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ERP · head to head

Deltek vs iDempiere

Deltek logo

Deltek

ERP

Project-based business management and accounting software

From
$1500/month
Rated
-
Full reviewWebsite
iDempiere logo

iDempiere

ERP

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

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only iDempiere has a free tier, so it costs nothing to try first.
  • Each has a real cost: Deltek not one product but a portfolio, including Costpoint, Vantagepoint, Maconomy, Ajera, ComputerEase, GovWin IQ and Replicon, so the right choice depends on the industry before the feature set; 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.
  • They diverge on capability: Deltek covers Project accounting, iDempiere covers Application dictionary.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Deltek and iDempiere actually diverge.

Attributes where Deltek and iDempiere differ
AttributeDeltekiDempiere
Starting price$1500/monthFree
Pricing modelsubscriptionOpen source, no licence fee
Free tierNoYes
PlatformsCloud, Web, MobileWeb, Self-hosted, Docker, Linux, Windows
Founded1983Unknown

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 Deltek

  • Project accounting
  • Resource management
  • Time and expense
  • Financial reporting
  • Government compliance
  • Office 365
  • Outlook
  • Tableau

Only in iDempiere

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

What people use each for

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

Deltek

  • Government contracting project accounting and compliance managementnot iDempiere
  • Aerospace and defense ERP with FAR/CAS requirementsnot iDempiere
  • Architecture and engineering firm resource planning and billingnot iDempiere
  • Construction cost tracking, labor management, and job costingnot iDempiere
  • Professional services resource scheduling and utilizationnot iDempiere

iDempiere

  • A distributor wants multi-organisation, multi-currency accounting and warehouse costing without a per-user ERP licence that scales with headcount.not Deltek
  • 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 Deltek
  • 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 Deltek
  • 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 Deltek

Where each one falls short

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

Deltek

  • Not one product but a portfolio, including Costpoint, Vantagepoint, Maconomy, Ajera, ComputerEase, GovWin IQ and Replicon, so the right choice depends on the industry before the feature set
  • Pricing is not published anywhere and requires contacting sales
  • Built around project-based industries such as government contracting, architecture and engineering rather than general business

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.

Pricing, plan by plan

Deltek

$1500/month
  • Vantagepoint$1500/month
    • Project accounting
    • Professional services
    • Resource management
  • Vantagepoint Enterprise$3500/month
    • Advanced features
    • Multi-entity
    • Advanced analytics

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

Which should you pick?

Choose Deltek if

  • You need project accounting.
  • You work on Cloud, Web, Mobile.
  • You also want resource management.
Deltek review

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

Questions people ask

Is Deltek or iDempiere better?
Neither clearly leads. Deltek starts at $1500/month and iDempiere at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Deltek or iDempiere?
iDempiere has a free tier; the other does not. Paid plans start at $1500/month for Deltek and Free for iDempiere.
Does Deltek or iDempiere run on more platforms?
Deltek runs on Cloud, Web, Mobile. iDempiere runs on Web, Self-hosted, Docker, Linux, Windows.
Can I use iDempiere for free?
Yes. iDempiere has a free tier, so you can try it without paying. Deltek starts at $1500/month.
What is Deltek best used for?
Deltek is most often used for government contracting project accounting and compliance management, aerospace and defense erp with far/cas requirements, architecture and engineering firm resource planning and billing, construction cost tracking, labor management, and job costing. Of those, government contracting project accounting and compliance management and aerospace and defense erp with far/cas requirements are not what iDempiere is typically brought in for.
What can Deltek do that iDempiere cannot?
Deltek covers Project accounting, Resource management, Time and expense, Financial reporting. iDempiere covers Application dictionary, OSGi plug-in architecture, Multi-organisation accounting, Materials management.

Answered from the vendors’ own pages

Deltek: How much does Deltek Costpoint cost?

Deltek does not display pricing for Costpoint or other products on its website. Enterprise ERP pricing requires contact with Deltek sales.

Source
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.

Deltek: What is the cost of Deltek Vantagepoint for architecture firms?

Deltek does not publish Vantagepoint pricing on its website. Pricing depends on firm size, employee count, and feature requirements.

Source
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.

Deltek: Do Deltek cloud ERP solutions charge per user?

Deltek offers cloud ERP products but does not disclose per-user, per-month, or subscription rate information on its public website.

Source
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.

iDempiere: Which database does it need?

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

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