compare
Elasticsearch vs OpenSearch
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Elasticsearch | OpenSearch |
|---|---|---|
| Language | Java | Java |
| Licence | Other | Apache-2.0 |
| Stars | 78k | 14k |
| Latest | v9.5.5 | 3.9.0 |
| Last push | 2026-10-06 | 2026-10-06 |
| Release cadence | about 4 days between releases | about 43 days between releases |
| Active contributors | 121+ commit authors on the default branch in the last 90 days | 104 commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
OpenSearch replaces Elasticsearch. Alternatives to Elasticsearch →
Full replacementFork of Elasticsearch 7.10.2, APIs have diverged since.
Both replace Elastic Cloud. Alternatives to Elastic Cloud →
Full replacementElasticsearchThe same Elasticsearch, with Kibana installed alongside, run on your own machines.
Full replacementOpenSearchFork of Elasticsearch 7.10.2 with OpenSearch Dashboards, run on your own machines; APIs have diverged since.
Published benchmarks, each linked to its source. The numbers depend on the hardware and the workload they were measured on.
Elasticsearch 8.7 vs OpenSearch 2.7 on a logging workload
Elasticsearch 40% to 140% faster overall: text queries 76% faster, date histograms 81% faster, range queries 40% faster.
OpenSearch 2.17.1 vs Elasticsearch 8.15.4 on the Big5 and Vectorsearch workloads
Geomean of p90 service time: OpenSearch 1.6x faster on Big5, 11% faster on Vectorsearch. Text queries 2.42x slower. By Trail of Bits for AWS.
Elasticsearch
OpenSearch
- 3.9.02026-09-29Compatible with OpenSearch and OpenSearch Dashboards version 3.9.0
- 3.8.02026-08-05Compatible with OpenSearch and OpenSearch Dashboards version 3.8.0
- 2.19.62026-07-06Compatible with OpenSearch and OpenSearch Dashboards version 2.19.6
- 3.7.02026-06-09Compatible with OpenSearch and OpenSearch Dashboards version 3.7.0
- 3.6.02026-04-07Compatible with OpenSearch and OpenSearch Dashboards version 3.6.0
Elasticsearch
✓ signed The latest release, v9.5.5, carries a signature GitHub verified.
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OpenSearch
✓ signed The latest release, 3.9.0, carries a signature GitHub verified.
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