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QQdrantQdrant Solutions GmbH · Vector databasesIn-depth entryOpen-source vector search engine written in Rust with filterable HNSW indexes, sparse and multi-vector support, REST/gRPC APIs and a managed cloudApache-2.0Open sourceFreemiumLocalSelf-hostedNov 2, 2026
WWeaviateWeaviate B.V. · Vector databasesOpen-source vector database in Go with pluggable vectorizer modules, hybrid BM25 and vector search, multi-tenancy and a managed cloudBSD-3-ClauseOpen sourceFreemiumSelf-hostedBroken