Open source master data management: the licence is free, and that is the only part

The vendor sent a quote. It had six figures and an implementation partner attached, and somebody in the meeting said: what about open source master data management? It is a fair question. I would ask it too.

The trouble is the answer most pages give you. The lists that rank for this search still name Talend Open Studio for MDM, and some still call Pimcore GPL. Both facts expired. So start with what is on the shelf in 2026.

What is left on the list

Talend Open Studio for MDM is gone. Qlik retired the whole Open Studio line on 31 January 2024. Qlik no longer hosts the download and ships no security patches. An existing install keeps running. It also keeps every vulnerability found after that date.

Pimcore changed its licence. Version 2024.4 was the last release under GPLv3. From 2025.1 the Community Edition uses the Pimcore Open Core License, and free use stops at five million euros of annual turnover. Most companies shopping for MDM are past that line. Pimcore is also a PIM first: it is very good at product content for web shops, and less of a fit for suppliers, cost centres or locations.

AtroCore is the one real open source candidate left. It is GPLv3, written in PHP, and runs on PostgreSQL, MySQL or MariaDB. The core and a set of modules are free. The integrations with ERP and e-commerce systems are paid premium modules, which is a fair model. Count them before you write "free" in the business case.

OpenMetadata and DataHub show up in these searches too. I like both. They are also catalogues. They tell you which tables exist and what a column means. They do not decide which of three supplier addresses is the right one. The difference between MDM and a data catalogue matters here, because buying the wrong one costs a year.

What a free licence hands back to you

Storing a record is the easy part of MDM. A table does that. The money in a commercial product goes into the parts around the table, and with open source those parts are yours to configure, extend or write:

So the price moves from the licence to your team. If you have PHP developers with spare time and someone who owns the upgrades, AtroCore can be a good deal. If your team is two DBAs who think in T-SQL, the cheapest tool is the one that runs on what they already know.

Four questions before you pick one

Who patches it? Name the person. If nobody comes to mind, the answer is nobody, and you have just found the Talend problem in advance.

Does the licence still fit in three years? Pimcore moved from GPL to a turnover limit in one release. Read the current terms, and ask what happens if the company grows past them.

Which modules do you need, and which are paid? Approval, connectors and single sign-on are where open core products tend to draw the line. Make the list before the demo, not after.

Does it run on your stack? A PHP application on PostgreSQL in a Microsoft shop is a second platform to back up, monitor and secure. That cost never shows up on a licence comparison.

Where we fit, and where we do not

Primentra is not open source, so take this part as the vendor talking. It costs €7,500 a year per production server, with unlimited users and no per-seat fees. It runs on your own SQL Server, and the data sits in your tables. Approval workflows and the audit trail are in the product, not a module, and integration views give your ERP and reports a plain SQL view to read.

It does not do match-and-merge, and it does not publish product content to web shops. If that is your problem, look at the PIM tools. If your problem is a supplier list in three Excel files and a SQL Server team that lost MDS, we are probably cheaper than the hours an open source build takes. For the whole field, open source included, see how to choose an MDM tool.

Common questions

Licence terms change. The facts above are checked as of October 2026. If you find one that moved, tell us and we will fix it.