Softwr

ERP · head to head

Odoo vs Unit4

Odoo logo

Odoo

ERP

Open-source ERP and CRM suite for all business needs

From
Free
Rated
-
Full reviewWebsite
Unit4 logo

Unit4

ERP

ERP for people-based organisations where the cost centre structure keeps changing

From
$800/month
Rated
-
Full reviewWebsite

The short version

  • Only Odoo has a free tier, so it costs nothing to try first.
  • Each has a real cost: Odoo the free plan is limited to one app, so any second module moves the whole account to a paid per user plan; Unit4 manufacturing, warehouse management and supply chain planning are not the point of this product, so a business with significant inventory will find capability gaps that no amount of configuration closes.
  • They diverge on capability: Odoo covers Sales management, Unit4 covers Flexible organisational model.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Odoo and Unit4 actually diverge.

Attributes where Odoo and Unit4 differ
AttributeOdooUnit4
Starting priceFree$800/month
Free tierYesNo
PlatformsCloud, On-premise, Web, MobileCloud, Web, Mobile
Founded20021987

Identical on both: pricing model (subscription), user rating (Not yet rated), category (ERP).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Odoo

  • Sales management
  • Inventory
  • Accounting
  • CRM
  • Project management
  • E-commerce
  • Email marketing
  • Payment gateways

Only in Unit4

  • Flexible organisational model
  • Project and time accounting
  • Financial management
  • Procurement
  • Human resources
  • Planning and forecasting
  • Reporting
  • Grant and fund accounting

What people use each for

The jobs each tool is most often brought in to do.

Odoo

  • Running ERP, CRM, inventory and accounting from one integrated suitenot Unit4
  • Starting with a single business app and adding modules over timenot Unit4

Unit4

  • A university or public body whose funding structure and reporting hierarchy change more often than its accounting system can keep up withnot Odoo
  • A professional services firm that needs time, project profitability and financials in one ledger rather than in three systemsnot Odoo
  • A nonprofit or NGO accounting for restricted funds and reporting to donors on how each was spentnot Odoo
  • An organisation going through a merger or restructure that needs comparative reporting across both the old and new structuresnot Odoo

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Odoo

  • The free plan is limited to one app, so any second module moves the whole account to a paid per user plan
  • Standard runs $13.50 to $16.90 per user per month and Custom $20.40 to $25.50, both quoted with a yearly discount applied
  • Implementation services and custom development are not included in any plan
  • Odoo.sh hosting is required for custom modules and is charged separately from the subscription
  • SMS credits and AI scanning are billed on top of the per user price

Unit4

  • Manufacturing, warehouse management and supply chain planning are not the point of this product, so a business with significant inventory will find capability gaps that no amount of configuration closes.
  • Payroll is generally handled by a separate product or a regional third party rather than being included, so multi-country organisations end up managing several payroll vendors alongside the ERP.
  • Moving from an established on premise Agresso installation to the current cloud product is closer to a re-implementation than an upgrade, with data migration, process redesign and retraining to pay for on a system that already worked.
  • The consulting and partner ecosystem is considerably smaller than for SAP, Oracle or Microsoft, so specialist skills are harder to hire, cost more, and are concentrated in a small number of firms with limited availability.
  • The flexibility that makes reorganisation cheap also makes it easy to build a model nobody understands, and an organisation that has reconfigured its hierarchy repeatedly without documentation ends up unable to explain its own reporting.

Pricing, plan by plan

Odoo

Free
  • One App FreeFree
    • Unlimited users
    • One app included
    • Hosted on Odoo Online
  • Standard$13.5/month
    • All apps included
    • Odoo Online hosting
    • Unlimited support, hosting and maintenance
  • Custom$20.4/month
    • All apps, multi-company support
    • Odoo Studio access
    • External API access

Unit4

$800/month
  • Professional Services$800/month
    • Project accounting
    • Resource management
    • Time tracking
  • Enterprise$2000/month
    • Advanced features
    • Multi-entity
    • Analytics

Which should you pick?

Choose Odoo if

  • You need sales management.
  • You want to start without paying.
  • You work on Cloud, On-premise, Web, Mobile.
  • You also want inventory.
Odoo review

Choose Unit4 if

  • You need flexible organisational model.
  • You work on Cloud, Web, Mobile.
  • You also want project and time accounting.
Unit4 review

Questions people ask

Is Odoo or Unit4 better?
Neither clearly leads. Odoo starts at Free and Unit4 at $800/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Odoo or Unit4?
Odoo has a free tier; the other does not. Paid plans start at Free for Odoo and $800/month for Unit4.
Does Odoo or Unit4 run on more platforms?
Odoo runs on Cloud, On-premise, Web, Mobile. Unit4 runs on Cloud, Web, Mobile.
Can I use Odoo for free?
Yes. Odoo has a free tier, so you can try it without paying. Unit4 starts at $800/month.
What is Odoo best used for?
Odoo is most often used for running erp, crm, inventory and accounting from one integrated suite, starting with a single business app and adding modules over time. Of those, running erp, crm, inventory and accounting from one integrated suite and starting with a single business app and adding modules over time are not what Unit4 is typically brought in for.
What can Odoo do that Unit4 cannot?
Odoo covers Sales management, Inventory, Accounting, CRM. Unit4 covers Flexible organisational model, Project and time accounting, Financial management, Procurement.

Answered from the vendors’ own pages

Odoo: How much does Odoo cost per user?

Odoo pricing ranges from $0/month for one free app with unlimited users, to $13.50-$16.90/month per user for Standard, and $20.40-$25.50/month per user for Custom, depending on billing frequency (yearly vs monthly).

Source
Unit4: Is Unit4 ERP the same thing as Agresso?

Yes, in lineage. Agresso is the earlier name for the same product line and long-standing customers still use it. Current marketing uses Unit4 ERP, and the cloud product is a substantially different deployment from the on premise Agresso installations still in service.

Odoo: Is there a free Odoo plan?

Yes, Odoo offers a free plan that includes unlimited users for one app with hosting and support included on Odoo Online.

Source
Unit4: Can it run a manufacturing business?

Not well. This product is built for organisations whose cost base is people and projects. If your planning problem is materials and production capacity, look at a manufacturing ERP instead.

Odoo: How does Odoo define a paying user?

A paying user is typically an employee who has access to the Odoo backend to create, view, or edit documents. Customers and suppliers accessing portals are free users and do not count toward the seat limit.

Source
Unit4: What actually justifies the price against a mainstream ERP?

The cost of change. If your structure is stable, the flexibility is worth little and a mainstream product is cheaper. If you reorganise regularly and each reorganisation currently means a consultancy engagement, that recurring cost is where the business case sits.

Odoo: What is included in Odoo's Standard plan?

The Standard plan at $13.50-$16.90/user/month includes all Odoo apps, hosting, unlimited support and maintenance, daily backups, 24/7 monitoring and security, and free eLearning platform access.

Source
Unit4: Is it sold direct or through partners?

Both. Unit4 sells and implements direct in its main markets and also works with partners. Ask which model applies to your region and country, because it determines who is accountable when the implementation slips.

Share

Related pages

More on Odoo

More on Unit4

Keep looking

Other head to heads