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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Qdrant
Qdrant Solutions GmbH · Vector databases
Open-source vector search engine written in Rust with filterable HNSW indexes, sparse and multi-vector support, REST/gRPC APIs and a managed cloud
Apache-2.0Open sourceFreemiumLocalSelf-hostedNov 2, 2026
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