Hi Smit,
Wazuh is completely free open source, meaning that you don't have to pay anything for the software. You also have access to our documentation, and free open source community support via Slack and this mailing list:
In addition, if you are interested in professional services (such as assistance with the deployment, support or training) or in using Wazuh SaaS (same open source software but Wazuh provides the infrastructure and the software as a service), you can contact us here:
Best regards,
Santiago.