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ERP · head to head

ADempiere vs Unanet

ADempiere logo

ADempiere

ERP

Community-run open source ERP forked from Compiere, with no vendor behind it

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 ADempiere has a free tier, so it costs nothing to try first.
  • Each has a real cost: ADempiere there is no company behind it, so there is no support contract to buy, no SLA, no escalation path and no roadmap commitment; if your implementation partner leaves the market you own the problem entirely.; 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: ADempiere 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 ADempiere and Unanet actually diverge.

Attributes where ADempiere and Unanet differ
AttributeADempiereUnanet
Starting priceFreeOn request
Pricing modelOpen source, no licence feequote
Free tierYesNo
PlatformsWeb, Windows, macOS, Linux, Self-hostedWeb, 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 ADempiere

  • Application dictionary
  • Financial accounting
  • Order to cash and procure to pay
  • Inventory and warehouse
  • Manufacturing
  • Point of sale
  • Workflow engine
  • Java and PostgreSQL stack

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.

ADempiere

  • A manufacturer in Latin America with an existing ADempiere consulting partner that needs localised tax and accounting behaviour a global vendor will not buildnot Unanet
  • A company that wants to modify ERP screens and document workflows without a vendor change request, using the application dictionary rather than codenot Unanet
  • An organisation with a hard requirement to keep financial data on its own servers under its own control with no cloud dependencynot Unanet
  • A systems integrator building a vertical ERP product on a permissive base it can fork and ship without paying a licence feenot 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 ADempiere
  • A services firm that must calculate and true up provisional indirect rates each year and cannot do it credibly in Excel any longernot ADempiere
  • An architecture and engineering practice tracking utilisation and project profitability across dozens of concurrent jobsnot ADempiere
  • A government contractor consolidating a separate CRM, timekeeping tool and accounting package into one system so pipeline and backlog reconcilenot ADempiere

Where each one falls short

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

ADempiere

  • There is no company behind it, so there is no support contract to buy, no SLA, no escalation path and no roadmap commitment; if your implementation partner leaves the market you own the problem entirely.
  • The official website adempiere.net does not resolve, which strands most of the historic documentation and tutorials that search engines still point at and makes onboarding a new developer considerably harder.
  • The last conventional stable release, 3.9.4, is from January 2023, so despite ongoing GitHub activity a buyer evaluating on release cadence sees a project moving slowly.
  • iDempiere, a later fork of the same codebase, absorbed much of the developer community, so ADempiere competes for contributors with its own descendant and is the smaller of the two ecosystems.
  • The interface and the Java Swing heritage feel dated, and staff coming from a modern cloud ERP will need training and will complain; expect resistance from finance and warehouse users during rollout.

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

ADempiere

Free
  • Community editionFree
    • GPL v2 licensed, no licence fee
    • Full ERP, CRM, supply chain and POS modules
    • Self-hosted on your own infrastructure

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 ADempiere if

  • You need application dictionary.
  • You want to start without paying.
  • You work on Web, Windows, macOS, Linux, Self-hosted.
  • You also want financial accounting.
ADempiere 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 ADempiere or Unanet better?
Neither clearly leads. ADempiere 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, ADempiere or Unanet?
ADempiere has a free tier; the other does not. Paid plans start at Free for ADempiere and On request for Unanet.
Does ADempiere or Unanet run on more platforms?
ADempiere runs on Web, Windows, macOS, Linux, Self-hosted. Unanet runs on Web, Cloud, iOS, Android.
Can I use ADempiere for free?
Yes. ADempiere has a free tier, so you can try it without paying. Unanet starts at On request.
What is ADempiere best used for?
ADempiere is most often used for a manufacturer in latin america with an existing adempiere consulting partner that needs localised tax and accounting behaviour a global vendor will not build, a company that wants to modify erp screens and document workflows without a vendor change request, using the application dictionary rather than code, an organisation with a hard requirement to keep financial data on its own servers under its own control with no cloud dependency, a systems integrator building a vertical erp product on a permissive base it can fork and ship without paying a licence fee. Of those, a manufacturer in latin america with an existing adempiere consulting partner that needs localised tax and accounting behaviour a global vendor will not build and a company that wants to modify erp screens and document workflows without a vendor change request, using the application dictionary rather than code are not what Unanet is typically brought in for.
What can ADempiere do that Unanet cannot?
ADempiere covers Application dictionary, Financial accounting, Order to cash and procure to pay, Inventory and warehouse. Unanet covers DCAA-oriented timekeeping, Indirect rate management, Contract type support, Project accounting.

Answered from the vendors’ own pages

ADempiere: Should I choose ADempiere or iDempiere?

Look at iDempiere first. It is a later fork of the same codebase with a more active community and a modular OSGi architecture. Choose ADempiere if a specific partner or localisation you need only exists there.

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.

ADempiere: Is ADempiere free?

The software is GPL licensed with no licence fee. The cost is implementation, customisation and permanent in-house maintenance, which for a real deployment is substantial.

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.

ADempiere: Is the project still alive?

Development continues on GitHub with commits into 2026, but the official website is down and the last stable release is from January 2023. Treat it as maintained rather than actively advancing.

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.

ADempiere: What is the application dictionary?

It is the metadata layer inherited from Compiere that stores the definition of every window, field and validation rule as data, so you can change the application without touching source code.

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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