Chroma
Chroma · Vector databases
Open-source embedding database with a minimal Python and JavaScript API, usable in-process, as a server or through Chroma Cloud
Apache-2.0Open sourceUsage-basedLocalSelf-hostedNov 2, 2026
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Milvus
Zilliz / LF AI & Data Foundation · Vector databases
Open-source vector database from Zilliz with Lite, Standalone and Distributed deployments, many index types and GPU acceleration
Apache-2.0Open sourceFreeLocalSelf-hostedNov 2, 2026
pgvector
Andrew Kane (pgvector project) · Vector databases
PostgreSQL extension adding vector types, distance operators and HNSW/IVFFlat indexes for similarity search inside the database
PostgreSQLOpen sourceFreeSelf-hostedNov 2, 2026
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