Softwr

Inventory · head to head

Odoo Inventory vs Unit4

Odoo Inventory logo

Odoo Inventory

Inventory

Open source inventory management module

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 Inventory has a free tier, so it costs nothing to try first.
  • Each has a real cost: Odoo Inventory the One App Free plan covers a single app, so using Inventory alongside another Odoo app moves the account onto a paid 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 Inventory covers Inventory 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 Inventory and Unit4 actually diverge.

Attributes where Odoo Inventory and Unit4 differ
AttributeOdoo InventoryUnit4
Starting priceFree$800/month
Free tierYesNo
PlatformsWeb, Mobile app, Cloud/On-premiseCloud, Web, Mobile
CategoryInventoryERP
Founded20051987

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

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 Inventory

  • Inventory management
  • Barcode scanning
  • Multi-warehouse
  • Automated replenishment
  • Odoo ERP modules
  • E-commerce
  • Manufacturing
  • Accounting

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 Inventory

  • Tracking stock across multiple warehouses and locationsnot Unit4
  • Running receipts, deliveries and internal transfersnot Unit4
  • Connecting inventory to Odoo sales, purchasing and manufacturingnot 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 Inventory
  • A professional services firm that needs time, project profitability and financials in one ledger rather than in three systemsnot Odoo Inventory
  • A nonprofit or NGO accounting for restricted funds and reporting to donors on how each was spentnot Odoo Inventory
  • An organisation going through a merger or restructure that needs comparative reporting across both the old and new structuresnot Odoo Inventory

Where each one falls short

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

Odoo Inventory

  • The One App Free plan covers a single app, so using Inventory alongside another Odoo app moves the account onto a paid plan
  • The Standard plan at $16.90 per user per month is restricted to Odoo Online hosting
  • Odoo.sh and on premise hosting require the Custom plan at $25.50 per user per month
  • Odoo Studio, multi company management and external API access require the Custom plan
  • Billing is per user, defined as any employee with backend access to create, view or edit documents
  • The advertised discounted rates apply for the first 12 months, after which the list rates of $21.10 and $31.90 per user per month apply

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 Inventory

Free
  • CommunityFree
    • Open source
    • Basic features
    • Community support
  • Standard$20/month
    • Full features
    • Hosting included
    • Email support
  • Custom$40/month
    • Customization
    • Studio access
    • Priority support

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 Inventory if

  • You need inventory management.
  • You want to start without paying.
  • You work on Web, Mobile app, Cloud/On-premise.
  • You also want barcode scanning.
Odoo Inventory 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 Inventory or Unit4 better?
Neither clearly leads. Odoo Inventory 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 Inventory or Unit4?
Odoo Inventory has a free tier; the other does not. Paid plans start at Free for Odoo Inventory and $800/month for Unit4.
Does Odoo Inventory or Unit4 run on more platforms?
Odoo Inventory runs on Web, Mobile app, Cloud/On-premise. Unit4 runs on Cloud, Web, Mobile.
Can I use Odoo Inventory for free?
Yes. Odoo Inventory has a free tier, so you can try it without paying. Unit4 starts at $800/month.
What is Odoo Inventory best used for?
Odoo Inventory is most often used for tracking stock across multiple warehouses and locations, running receipts, deliveries and internal transfers, connecting inventory to odoo sales, purchasing and manufacturing. Of those, tracking stock across multiple warehouses and locations and running receipts, deliveries and internal transfers are not what Unit4 is typically brought in for.
What can Odoo Inventory do that Unit4 cannot?
Odoo Inventory covers Inventory management, Barcode scanning, Multi-warehouse, Automated replenishment. Unit4 covers Flexible organisational model, Project and time accounting, Financial management, Procurement.

Answered from the vendors’ own pages

Odoo Inventory: How much does the Odoo Inventory app cost?

The Odoo Inventory app is free, forever, with unlimited users at no cost. Additional costs only apply if you install other applications in the Odoo suite.

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 Inventory: Do I need to pay to use Odoo Inventory?

No, Odoo Inventory is completely free with no credit card required to start. The free trial and app remain free indefinitely.

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.

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.

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 Inventory

More on Unit4

Keep looking

Other head to heads