Tools/OpenSearch
OpenSearch
Apache 2.0-licensed fork of Elasticsearch 7.10.2, created by AWS in 2021 after Elastic relicensed off Apache 2.0; governance moved to the Linux Foundation's OpenSearch Software Foundation in 2024. Same core job as Elasticsearch — distributed search, log analytics, and (increasingly) vector/k-NN search — but truly open-source, which makes it the natural drop-in when phasing out Elasticsearch for licensing or cost reasons.