elasticsearch/docs/reference/setup/install/license.asciidoc

This package is free to use under the Elastic license. It contains open source 
and free commercial features and access to paid commercial features.  
{kibana-ref}/managing-licenses.html[Start a 30-day trial] to try out all of the 
paid commercial features. See the 
https://www.elastic.co/subscriptions[Subscriptions] page for information about 
Elastic license levels.