---
title: Apache Solr for TYPO3 - Open source
url: "https://www.typo3-solr.com/what-is-solr/open-source/"
description: "Open source licences: Apache Solr under Apache Licence 2.0; the TYPO3 extension Apache Solr for TYPO3 under GNU GPL v2 or newer. Links to the licences."
date: 2021-08-30
modified: 2025-11-04
lastUpdated: 2025-12-05
---

# Apache Solr for TYPO3 - Open source

1. [Home](https://www.typo3-solr.com/)
2. [What is Solr](https://www.typo3-solr.com/what-is-solr/)
3. Open Source

  Open Source License
===================

Apache Solr is released under the Apache License, Version 2.0

<http://www.apache.org/licenses/LICENSE-2.0>

The Apache Solr for TYPO3 extension is licensed under the GNU General Public License, Version 2 or later

[http://www.gnu.org/licenses/gpl-2.0.html](https://www.gnu.org/licenses/old-licenses/gpl-2.0.html "Go to the GNU General Public License")