Open-source ERP compared: which option fits which situation
A team shortlisting self-hosted ERP inside its own infrastructure should start by matching the breadth of modules to its licensing tolerance. Odoo fits organizations that want the widest module coverage and can pay for a tier that adds features such as Studio, Documents, Quality and PLM, since those sit only in the Enterprise edition. ERPNext suits teams that want a full-stack ERP under the GPL-3.0 license, built on the Frappe Framework, with accounting, inventory, manufacturing and projects in one codebase. Dolibarr fits smaller organizations that want a lighter modular PHP application for ERP and CRM, where only the modules they need are switched on. Each choice shapes the hosting, upgrade and integration work that follows.
The first decision with Odoo is which edition you are actually running. Odoo Community Edition is licensed under LGPL version 3, while Odoo Enterprise Edition falls under the proprietary Odoo Enterprise Edition License v1.0 and requires a valid Enterprise subscription matching your user count. Enterprise source code is not publicly available, so your security team can review it only through subscription or partner access, not the way it reviews Community code. Not every option is OSI-approved open source in every component, so check each layer of your design: ERPNext's GPL-3.0 application runs on Frappe's MIT-licensed framework, and Dolibarr is GPL-3.0. Ask each vendor which components are open source, which are proprietary, and how license terms change as the user count grows.
Teams with specific needs should look beyond the three main options before deciding. Tryton, iDempiere and Apache OFBiz each serve a narrower profile, and the researched facts for this section do not cover their licenses, edition models or support windows, so confirm those directly with each project and its documentation before shortlisting. Ask for the license of every module you expect to deploy, including add-ons, and record which are copyleft, permissive or proprietary. Also confirm whether a free edition includes the modules you need, because a core edition and a paid edition can cover different functions. Run this check before the vendor demonstrations, not after.
Which option fits which team
Odoo suits teams that want one suite spanning CRM, accounting, inventory, HR, manufacturing and point of sale, and that expect to pay for Enterprise features. The Community edition is LGPL-3.0 and fully open source, but the Enterprise edition is proprietary and requires a subscription that matches your user count. Studio, Documents, Sign, Payroll, PLM, Quality, Field Service, Approvals, Knowledge, the mobile apps, version upgrades and unlimited functional support appear only in Enterprise.
- Feature gap: Studio, PLM, Quality and the mobile apps are Enterprise-only, so map the Community edition against your required processes before you choose it.
- Per-user licensing: Enterprise cost follows headcount, so growth in users is a recurring cost to model.
- Support window: Standard support covers three years after a major release, and security patches come only during that window. Paid extended support is limited to on-premise and selected Odoo.sh versions.
- Upgrade access: The upgrade service requires an Enterprise subscription for on-premise use, and the Community edition has no access to it.
Confirm with Odoo which plan includes the hosting option you need, using the Odoo pricing page as the starting point, and confirm the support end date for the version you plan to deploy.
ERPNext suits teams that want a fully open source ERP under GPL-3.0 covering accounting, order and inventory management, manufacturing, asset management and projects. It runs on the MIT-licensed Frappe Framework, and you can self-host it with Docker or the bench command line tool, or run it on Frappe Cloud. Teams that want the vendor to handle installation, upgrades, monitoring and support should weigh the managed option against the effort of running their own stack.
- Zero software fee: Self-hosting ERPNext is free, so your costs are infrastructure, internal administration and any implementation partner you engage.
- Managed tiers: Frappe Cloud shared site hosting starts at 5 US dollars per month, and shared servers start at 20 US dollars per month, while dedicated servers start at 125 US dollars per month, according to the ERPNext pricing page.
- Version lifecycle: Version 14 reached end of life on January 31, 2026, version 15 is planned for support until the end of 2027, and version 16 until the end of 2029. Warranty coverage requires a listed version and a matching Frappe Cloud support plan.
- Customization limits: Server Scripts are disabled by default from version 15 onward and must be enabled, and Frappe Cloud public shared benches do not allow them.
- Bulk data work: The Data Import tool is documented for a few thousand records at a time, which shapes how you plan migrations.
Before you commit, confirm which hosting tier your customizations need, whether they depend on Server Scripts, and which version line your rollout will run on.
Dolibarr suits small organizations, or teams that want to switch on only the modules they need in a light application. It is a modular PHP application under GPL-3.0, backed by the Dolibarr Association, which was founded in 2009. Its modules cover CRM and sales, invoicing, stock, manufacturing (MRP), point of sale, projects and HR, and it runs on MySQL, MariaDB or PostgreSQL on most common web servers.
