Open source for data and AI

Projects748Relicensed100

748 projects · 100 relicensed

OpenSearch license, foundation and stars

Search and vector · Apache 2.0 (open source) · OpenSearch Software Foundation · backed by AWS · 13,952 stars

GitHub

Open source distributed and RESTful search engine.

License history

LICENSE file

Apache 2.0 No license change recorded since the repository was created in 2021.

Where it came from

ProjectWhat
ElasticsearchApr 12, 2021: Forked from Elasticsearch 7.10.2. Source

Latest release

3.8.0 published Aug 5, 2026

More in search and vector

AGPL v3 or SSPL or ELv278.4k starsElasticsearchFree and Open Source, Distributed, RESTful Search Engine.Elastic · +89 a week · v9.5.4, Sep 15, 2026 · relicensed Sep 2024MIT for most code, Business Source License 1.1 for Enterprise Edition parts59.8k starsMeilisearchA lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications.Meilisearch · +58 a week · relicensed Jul 2025Apache 2.046.6k starsMilvusMilvus is a high-performance, cloud-native vector database built for scalable vector ANN search.LF AI & Data · +51 a week · v3.0.2, Sep 20, 2026Apache 2.035.4k starsQdrantQdrant - High-performance, massive-scale Vector Database and Vector Search Engine for the next generation of AI.Qdrant · +105 a week · v1.19.1, Sep 4, 2026Apache 2.029.7k starschromaSearch infrastructure for AI.+47 a weekGPL v327.1k starstypesenseOpen Source alternative to Algolia + Pinecone and an Easier-to-Use alternative to ElasticSearch Fast, typo tolerant, in-memory fuzzy Search Engine for building delightful search experiences.+85 a weekCustom or mixed (see the LICENSE file)23.6k starspgvectorOpen-source vector similarity search for Postgres.+70 a weekMPL 2.021.4k starssonicFast, lightweight & schema-less search backend.+5 a week
ProjectStars
ElasticsearchFree and Open Source, Distributed, RESTful Search Engine.ElasticAGPL v3 or SSPL or ELv278.4k
MeilisearchA lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications.MeilisearchMIT for most code, Business Source License 1.1 for Enterprise Edition parts59.8k
MilvusMilvus is a high-performance, cloud-native vector database built for scalable vector ANN search.LF AI & DataApache 2.046.6k
QdrantQdrant - High-performance, massive-scale Vector Database and Vector Search Engine for the next generation of AI.QdrantApache 2.035.4k
chromaSearch infrastructure for AI.Apache 2.029.7k
typesenseOpen Source alternative to Algolia + Pinecone and an Easier-to-Use alternative to ElasticSearch Fast, typo tolerant, in-memory fuzzy Search Engine for building delightful search experiences.GPL v327.1k
pgvectorOpen-source vector similarity search for Postgres.Custom or mixed (see the LICENSE file)23.6k
sonicFast, lightweight & schema-less search backend.MPL 2.021.4k
About and history
Repository
opensearch-project/OpenSearch · created Jan 29, 2021
Website
opensearch.org/docs/latest/opensearch/index
Language
Java
Foundation
OpenSearch Software Foundation since Sep 16, 2024 · source
Company
AWS · on Companies · on Acquisitions · on awards · on awards · on awards · on awards · on blogs · on certifications · on Attested · on Tier Zero · on Downtime · on Mainstage · on Mainstage · on Mainstage · on Leaders · on marketplaces · on papers · on Allied · on Paydays · on Metered · on Metered · on quotes · on Footprint · on Footprint · on Releases · on Nines · on Stories · on TechConf · on training · on Hotlist
GitHub detects
Apache-2.0
Stars per week
30 (GitHub weekly snapshots)

Weekly snapshots

Week ofStars
Nov 2, 202613,952
Oct 19, 202613,903
Oct 12, 202613,877
Oct 5, 202613,821
Sep 21, 202613,775

Changes

Stars per weekNov 3, 2026

Gains about 30 stars a week, down from 32.

Stars per weekOct 24, 2026

Gains about 32 stars a week, down from 34.

Stars per weekOct 16, 2026

Gains about 34 stars a week, up from 23.

Stars per weekOct 8, 2026

Gains about 23 stars a week, down from 41.

TrackedSep 24, 2026

Now tracked, from opensearch-project/OpenSearch on GitHub.