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ERP · head to head

iDempiere vs Unanet

iDempiere logo

iDempiere

ERP

Community-governed open source ERP, CRM and supply chain built on Java, OSGi and PostgreSQL

From
Free
Rated
-
Full reviewWebsite
Unanet logo

Unanet

ERP

Project ERP and CRM built for government contractors and architecture and engineering firms

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only iDempiere has a free tier, so it costs nothing to try first.
  • Each has a real cost: iDempiere there is no vendor, so there is no support contract, no service level agreement and nobody to escalate to; you either build the skills internally or you depend entirely on a local partner whose quality you must judge yourself.; Unanet no pricing is published for any Unanet product; every line is quoted per user per month with separate implementation fees, so a small contractor cannot budget the first year without a full sales cycle.
  • They diverge on capability: iDempiere covers Application dictionary, Unanet covers DCAA-oriented timekeeping.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which iDempiere and Unanet actually diverge.

Attributes where iDempiere and Unanet differ
AttributeiDempiereUnanet
Starting priceFreeOn request
Pricing modelOpen source, no licence feequote
Free tierYesNo
PlatformsWeb, Self-hosted, Docker, Linux, WindowsWeb, Cloud, iOS, Android

Identical on both: 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 iDempiere

  • Application dictionary
  • OSGi plug-in architecture
  • Multi-organisation accounting
  • Materials management
  • Manufacturing
  • Workflow engine
  • Report and print engine
  • No paid edition

Only in Unanet

  • DCAA-oriented timekeeping
  • Indirect rate management
  • Contract type support
  • Project accounting
  • Resource planning
  • Unanet CRM
  • Compliant invoicing
  • Unanet ERP AE

What people use each for

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

iDempiere

  • A distributor wants multi-organisation, multi-currency accounting and warehouse costing without a per-user ERP licence that scales with headcount.not Unanet
  • An organisation that has been caught by an open core vendor moving features into a paid tier wants an ERP with no company that can make that decision.not Unanet
  • A team needs heavy customisation of screens, fields and approval workflows that must survive version upgrades, which the application dictionary makes possible without forking.not Unanet
  • A public sector or university body in Latin America or Indonesia needs a locally supportable ERP where the source and the implementation skills are both available in-country.not Unanet

Unanet

  • A federal contractor moving from QuickBooks and spreadsheets because it has won its first cost-reimbursable contract and needs an accounting system that survives a DCAA adequacy reviewnot iDempiere
  • A services firm that must calculate and true up provisional indirect rates each year and cannot do it credibly in Excel any longernot iDempiere
  • An architecture and engineering practice tracking utilisation and project profitability across dozens of concurrent jobsnot iDempiere
  • A government contractor consolidating a separate CRM, timekeeping tool and accounting package into one system so pipeline and backlog reconcilenot iDempiere

Where each one falls short

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

iDempiere

  • There is no vendor, so there is no support contract, no service level agreement and nobody to escalate to; you either build the skills internally or you depend entirely on a local partner whose quality you must judge yourself.
  • It demands real Java, OSGi and PostgreSQL administration, so the running cost is a systems engineer rather than a subscription, and that engineer is harder to hire than a PHP developer.
  • The ZK-based interface is dense and dated, with a data-entry feel inherited from Compiere that staff used to modern software find hostile, which drives up training cost.
  • Localisation depends on community contribution, so tax, payroll and statutory reporting for your country may be absent, out of date or maintained by one person, and you may end up funding it yourself.
  • The documentation is a community wiki with gaps and stale pages, and much of the practical knowledge sits in forum threads and partner heads rather than in anything you can hand to a new administrator.

Unanet

  • No pricing is published for any Unanet product; every line is quoted per user per month with separate implementation fees, so a small contractor cannot budget the first year without a full sales cycle.
  • Implementation is a project rather than a signup, involving chart of accounts design, indirect pool structure and data migration, and third parties report implementation fees reaching five figures for mid-sized deployments, an amount easily missed when comparing per-user rates.
  • The interface is dated compared with modern SaaS finance products, which raises training time for staff who only touch it to enter a timesheet and increases the support burden on the finance team.
  • ERP and CRM are separate products with separate contracts, so a firm that wants pipeline, backlog and actuals in one place pays twice and still deals with an integration boundary between them.
  • Its value is concentrated in United States federal and state contracting compliance, so a firm that does no public-sector work is paying for indirect rate machinery and DCAA audit behaviour it will never use, and a non-US firm gets almost nothing from the product’s main differentiator.