- Small footprint: The prerequisites page estimates about 150 MB for program files and 35 MB for an initial database, plus space for documents, and recommends at least a 1 GHz CPU for 30 or more users.
- Module selection: Enable only the modules in use. Confirm that the MRP and stock modules reach the depth your production planning requires.
- Extension path: The DoliStore marketplace and the low-code Module Builder extend the core. Check each add-on's maintenance record and compatibility with your target release.
- Hosted option: DoliCloud offers a Basic plan at 14 euros per user per month and a Premium plan from 45 euros per month, each with a 30-day free trial, per the DoliCloud website. Per-user pricing grows with headcount.
- Release line: Version 24.0.1 followed 24.0.0, and older lines such as 23.0 and 22.0 still received maintenance releases in 2026.
Confirm the module depth, user count and transaction volume against your requirements, and ask the Association or a service provider which support terms apply to your deployment.
Some teams have requirements that the broad suites above do not address directly, such as a specific accounting model, a long-term-support release policy, or a particular language or platform stack. For these cases, Tryton, iDempiere and Apache OFBiz deserve a direct evaluation. The facts for these three projects were not part of the research behind this page, so the licensing, editions, release cadence and hosting details must come from each project and from partners who run them.
- Written requirements first: Define the constraint, such as a support window, an accounting standard or a required platform, before you open any product documentation.
- License and edition check: Confirm whether the features you need are in the community release or in a paid edition, and get the terms in writing.
- Support windows: Ask each project how long each release line receives security fixes, and how upgrades are tested before production use.
- Skills and partners: Check the availability of developers and implementation partners who work with the stack you choose, since this drives the cost of change over time.
- Integration scope: Verify connectors for your identity provider, banking feeds and reporting tools before you shortlist.
Ask each project for its support policy in writing, and request a fixed-scope proposal from an implementation partner before you commit to one platform.
Which ERP fits which scenario
This table matches common scenarios to the platform that usually fits best and states the condition under which each fit holds. Read the third column before shortlisting, because licensing, hosting and support terms often change the answer more than feature lists do. Confirm current terms with each vendor, since the rows reflect only the researched facts.
| Scenario | Best fit and why | Condition for the fit |
|---|---|---|
| Multi-company operations needing Studio or custom modules | Odoo Enterprise on the Custom plan, since multi-company, Studio, external API access and custom modules are listed only there. | Holds if you can fund an Enterprise subscription and host on Odoo.sh or on-premise, which the pricing page ties to the Custom plan. |
| Teams wanting a fully GPL-3.0 stack with a managed option | ERPNext on Frappe Cloud. ERPNext is GPL-3.0, self-hosting is free, and Frappe Cloud offers managed hosting. | Holds if you stay on a listed Frappe version and buy a matching Frappe Cloud support plan for vendor warranty coverage. |
| Small teams needing only specific modules | Dolibarr, where you enable only the modules you use on MySQL, MariaDB or PostgreSQL. | Holds if your required modules appear on the Dolibarr module list and your team can run a PHP application or use the DoliCloud SaaS option. |
| Self-hosted teams that do not need a paid edition | Odoo Community (LGPL-3.0) or ERPNext (GPL-3.0), both usable without an Enterprise subscription. | Holds if the features you need exist in the free edition; confirm which support and security windows apply to community deployments. |
| Teams that plan upgrades on a fixed cadence | Odoo, where Odoo 19 standard support runs until September 2028 and Online and Odoo.sh upgrades are mandatory every two years. | Holds if you can budget for regular upgrades and test each upgraded database before production cutover. |
| Teams with a need Tryton may cover | Tryton, which publishes a six-month release series with five-year LTS releases. | Holds if its module set and integration work match your processes; confirm LTS dates and module coverage directly with Tryton. |
| Teams with iDempiere or Apache OFBiz requirements | iDempiere for teams that want its LTS release line; Apache OFBiz for teams already working in its Java stack. | Holds only after you confirm module coverage, license terms and support windows for your use case. |
What the license and paid editions change for your budget
Odoo's budget question starts with the edition. Odoo Community is licensed under LGPL-3.0, so self-hosting it carries no license fee, but it has no access to the upgrade service. Odoo Enterprise falls under the proprietary Odoo Enterprise Edition License v1.0, which requires a valid Enterprise subscription matching your user count. Its source code is not publicly available, so reading or forking it requires a subscription or partner access. Enterprise-only items include Studio, Documents, Sign, Payroll, Quality and unlimited functional support, so list the processes you need before you model costs. On Odoo's pricing page, on-premise and Odoo.sh hosting are limited to the Custom plan, which also includes multi-company, Studio and external API access. The Enterprise subscription recurs per user, while implementation and customization are separate costs that you should ask to see itemized.
