ERP · head to head
ADempiere vs Deltek
ADempiere
ERP
Community-run open source ERP forked from Compiere, with no vendor behind it
- From
- Free
- Rated
- -
Deltek
ERP
Project-based business management and accounting software
- From
- $1500/month
- Rated
- -
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.; 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
- They diverge on capability: ADempiere covers Application dictionary, Deltek covers Project accounting.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which ADempiere and Deltek actually diverge.
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 Deltek
- Project accounting
- Resource management
- Time and expense
- Financial reporting
- Government compliance
- Office 365
- Outlook
- Tableau
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 Deltek
- A company that wants to modify ERP screens and document workflows without a vendor change request, using the application dictionary rather than codenot Deltek
- An organisation with a hard requirement to keep financial data on its own servers under its own control with no cloud dependencynot Deltek
- A systems integrator building a vertical ERP product on a permissive base it can fork and ship without paying a licence feenot Deltek
Deltek
- Government contracting project accounting and compliance managementnot ADempiere
- Aerospace and defense ERP with FAR/CAS requirementsnot ADempiere
- Architecture and engineering firm resource planning and billingnot ADempiere
- Construction cost tracking, labor management, and job costingnot ADempiere
- Professional services resource scheduling and utilizationnot 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.
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
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
Deltek
$1500/month- Vantagepoint$1500/month
- Project accounting
- Professional services
- Resource management
- Vantagepoint Enterprise$3500/month
- Advanced features
- Multi-entity
- Advanced analytics
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.
Choose Deltek if
- You need project accounting.
- You work on Cloud, Web, Mobile.
- You also want resource management.
Questions people ask
- Is ADempiere or Deltek better?
- Neither clearly leads. ADempiere starts at Free and Deltek at $1500/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, ADempiere or Deltek?
- ADempiere has a free tier; the other does not. Paid plans start at Free for ADempiere and $1500/month for Deltek.
- Does ADempiere or Deltek run on more platforms?
- ADempiere runs on Web, Windows, macOS, Linux, Self-hosted. Deltek runs on Cloud, Web, Mobile.
- Can I use ADempiere for free?
- Yes. ADempiere has a free tier, so you can try it without paying. Deltek starts at $1500/month.
- 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 Deltek is typically brought in for.
- What can ADempiere do that Deltek cannot?
- ADempiere covers Application dictionary, Financial accounting, Order to cash and procure to pay, Inventory and warehouse. Deltek covers Project accounting, Resource management, Time and expense, Financial reporting.
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.
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.
SourceADempiere: 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.
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.
SourceADempiere: 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.
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.
SourceADempiere: 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.
Related pages
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