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Five years after the fork, OpenSearch is slowly stepping out of AWS’s shadow

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Five years after the fork, OpenSearch is slowly stepping out of AWS’s shadow

OpenSearch has come a long way since Amazon Web Services first announced the project back in January 2021, in response to Elastic’s decision to move Elasticsearch and its accompanying visualization tool, Kibana, away from Apache 2.0 and onto a combination of proprietary and source-available licenses. Elastic said at the time that the reason was to prevent cloud behemoths such as AWS from offering Elasticsearch “as a service” without giving anything back, while also accusing AWS of violating the Elasticsearch trademark.

While Elastic subsequently returned Elasticsearch and Kibana to open source by adding AGPL as a licensing option, making up with AWS along the way, OpenSearch has continued forging its own path as an independent open source project — albeit one still closely associated with the technology giant that created it.

A major milestone came in September 2024, when AWS transferred OpenSearch to the Linux Foundation, establishing the OpenSearch Software Foundation and placing the project under “vendor-neutral” governance. The move was intended to give other companies greater confidence that they could contribute to OpenSearch without AWS retaining ultimate control over its future.

Two years on, OpenSearch shows signs of gaining traction beyond its original backer. Figures provided to The New Stack by the OpenSearch Software Foundation show that AWS’s share of contribution activities across the project’s repositories has fallen from 91% in its first year to 72% in 2025–26. Meanwhile, Amazon-affiliated engineers accounted for 95% of maintainers in the core OpenSearch repository in April 2022 , compared with 71% today.


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