ERPNext and Dolibarr move more of the cost into hosting and services. ERPNext is GPL-3.0, and its pricing page describes self-hosting as free, so your recurring costs are servers, backups, administration and any work from certified partners. If you choose Frappe Cloud, shared site hosting starts at 5 US dollars per month, shared servers at 20 US dollars per month and dedicated servers at 125 US dollars per month, according to ERPNext's pricing page. Frappe's warranty coverage applies only when you run a listed version with a matching Frappe Cloud support plan, so confirm that before you commit to a self-hosted path. Dolibarr is GPL-3.0 and free to self-host, while DoliCloud bills per user: its Basic plan is 14 euros per user per month and Premium starts at 45 euros per month, with a 30-day free trial. Ask whether DoliStore add-ons carry their own fees.
Tryton, iDempiere and Apache OFBiz need checking against their own license terms, because the sources for this comparison do not establish their editions, support fees or hosting charges. Confirm the license text, whether any feature sits behind a paid tier and who sells support for each. Across all platforms, ask every vendor or partner to itemize the quote into license or subscription, hosting, implementation, data migration, upgrades and support, and to state which items recur each year. Odoo Online and Odoo.sh require major version upgrades every two years, so budget that cost as recurring. Ask whether the quote includes an upgraded test database and testing before production, since Odoo's upgrade documentation says that step is required.
How much effort does open-source ERP implementation take?
Is self-hosting open-source ERP cheaper than SaaS?
Self-hosting removes license fees for the community code, but it moves hosting, patching, backups and upgrades onto your budget, so the answer depends on those recurring costs. Odoo Community is LGPL-3.0 and ERPNext is GPL-3.0, and self-hosting ERPNext is free according to its pricing page. Hosted options carry subscription costs: Frappe Cloud shared site hosting starts at 5 US dollars per month, and Odoo prices its plans per user per month. Compare the total over your planned term, including infrastructure, staff time and any paid edition or subscription. Confirm current figures on each vendor's pricing page before you build a model.
What drives ERP implementation effort the most?
Effort rises with the amount of data to move, how far the standard product must be changed, how many systems must connect to it, and how many people will use it. Each driver compounds the others, so a small team with clean data can be far simpler than a multi-company group with legacy records.
- Data migration: cleansing, mapping and loading historic records, including child table rows.
- Customization: custom fields, workflows, reports and server-side logic that must be written, tested and maintained.
- Integrations: banking, payroll, shop floor and e-commerce links, each needing authentication and error handling.
- User count: more users mean more licensing, training and access design.
Can an internal team run open-source ERP without outside help?
A team with Linux, database and web application experience can install and run these platforms itself, provided it can staff ongoing patching, backups and upgrades. ERPNext can be installed with Docker Compose or manually with the bench command line tool, and Odoo offers packaged installers and source installation. The harder question is design: chart of accounts, workflows, access control and integrations usually need functional expertise that a small IT team may lack. Many organizations split the work, keeping routine operations internal and buying implementation or retainer support for the rest. Ask whether your team can staff both build and run phases over the full lifecycle, not only go-live.
How long do ERP upgrades take, and what do they require?
Upgrade effort depends on the version gap, the customizations you carry and how thoroughly you test before production. Odoo's upgrade service moves a database to a newer version through an upgraded test database that should be tested before production, and it requires an Enterprise subscription for on-premise use. On Odoo Online and Odoo.sh, major versions are mandatory every two years. ERPNext and Frappe Framework v16 require MariaDB 11.8, Redis or Valkey 6 or later, Python 3.14 and Node.js 24, so platform upgrades can involve the runtime stack as well as the application. Plan a test environment, a regression test list and a rollback path. Ask any partner for its estimate of these steps in writing.
Which support windows apply to each open-source ERP?
