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Search and vector · GPL v3 (open source) · 27,100 stars

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Open 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

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Project	License	Stars	Per week	Latest release
ElasticsearchFree and Open Source, Distributed, RESTful Search Engine.ElasticAGPL v3 or SSPL or ELv2	AGPL v3 or SSPL or ELv2changed Sep 2024	78.5k	+80	v9.5.4Sep 15, 2026
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 parts	MIT for most code, Business Source License 1.1 for Enterprise Edition partschanged Jul 2025	59.8k	+58	-
MilvusMilvus is a high-performance, cloud-native vector database built for scalable vector ANN search.LF AI & DataApache 2.0	Apache 2.0	46.6k	+51	v3.0.2Sep 20, 2026
QdrantQdrant - High-performance, massive-scale Vector Database and Vector Search Engine for the next generation of AI.QdrantApache 2.0	Apache 2.0	35.4k	+105	v1.19.1Sep 4, 2026
chromaSearch infrastructure for AI.Apache 2.0	Apache 2.0	29.7k	+47	-
pgvectorOpen-source vector similarity search for Postgres.Custom or mixed (see the LICENSE file)	Custom or mixed (see the LICENSE file)	23.6k	+70	-
sonicFast, lightweight & schema-less search backend.MPL 2.0	MPL 2.0	21.4k	+5	-
WeaviateWeaviate is an open-source vector database that stores both objects and vectors, allowing for the combination of vector search with structured filtering with the fault tolerance and scalability of a cloud-native database.WeaviateBSD-3-Clause outside the wl directory, Weaviate License inside it	BSD-3-Clause outside the wl directory, Weaviate License inside itchanged Aug 2026	16.9k	+14	-