OpenSearch
AWS-led fork of Elasticsearch 7 — Apache-licensed; k-NN plugin, OpenSearch ML, neural-search. Substrate beneath AWS OpenSearch Service.
Active · Verified 2026-10-26 · fresh as of 2026-10-26 · 18 cited facts, 1 with a third-party source · 2 recorded changes · Suggest a correction
At a glance
- Type
- Open Elasticsearch fork vendor fix
- Tier
- T1
- Section
- Search platforms (non-memory)
- Latest release
- searched not found fix
- License
- Apache-2.0 vendor fix
- Funding
- searched not found fix
- Freshness
- 2026-10-26 fix
- Layer
- model-infra repo fix
- Licensing
- open-source vendor fix
- SDK languages
- csharp, go, java, php, python, rest, ruby, rust, typescript vendor fix
- Protocols
- mcp-server repo fix
- Developer activity
- OpenRank 54.29 (12-mo avg 63.48) · 154 participants — 2026-09 third-party fix
When to use
Optimised for: searched not found
Anti-fit: searched not found
Pros & cons
Pros
searched not found
Cons
searched not found
Claims & capabilities
LF AI graduate; large enterprise deployment via AWS.
Technical surface
- API surface
- searched not found
- Backend storage
- searched not found
- Deployment
- searched not found
- Embedding model
- searched not found
- Multi-tenancy
- searched not found
- MCP
- yes — official opensearch-project/opensearch-mcp-server-py (Apache-2.0)
- A2A
- searched not found
- OpenTelemetry
- searched not found
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Open-source search engine focused on typo-tolerance and ease of use — Typesense Cloud commercial; rising Algolia alternative.
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- Sajari (now Search.io) T3
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- Tantivy T2
Rust port of Lucene — embedded full-text search engine. Underlies Quickwit, Lnx, Bayard. Used in Meilisearch and many in-process search engines.
Sources (17 cited facts, 1 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Open Elasticsearch fork vendor
- What it does & what's distinct AWS-led fork of Elasticsearch 7 — Apache-licensed; k-NN plugin, OpenSearch ML, neural-se… vendor
- Claims / benefits LF AI graduate; large enterprise deployment via AWS. vendor
- Created 2021 vendor
- License Apache-2.0 vendor
- GitHub opensearch-project/OpenSearch — ~13.7k stars, active (commit date not captured) repo
- Pricing free (OSS); Amazon OpenSearch Service billed separately by AWS repo
- Founders / pedigree Forked from Elasticsearch 7.10 by Amazon in 2021-04 (response to Elastic license change … vendor
- Code/weights release Active — last commit 2026-05 · 12,914★ repo
- MCP support yes — official opensearch-project/opensearch-mcp-server-py (Apache-2.0) repo
- architecture-deployment-locus local vendor
- licensing-bucket open-source vendor
- positioning-platform-vs-product platform vendor
- taxonomy-three-layer-rollup model-infra repo
- developer-activity-opendigger {"activity":412.19,"as_of":"2026-09","openrank_12mo":63.48,"openrank_current":54.29,"par… third-party
- sdk-languages csharp,go,java,php,python,rest,ruby,rust,typescript vendor
- protocol-support mcp-server repo
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
Related systems
References (1)
- Elasticsearch forks — AWS-led fork of Elasticsearch 7 — Apache-licensed
Referenced by (8)
- Bedrock AgentCore (AWS) depends on at runtime — backend-storage cell: AWS-managed (DynamoDB, S3, OpenSearch under the hood)
- Haystack (framework) integrates with — Haystack integrations directory has an OpenSearch integration page ("A Document Store for storing and retrieval from OpenSearch"). (verified 2026-10-29)
- LlamaIndex (framework) integrates with — LlamaIndex has an official vector store integration package llama-index-vector-stores-opensearch in its repo. (verified 2026-10-29)
- Mastra integrates with — Mastra repo ships the @mastra/opensearch vector store package. (verified 2026-10-29)
- Mem0 integrates with — Mem0 docs have an OpenSearch vector store page for Mem0 open source. (verified 2026-10-29)
- Phidata (now Agno) integrates with — Agno ships a opensearch vector DB integration module (agno.vectordb.opensearch). (verified 2026-10-29)
- Strands Agents Memory (AWS) builds on — OpenSearch for production
- Zep & Graphiti integrates with — Graphiti README says the Neptune backend uses an Amazon OpenSearch Serverless collection for full-text search. (verified 2026-10-29)