Support windows differ by product and version, so check the window for the exact release you intend to run. Odoo provides standard support with security updates and bug fixes for three years after a major release. Odoo 20 was released in September 2026 with standard support planned until September 2029, and Odoo 19 has standard support until September 2028. Paid extended support is limited to on-premise and selected Odoo.sh versions, and security patches are only provided during standard support. For ERPNext, Frappe lists version 15 as supported until the end of 2027 and version 16 until the end of 2029, with version 14 end of life on January 31, 2026. Dolibarr is maintained through its Dolibarr Association and releases, so confirm the maintenance policy for your line with the project.
How do I request a fixed-scope quote for ERP implementation?
Ask for a written scope that lists processes, modules, data sources, integrations, user groups, environments and acceptance criteria before any price is discussed. DeployOpen does not publish a price list, and most engagements are fixed-scope, with scope, deliverables and timelines agreed in writing before work starts. Send the inventory of systems, a sample of your data, your expected user count, your hosting constraints and your compliance obligations. Ask each provider to separate one-time work, such as migration and configuration, from recurring work, such as hosting, support and upgrades, and to state what it assumes you will provide. Compare quotes on the same scope document.
What does the work need from our internal staff?
Internal staff must supply business decisions, data owners, testers and an operations owner, and these needs often outweigh the technical installation. Expect process owners to approve design choices, finance or operations staff to validate migrated records, and IT to provide servers, database services, identity integration and backup access. Someone must own change approvals for upgrades and test releases. If you plan to use LDAP or social login, involve your identity team early, since Odoo and ERPNext document LDAP integration. Name these owners before the project starts, and confirm their time commitment in the scope.
How to choose and pilot an open-source ERP
This sequence turns a long list of ERP candidates into a short, tested shortlist and a set of fixed-scope quotes that can be compared on equal terms. Each step produces a written artifact that the next step depends on.
Define must-have modules and user count
Operations leads and finance owners list the processes the ERP must run on day one, such as invoicing, stock, manufacturing or projects, and mark which are nice to have. Record the expected named user count and the number of companies or entities that will share one database. Done means a signed-off requirements list that names the processes, the modules that cover them and the user count, because licensing in several of these platforms depends on those numbers.
Check license and paid-edition fit
Procurement and the platform owner compare each candidate's license and paid tiers against the requirements list. For Odoo, confirm whether the features you need sit in Community or only in Enterprise, since Enterprise requires a subscription matching the user count. For ERPNext and Dolibarr, confirm which hosting and add-on features are free and which come from a paid vendor or partner. Done means a one-page matrix showing, for each requirement, the edition, license and recurring cost owner.
Shortlist two or three options
The architecture lead reduces the field to two or three candidates by checking the stack against your hosting standards, including the database engine, Python or PHP runtime and cache layer each platform needs. Confirm with the vendor or community which versions your own environment can support. Done means a shortlist with a written reason for each exclusion, so the pilot budget goes to options that could realistically be deployed in your infrastructure.
Pilot on a database copy with sample data
Build each shortlisted option in a non-production environment and load a copy of real data samples, not synthetic test records. Where the platform offers a data import tool, test it with files of realistic size. ERPNext's Data Import documentation advises importing only a few thousand records at a time, so plan batches accordingly. Test the workflows that matter most, such as an order-to-invoice cycle or a production run. Done means a pilot log recording which workflows passed, which needed customization and the effort each one took.
Test upgrade paths against vendor support windows
The platform owner reads each vendor's support policy and confirms which versions receive security fixes and for how long. Odoo's standard support covers three years after a major release, and security updates stop after that window, so check which version your pilot would run on the day you go live. Run an upgrade rehearsal on a copy of the pilot database and record the steps and any custom code that broke. Done means a dated support calendar per candidate and a rehearsal record showing the upgrade effort you should budget for.
Request fixed-scope quotes from implementers
Send the requirements list, pilot log and upgrade findings to two or three implementers and ask for a written, fixed-scope quote for each candidate. Ask each one to separate license costs, hosting, data migration, customization, integration, testing, training and post-go-live support, and to state which items are one-time and which recur. Also ask who pays for vendor subscriptions and who holds upgrade responsibility. Done means comparable quotes built on the same scope, ready for a final decision.
Where Tryton, iDempiere and Apache OFBiz fit
Tryton, iDempiere and Apache OFBiz are worth a look when a team's requirements sit outside the mainstream fit of Odoo, ERPNext and Dolibarr. Each one has a different license model, development community and expected operator, so the shortlist decision depends on who will run and extend it.
