Elk opensource or not

Hi ,

I would like to understand is the elk stack opensource or not.

There are lot tools in the stack it seems what are opensource and what are not?

ELK means Elasticsearch Logstash and Kibana.

Both 3 are open source under Apache 2 License.

We have some plugins that are commercial, ie not free. These are Shield, Marvel and Watcher.

There is also an Elasticsearch-Hadoop connector and a collection of Beats that are all open source under the Apache 2.0 license.