LicenseΒΆ
Security Onion is a free and open platform. The vast majority of software included in Security Onion is licensed under OSI-approved open source licenses. However, starting in Elastic 7.11, the Elastic Stack is licensed under the Elastic License. During installation, you will be prompted to accept the Elastic License:

Note
You can find the full text of the Elastic License at:
For more information about the Elastic license change, please see: