# Elasticsearch vs OpenSearch

| Attribute | Elasticsearch | OpenSearch |
|---|---|---|
| **Vioscale score** | 60 (50% (medium)) | 60.6 (50% (medium)) |
| activity.commits_last_30d | 100 | 85 |
| adoption.dependent_repos | 18,551 | 223 |
| adoption.github_stars | 77,862 | 13,581 |
| deployment.options | `{"cloud":true,"on_prem":true,"air_gapped":true,"self_hosted":true}` | `{"on_prem":true,"self_hosted":true}` |
| description.long | A search and analytics platform that ingests, stores, and searches structured, unstructured, and vector data in real time. Supports full-text search, vector search, observability analytics, and security event analysis through a unified REST API and query language. | An open-source search and observability suite that enables enterprises to search, analyze, and monitor unstructured data. It combines full-text search, machine learning, real-time log analysis, and security analytics capabilities in an integrated platform. |
| features.capabilities | `{"faceting":"yes","query_dsl":"ES|QL","deployment":"self_hosted","geo_search":true,"distributed":"sharded","index_engine":"lucene","licence_class":"source_available","log_analytics":true,"multi_tenancy":true,"vector_search":"hybrid_fusion","typo_tolerance":"built_in","relevance_tuning":"ltr","realtime_indexing":"near_real_time"}` | `{"deployment":"self_hosted","geo_search":false,"distributed":"sharded","licence_class":"source_available","log_analytics":true,"multi_tenancy":true,"vector_search":"hybrid_fusion","relevance_tuning":"bm25_only","realtime_indexing":"near_real_time"}` |
| integrations.count | 25 | 1 |
| integrations.list | `[{"name":"Slack"},{"name":"Jira"},{"name":"ServiceNow"},{"name":"PagerDuty"},{"name":"Microsoft Teams"},{"name":"IBM Resilient"},{"name":"xMatters"},{"name":"GitHub"},{"name":"Jina AI"},{"name":"NVIDIA AI"},{"name":"Prometheus"},{"name":"Grafana"},{"name":"AWS Bedrock"},{"name":"Sarvam AI"},{"name":"Google ADK"},{"name":"LlamaParse"},{"name":"Mistral"},{"name":"Elastic Agent"},{"name":"Beats"},{"name":"Logstash"},{"name":"Filebeat"},{"name":"Metricbeat"},{"name":"Heartbeat"},{"name":"Webhooks"},{"name":"S3"}]` | `[{"name":"Data Prepper"}]` |
| language.primary | Java | Java |
| license.spdx | - | Apache-2.0 |
| market.availability | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"cli":true,"web":true}` | `{"cli":true,"web":true}` |
| pricing | `{"type":"free|open_source|quote","plans":[{"free":true,"name":"Free and Open","features":["Distributed vector and search engine","Full-text, semantic, and vector search","Kibana interface for querying and visualization","Native authentication and TLS encryption","Basic monitoring via Stack Monitoring","Data ingestion via Logstash, Beats, Elastic Agent","Out-of-the-box threat detection with alerting","APM, logging, metrics collection"],"description":"Full Elasticsearch Stack with core search, analytics, and basic security. Self-hosted or via Elastic Cloud.","contactSales":false},{"free":false,"name":"Platinum","features":["Everything in Free plus:","Single sign-on (SSO), LDAP/Active Directory","Field and document-level security","Audit logging","Machine learning anomaly detection","ELSER semantic search models","Cross-cluster replication for high availability","Automated threat discovery","24/7/365 support with 1-hour critical SLA"],"description":"Advanced security, machine learning, and high availability capabilities","contactSales":true},{"free":false,"name":"Enterprise","features":["Everything in Platinum plus:","Searchable snapshots on low-cost object storage (up to 80% cost reduction)","Attack Discovery (GenAI security)","Universal Profiling for application performance","Cross-cluster search with advanced API-key security","Elastic Agent Builder for RAG and search development","Jina AI and third-party LLM integration","Semantic reranking and Learn-to-Rank personalization","DiskBBQ vector indexing optimization","Elastic Workflows for automated incident response","Endpoint and cloud workload protection"],"description":"Maximum capabilities including AI orchestration, advanced security, and infrastructure optimization","contactSales":true}],"summary":"Free open-source tier; Platinum and Enterprise tiers available on request","currency":"USD","freeTier":true,"sourceUrl":"https://www.elastic.co/pricing/self-managed","retrievedAt":"2026-08-14T21:53:02.120Z","freeTrialDays":14}` | `{"type":"open_source","summary":"Open source and free to use","freeTier":true,"sourceUrl":"https://opensearch.org","retrievedAt":"2026-08-14T16:38:44.075Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | commercial |
| pricing.price_level | low | free |
| pricing.transparent | no | yes |
| release.cadence_days | - | 29 |
| release.history | `[{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.5.2","date":"2026-08-20T16:44:04Z","type":"stable","version":"v9.5.2"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.5.1","date":"2026-08-11T17:58:01Z","type":"stable","version":"v9.5.1"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.4.5","date":"2026-08-11T17:57:54Z","type":"stable","version":"v9.4.5"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v8.19.20","date":"2026-08-11T18:24:43Z","type":"stable","version":"v8.19.20"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.5.0","date":"2026-08-04T11:46:37Z","type":"stable","version":"v9.5.0"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.4.4","date":"2026-07-21T12:56:20Z","type":"stable","version":"v9.4.4"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.3.8","date":"2026-07-21T12:56:46Z","type":"stable","version":"v9.3.8"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v8.19.19","date":"2026-07-21T13:28:17Z","type":"stable","version":"v8.19.19"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v8.19.18","date":"2026-06-30T16:43:41Z","type":"stable","version":"v8.19.18"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.3.7","date":"2026-06-30T16:47:02Z","type":"stable","version":"v9.3.7"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.4.3","date":"2026-06-30T14:30:13Z","type":"stable","version":"v9.4.3"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v8.19.17","date":"2026-06-23T13:59:04Z","type":"stable","version":"v8.19.17"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.3.6","date":"2026-06-23T14:09:56Z","type":"stable","version":"v9.3.6"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.4.2","date":"2026-05-28T14:59:44Z","type":"stable","version":"v9.4.2"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.3.5","date":"2026-05-28T14:59:30Z","type":"stable","version":"v9.3.5"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v8.19.16","date":"2026-05-28T14:59:08Z","type":"stable","version":"v8.19.16"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.4.1","date":"2026-05-12T18:02:29Z","type":"stable","version":"v9.4.1"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.4.0","date":"2026-05-05T15:15:40Z","type":"stable","version":"v9.4.0"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v8.19.15","date":"2026-04-30T15:24:27Z","type":"stable","version":"v8.19.15"},{"url":"https://github.com/elastic/elasticsearch/releases/tag/v9.3.4","date":"2026-04-30T15:24:33Z","type":"stable","version":"v9.3.4"}]` | `[{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.8.0","date":"2026-08-05T17:20:33Z","type":"stable","version":"3.8.0"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/2.19.6","date":"2026-07-06T18:22:45Z","type":"stable","version":"2.19.6"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.7.0","date":"2026-06-09T23:41:20Z","type":"stable","version":"3.7.0"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.6.0","date":"2026-04-07T22:06:23Z","type":"stable","version":"3.6.0"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/2.19.5","date":"2026-05-13T17:52:18Z","type":"stable","version":"2.19.5"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.5.0","date":"2026-02-12T15:40:44Z","type":"stable","version":"3.5.0"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.4.0","date":"2025-12-17T07:57:13Z","type":"stable","version":"3.4.0"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/2.19.4","date":"2025-11-06T21:45:44Z","type":"stable","version":"2.19.4"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.3.2","date":"2025-10-30T20:34:44Z","type":"stable","version":"3.3.2"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.3.1","date":"2025-10-22T18:32:00Z","type":"stable","version":"3.3.1"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.3.0","date":"2025-10-14T21:22:10Z","type":"stable","version":"3.3.0"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.2.0","date":"2025-08-19T23:45:42Z","type":"stable","version":"3.2.0"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/2.19.3","date":"2025-08-21T21:09:15Z","type":"stable","version":"2.19.3"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.1.0","date":"2025-06-24T22:18:26Z","type":"stable","version":"3.1.0"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.0.0","date":"2025-05-06T21:58:50Z","type":"stable","version":"3.0.0"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.0.0-beta1","date":"2025-04-23T00:16:18Z","type":"stable","version":"3.0.0-beta1"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/2.19.2","date":"2025-08-21T21:11:35Z","type":"stable","version":"2.19.2"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/3.0.0-alpha1","date":"2025-03-18T22:31:54Z","type":"stable","version":"3.0.0-alpha1"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/2.19.1","date":"2025-02-27T23:31:01Z","type":"stable","version":"2.19.1"},{"url":"https://github.com/opensearch-project/OpenSearch/releases/tag/1.3.20","date":"2024-12-11T23:23:59Z","type":"stable","version":"1.3.20"}]` |
| reliability.status_page | yes | - |
| security.disclosure_policy | - | yes |
| security.scorecard | 6.9 | - |
| security.vulnerabilities | `{"count":45,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.elasticsearch%3Aelasticsearch&per_page=100","last_12m":2,"max_severity":"HIGH"}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=org.opensearch.client%3Aopensearch-rest-high-level-client&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Search Engines)