Pricing, plan by plan

iDempiere

Free
  • iDempiereFree
    • Full ERP, CRM and supply chain source
    • Unlimited users and organisations
    • No enterprise edition and no feature gating
  • Implementation partner$undefined/year
    • Local partners provide installation, configuration, training and support
    • Priced per engagement, not published
    • Realistically the only viable route for a production deployment

Unanet

On request
  • Unanet ERP GovCon$undefined/year
    • Project accounting with indirect rate pools
    • DCAA-oriented daily timekeeping and audit trail
    • Cost-plus, T&M and fixed price contract billing
  • Unanet ERP AE$undefined/year
    • Project accounting configured for architecture and engineering firms
    • Resource planning and utilisation reporting
    • Priced per user per month, quoted
  • Unanet CRM$undefined/year
    • Pursuit and opportunity tracking
    • Proposal content library and reuse
    • Sold separately from ERP; quoted

Which should you pick?

Choose iDempiere if

  • You need application dictionary.
  • You want to start without paying.
  • You work on Web, Self-hosted, Docker, Linux, Windows.
  • You also want osgi plug-in architecture.
iDempiere review

Choose Unanet if

  • You need dcaa-oriented timekeeping.
  • You work on Web, Cloud, iOS, Android.
  • You also want indirect rate management.
Unanet review

Questions people ask

Is iDempiere or Unanet better?
Neither clearly leads. iDempiere starts at Free and Unanet at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, iDempiere or Unanet?
iDempiere has a free tier; the other does not. Paid plans start at Free for iDempiere and On request for Unanet.
Does iDempiere or Unanet run on more platforms?
iDempiere runs on Web, Self-hosted, Docker, Linux, Windows. Unanet runs on Web, Cloud, iOS, Android.
Can I use iDempiere for free?
Yes. iDempiere has a free tier, so you can try it without paying. Unanet starts at On request.
What is iDempiere best used for?
iDempiere is most often used for a distributor wants multi-organisation, multi-currency accounting and warehouse costing without a per-user erp licence that scales with headcount., an organisation that has been caught by an open core vendor moving features into a paid tier wants an erp with no company that can make that decision., a team needs heavy customisation of screens, fields and approval workflows that must survive version upgrades, which the application dictionary makes possible without forking., a public sector or university body in latin america or indonesia needs a locally supportable erp where the source and the implementation skills are both available in-country.. Of those, a distributor wants multi-organisation, multi-currency accounting and warehouse costing without a per-user erp licence that scales with headcount. and an organisation that has been caught by an open core vendor moving features into a paid tier wants an erp with no company that can make that decision. are not what Unanet is typically brought in for.
What can iDempiere do that Unanet cannot?
iDempiere covers Application dictionary, OSGi plug-in architecture, Multi-organisation accounting, Materials management. Unanet covers DCAA-oriented timekeeping, Indirect rate management, Contract type support, Project accounting.

Answered from the vendors’ own pages

iDempiere: Is iDempiere the same as ADempiere or Compiere?

It shares the lineage. iDempiere forked from ADempiere in 2011 to rebuild the platform on OSGi, and it is the branch that remains actively developed.

Unanet: What does Unanet cost?

Nothing is published. Pricing is per user per month and quoted, with implementation fees charged separately on top of the subscription.

iDempiere: Is there a paid or enterprise edition?

No. There is no commercial owner and no feature gating. Money is spent on implementation partners and hosting, not on licences.

Unanet: Does Unanet make you DCAA compliant?

No software does. Unanet provides the timekeeping controls, audit trail and indirect rate accounting that an adequacy review looks for; the policies and their enforcement are still yours.

iDempiere: What does it actually cost to run?

Nothing in licence fees, and a great deal in skills: expect a partner implementation and ongoing Java and PostgreSQL administration, which for a mid-sized company is comparable to a commercial subscription.

Unanet: Is Unanet CRM included with the ERP?

No. Unanet CRM, built on the acquired Cosential platform, is a separate product with its own contract.

iDempiere: Which database does it need?

PostgreSQL or Oracle. PostgreSQL is the mainstream community choice and the one most partners deploy.

Unanet: How does it compare with Deltek?

Unanet typically targets smaller contractors than Deltek Costpoint and is quicker to implement, but has less depth for very large multi-segment organisations.

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