ElasticSearch vs OpenSearch
Both ElasticSearch and OpenSearch are self-hosted alternatives to Algolia. Both are filed under Search Engines.
Side by side
| Field | ElasticSearch | OpenSearch |
|---|---|---|
| Description | Distributed, RESTful search and analytics engine. | Distributed and RESTful search engine. |
| GitHub stars | 78,455 | 13,947 |
| License | SSPL-1.0 | Apache-2.0 |
| Platforms | Java | Java, Docker, K8S, deb |
| Latest release | v9.5.5, 6 October 2026 | 2.19.7, 20 October 2026 |
| Repository activity | 1 November 2026 | 1 November 2026 |
| Health | Active | Active |
| Categories | Search Engines | Search Engines |
| Website | https://www.elastic.co/elasticsearch/ | https://opensearch.org |
| Source code | https://github.com/elastic/elasticsearch | https://github.com/opensearch-project/OpenSearch |
Where the records differ
Computed from the two records above: a line appears only where the dataset states a figure, a date or a set relation, and no line recommends one application over the other.
- ElasticSearch has more GitHub stars in the dataset, 78,455 against 13,947.
- Both repositories last recorded activity on 1 November 2026.
- OpenSearch has the newer release on record: 2.19.7, 20 October 2026, against v9.5.5, 6 October 2026.
- Licenses differ: ElasticSearch is listed under SSPL-1.0; OpenSearch under Apache-2.0.
- Platforms differ: ElasticSearch lists Java; OpenSearch lists Java, Docker, K8S, deb.
- Both are filed under the same categories: Search Engines.