| Capability | Elasticsearch | OpenSearch |
|---|:--:|:--:|
| **Deployment** |  |  |
| Deployment | Self-hosted | Self-hosted |
| **Architecture** |  |  |
| Index engine | Lucene | - |
| **Query** |  |  |
| Query DSL (JSON / SQL / params / GraphQL) | ES|QL | - |
| Faceting & filtering | Yes | - |
| Geo search | ✓ | ✗ |
| **Relevance** |  |  |
| Typo tolerance / fuzzy | Built-in | - |
| Relevance tuning | Learning-to-rank | BM25 only |
| **Vector** |  |  |
| Vector / hybrid search | Dense + lexical fusion | Dense + lexical fusion |
| **Scale** |  |  |
| Distributed / horizontal scale | Sharded | Sharded |
| Multi-tenancy (indexes / collections / tenants) | ✓ | ✓ |
| **Ingest** |  |  |
| Real-time indexing | Near-real-time | Near-real-time |
| **Workload** |  |  |
| Log / analytics workload | ✓ | ✓ |
| **Licensing** |  |  |
| Licence class | Source-available (SSPL / Elastic) | Source-available (SSPL / Elastic) |

*Source: Vioscale. Generated 2026-09-01T17:13:41.975Z. "-" = undocumented, not absent.*