Softwr

ERP · head to head

iDempiere vs Tendenci

iDempiere logo

iDempiere

ERP

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

From
Free
Rated
-
Full reviewWebsite
Tendenci logo

Tendenci

Nonprofits

Open-source association management system for nonprofits

From
Free
Rated
-
Full reviewWebsite

The short version

  • 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.; Tendenci self-hosting is a real operational commitment, and organisations without technical capacity should not treat the free licence as a free system
  • They diverge on capability: iDempiere covers Application dictionary, Tendenci covers Open-source licence.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which iDempiere and Tendenci actually diverge.

Attributes where iDempiere and Tendenci differ
AttributeiDempiereTendenci
Pricing modelOpen source, no licence feeOpen source, with paid hosting available
PlatformsWeb, Self-hosted, Docker, Linux, WindowsWeb, Linux, Self-hosted, Cloud
CategoryERPNonprofits

Identical on both: starting price (Free), free tier (Yes), 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 iDempiere

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

Only in Tendenci

  • Open-source licence
  • Membership management
  • Events and registration
  • Donations
  • Content-managed website
  • Email

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 Tendenci
  • 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 Tendenci
  • 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 Tendenci
  • 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 Tendenci

Tendenci

  • Nonprofits whose boards require member and donor data to stay under their own controlnot iDempiere
  • Organisations with data residency obligations a hosted platform cannot satisfynot iDempiere
  • Groups with technical capacity wanting to avoid per-member subscription costs at scalenot iDempiere
  • Associations needing to customise workflows beyond what a proprietary platform allowsnot 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.

Tendenci

  • Self-hosting is a real operational commitment, and organisations without technical capacity should not treat the free licence as a free system
  • The community is small compared with mainstream open-source projects, so answers are harder to find and contributors are few
  • The interface is dated against the commercial association platforms and this is the most common user complaint
  • Fewer integrations than commercial competitors, and building them is a development task rather than a configuration one
  • Feature depth in events and continuing education is behind the specialist commercial systems

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

Tendenci

Free
  • Self-hostedFree
    • Full source code
    • No per-member licence
    • Community support
  • Managed hosting$undefined/month
    • Hosted and maintained
    • Updates applied
    • Support included

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 Tendenci if

  • You need open-source licence.
  • You want to start without paying.
  • You work on Web, Linux, Self-hosted, Cloud.
  • You also want membership management.
Tendenci review

Questions people ask

Is iDempiere or Tendenci better?
Neither clearly leads. iDempiere starts at Free and Tendenci at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, iDempiere or Tendenci?
iDempiere starts at Free and Tendenci at Free.
Does iDempiere or Tendenci run on more platforms?
iDempiere runs on Web, Self-hosted, Docker, Linux, Windows. Tendenci runs on Web, Linux, Self-hosted, Cloud.
Can I use iDempiere for free?
Both have a free tier, so you can try either at no cost before committing.
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 Tendenci is typically brought in for.
What can iDempiere do that Tendenci cannot?
iDempiere covers Application dictionary, OSGi plug-in architecture, Multi-organisation accounting, Materials management. Tendenci covers Open-source licence, Membership management, Events and registration, Donations.

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.

Tendenci: Is Tendenci really free?

The software is, under an open-source licence with no per-member fee. Running it is not: hosting, updates, backups and security are the organisation responsibility unless managed hosting is purchased.

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.

Tendenci: Who should choose it?

Organisations with a genuine requirement to control their own data, and the technical capacity to act on it. Choosing it purely to avoid subscription cost usually ends badly.

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.

Tendenci: Can I move my data out?

Yes, entirely. That is the point. Data lives in a PostgreSQL database you control, and there is no vendor holding it.

iDempiere: Which database does it need?

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

Tendenci: How does it compare to Wild Apricot?

Wild Apricot is easier, better supported and better looking. Tendenci is the answer when data ownership is a requirement rather than a preference.

Tendenci: Is it actively maintained?

It is developed openly on GitHub with a small team and community. Check recent commit activity before committing, as with any small open-source project.

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