Legend:
✅ The tool fulfills most of the requirement
⚠️ The tool partially fulfills the requirement
❌ The tool doesn't fulfill this requirement
➖ The requirement is outside of the scope

Definitions:
SL - Separate License
SP - Separate Product

Sources:
Splunk: Splunk Software License Agreement
Logpoint: Logpoint EULA
Graylog: Graylog End User License Agreement
Elastic: Elastic License

Definitions: