Elastic has announced that Elasticsearch and Kibana are returning to open source. Initially re-licensed in January 2021 to SSPL and ELv2, Elastic now plans to add AGPL as an option. Existing users won't be affected, and new users can choose the open source AGPL license.
https://alternativeto.net/news/2024/8/elastic-reverts-elasticsearch-and-kibana-to-open-source-with-new-agpl-license-option/