Is ELK (Elasticsearch, Logstash and Kibana) version 5.4.3 open source or not ?
Hi,
A simple search on google or github should have answered that question 
- elasticsearch : https://github.com/elastic/elasticsearch/tree/v5.4.3
- logstash : https://github.com/elastic/logstash/tree/v5.4.3
- kibana : https://github.com/elastic/kibana/tree/v5.4.3
Best regards,
Charles Casadei.
All versions of Elasticsearch, Logstash, and Kibana are open source under the apache2 license, and as the previous commenter mentioned, you can access the source code on github.