OpenSearch
A powerful search and analytics engine built on Apache Lucene
- Also known as
- opensearch
What is OpenSearch?
OpenSearch is an open-source search and analytics engine built on Apache Lucene, offering capabilities for enterprise search, vector search, observability, and security analytics.
What OpenSearch does
The capabilities that matter for search engines, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Deployment
- Self-hosted
- Index engine
- Lucene
- Query DSL (JSON / SQL / params / GraphQL)
- -
- Faceting & filtering
- -
- Geo search
- -
- Typo tolerance / fuzzy
- -
- Relevance tuning
- -
- Vector / hybrid search
- Dense + lexical fusion
- Distributed / horizontal scale
- -
- Multi-tenancy (indexes / collections / tenants)
- -
- Real-time indexing
- -
- Log / analytics workload
- ✓
- Licence class
- Permissive OSS
Platform & deployment
Independently observed- Self-hosted
OpenSearch alternatives
Other search engines we track, ranked by the same independent score.
- VespaAI Search at Scalelow · 23%
- VespaAI Search at Scalelow · 26%
- MeilisearchOne platform to build, scale, and unify search and AI retrievallow · 46%
- BleveModern indexing & search for Golow · 15%
- Manticore Searcheasy-to-use fast search databaselow · 37%
- TypesenseLightning Fast, Open Source Searchlow · 35%
The Vioscale score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for OpenSearch, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Github Activity | 60 | 20.00 | 1201.7 | ✓ |
| Release Cadence | 81 | 12.00 | 966.7 | ✓ |
| Github Stars | 78 | 7.00 | 545.1 | ✓ |
| Capabilities | 29 | 17.00 | 491.4 | ✓ |
| Price Level | 0 | 6.00 | 0.0 | - |
| Reliability | 0 | 10.00 | 0.0 | - |
| Integrations | 0 | 8.00 | 0.0 | - |
| Security Posture | 0 | 18.00 | 0.0 | - |
| Package Downloads | 0 | 6.00 | 0.0 | - |
| Pricing Transparency | 0 | 8.00 | 0.0 | - |
| Stackoverflow Activity | 0 | 20.00 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 80 | mediumsource · 2026-08-01 · 65% |
Adoption
| Attribute | Value | Evidence |
|---|---|---|
| Github stars | 13,427 | highsource · 2026-08-01 · 90% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | {"deployment":"self_hosted","index_engine":"lucene","licence_class":"permissive_oss","log_analytics":true,"vector_search":"hybrid_fusion"} | mediumsource · 2026-08-01 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | Java | highsource · 2026-08-01 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | Apache-2.0 | highsource · 2026-08-01 · 95% |
Pricing
| Attribute | Value | Evidence |
|---|---|---|
| Model | commercial | lowsource · 2026-08-01 · 40% |
Release
| Attribute | Value | Evidence |
|---|---|---|
| Cadence days | 35 | mediumsource · 2026-08-01 · 70% |