# Product licensing

## Versions 4.12 and newer

Starting with version 4.12, AxoSyslog is licensed under a single, clear open source license: [GNU General Public License version 3 or later (GPL-3.0-or-later)](<https://spdx.org/licenses/GPL-3.0-or-later.html>). For details on what this means, see the [AxoSyslog License Update: Moving to GPL3](<https://axoflow.com/blog/axosyslog-syslog-ng-fork-license-change-gpl3>) blog post.

## Versions 3.2 - 4.11

Between versions 3.2 and 4.11, the AxoSyslog application was licensed under a combined LGPL+GPL license. The core of AxoSyslog was licensed under the GNU Lesser General Public License Version 2.1 license, while the rest of the codebase under the GNU General Public License Version 2 license.

Note Practically, the code stored under the `lib` directory of the source code package is under LGPL, the rest is GPL. 

For details about the LGPL and GPL licenses, see [GNU Lesser General Public License](<https://github.com/axoflow/axosyslog/blob/master/LGPL.txt>) and [GNU General Public License](<https://github.com/axoflow/axosyslog/blob/master/GPL.txt>), respectively.

## Documentation license

The Documentation is licensed separately from AxoSyslog. For details, see [The syslog-ng OSE Documentation License](../../docs/axosyslog-core/documentation-license/index.md).

Last modified June 19, 2025: [Licensing change follow-up (a1ea5e3d)](<https://github.com/axoflow/axosyslog-core-docs/commit/a1ea5e3dedad621ada41f34bacdf491ee7021453>)