I had a developer license to work with splunk.i was unable to implement by the splunk SIEM. why ??
how to implement the splunk security and using developer license
and open source is avaliable that one .
disclaimer, i do not work for splunk and therefore my answer might not be 100% / complete
In order to use a premium app, you have to purchase it. that includes ES, ITSI and maybe some others.
you will see a note "contact sales" when you are trying to download the app.
contact Splunk sales with your request