Tryton for modular Python ERP
Tryton is worth shortlisting when your team already writes Python and wants to own its ERP modules. It is a modular, open-source ERP maintained by its own community, separate from the Odoo and Frappe ecosystems. Before you rely on it, confirm the current license and the release series in the project's own documentation, because the supplied facts do not cover them. Then check whether the standard modules cover your accounting, inventory and production needs, and who in your organization or partner network will maintain custom code and upgrades.
iDempiere for Java-based enterprise ERP
iDempiere suits organizations that need a Java-based, community-maintained ERP with deep customization of the data dictionary. It descends from the Adempiere project and is typically chosen by teams with in-house Java and database skills. Confirm its license terms and its long-term support release schedule with the project before planning an upgrade path. Ask whether your integrations, reports and workflows rely on features that exist in the current LTS line, and who will test each upgrade against a copy of production data.
Apache OFBiz for service-oriented ERP
Apache OFBiz is worth considering when a team wants an ERP framework built for custom service-oriented applications. It is an Apache project, so its governance and license follow Apache conventions, which you should verify in its own documentation. OFBiz asks more of the implementing team than a packaged suite, because much of the business logic is assembled and extended in code. Check the depth of standard ERP functions against your requirements, and budget for the internal or partner engineering capacity that a framework-first approach requires.
Confirm license and release windows
Verify license terms and support windows in each project's own documentation before comparing them with the main options. Specialist projects often publish release policies in different places than mainstream vendors, and those policies change. Ask each project for its current license file, its list of supported release lines, and the end-of-support date for the version you would deploy. Record the answers in your evaluation so that upgrade budgets reflect the windows you confirmed, not assumptions carried over from other ERP products.
What running each option costs your team after go-live
Runtime requirements set the baseline for what your platform team must operate every day. Odoo 19 needs Python 3.10 or later and PostgreSQL 13 or later, according to Odoo's source installation documentation. ERPNext v16 on the Frappe Framework needs MariaDB 11.8, Redis or Valkey 6 or later, Python 3.14 and Node.js 24, so a team already standardized on PostgreSQL will be adding a second database engine and a newer language runtime. Dolibarr is the lightest of the three, running on MySQL 5.7.7 or newer, MariaDB 10.3 or newer, or PostgreSQL 9.1.0 or newer on any PHP-capable web server. Confirm these minimums against the version you plan to deploy, because they change between major releases, and check whether your database and runtime patching cycles can absorb them.
Upgrade cadence is the recurring cost most teams underestimate. On Odoo Online and Odoo.sh, major version upgrades are mandatory every two years, and Odoo's upgrade service works through an upgraded test database that you should test before production. Self-hosted Odoo Enterprise on-premise needs a subscription for that upgrade service, and Community has no access to it, so budget the upgrade test cycle and the Enterprise subscription as separate line items. ERPNext publishes frequent minor releases on both supported lines, and the Frappe supported versions page sets end-of-life dates per major version, so plan an upgrade path rather than waiting for a deadline. Ask each vendor or partner to quote the testing, data migration and custom module rework that come with every major upgrade.
How DeployOpen scopes ERP selection and implementation
DeployOpen plans, implements, customizes, integrates, hardens, backs up, upgrades, documents and supports self-hosted open-source platforms inside your own cloud accounts, data centers or air-gapped networks. For an ERP shortlist, that means the platform choice is tested against your licensing, hosting and integration constraints before any build work begins.
How we scope
- Map your required modules, such as accounting, inventory, manufacturing and CRM, against each candidate's edition and module coverage.
- Record which features sit in paid editions, and confirm license terms and user counts in writing before choosing.
- Agree a fixed scope, deliverables and timelines in writing before any implementation work starts.
How we build
- Set up the chosen platform in your environment, following its documented installation path and supported runtime versions.
- Configure data import, integrations and identity connections, and test custom logic on a non-production copy first.
- Run functional and security testing against your data flows, including access controls and upgrade paths.
How we hand over
- Document the architecture, configuration, customizations, backup and restore steps, and upgrade procedure for your team.
- Prepare the systems, controls and evidence your compliance assessors will ask for, without issuing any audit report.
- Walk your administrators through daily operations and agree which future changes stay with your own staff.
How we support
- Offer ongoing support, upgrades and continuous testing as a retainer, scoped separately from the implementation.
- Plan upgrades around each platform's support windows, so you test a new version before it reaches production.
- Ask any provider, including DeployOpen, to confirm support terms, versions covered and response commitments in the quote.
