Open source

For Matomo, the “free” in “free software” is used primarily in reference to freedom and not to price – although Matomo core is available free of charge. 

The most important thing about Matomo is that it confers rights of software freedom on the people who install and use it. It is those freedoms that enable the Matomo community to grow; to share a collective experience; and to contribute their expertise to improve Matomo.