation	Enterprise: from ~$24.90/user/mo + paid modules
Hosting	Self-hosted or cloud -full control	Odoo.sh (cloud), on-premise or Odoo Online (SaaS)
Customisation	Full -source code access, modern stack	Odoo Studio (Enterprise), XML/Python -requires framework knowledge
Module ecosystem	Integrated CRM + ERP + B2B Commerce modules	40,000+ modules (some paid, quality varies)
Implementation time	8-10 weeks	4-16 weeks (depends on module configuration)
Community	Growing -SME-focused	Large, mature -Odoo Community Association (OCA)

Cost Comparison

Users	Open Mercato (yearly)	Odoo Enterprise (yearly)
10 users	~EUR 700 - 1,400 (hosting)	~EUR 2,700 - 4,100 (subscription + modules)
25 users	~EUR 1,200 - 2,400 (hosting)	~EUR 6,800 - 10,200
50 users	~EUR 1,800 - 3,500 (hosting)	~EUR 13,500 - 20,400

* Open Mercato costs cover infrastructure only. Odoo Enterprise costs based on ~$24.90/user/mo (Standard plan) plus typical modules. Odoo Community is free but lacks many key features.

When to choose Odoo

You need very specific industry modules (e.g. manufacturing, fleet management, rental)
Your team already knows the Odoo framework and wants to build on it
You value a massive ecosystem of ready-made integrations and apps
You accept the open-core model and Enterprise subscription for full functionality

When to choose Open Mercato

You want a truly open-source system -no edition split and no hidden fees
You need CRM + ERP + B2B Commerce in one platform without bolting on extra modules
You prefer a modern tech stack and easy customisation
Cost predictability matters -you pay for hosting, not per-user licences
You’re looking for fast implementation (8-10 weeks) without configuring dozens of modules

Looking for a fully open-source ERP with no hidden costs?

Book a free 30-minute call. We’ll show how Open Mercato differs from Odoo and how much you can save.

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Frequently Asked Questions

What's the difference between Open Mercato and Odoo open source models?

Open Mercato is fully open source -all features available without restrictions. Odoo splits into Community (limited) and Enterprise (paid per user). With Odoo, many key features like multi-company, studio editor and full accounting require the paid Enterprise version.

Is Odoo Enterprise cheaper or more expensive than Open Mercato?

Odoo Enterprise costs ~$24.90/user/month plus module fees. At 25 users, that’s $7,500+/year in subscriptions. Open Mercato is a one-time implementation fee plus hosting ($700-2,400/year) -no recurring per-user costs.

Can I migrate from Odoo to Open Mercato?

Yes. We migrate data from both Odoo Community and Enterprise -contacts, products, orders, invoices and inventory. Since both are open source, data access is straightforward.

Does Open Mercato have as many modules as Odoo?

Odoo has a larger module marketplace, but many are community-maintained with varying quality. Open Mercato focuses on core CRM, ERP and B2B Commerce modules that are professionally maintained and deeply integrated.

Which is better for a Polish company: Odoo or Open Mercato?

For Polish SMEs, Open Mercato offers better local integration support -Polish accounting systems (Optima, Symfonia, enova365), Polish-speaking implementation team, and EU data hosting. Odoo’s Polish ecosystem is smaller.