LLlamaIndexLlamaIndex, Inc. · Agent frameworks & orchestrationOpen-source Python framework for retrieval-augmented agents over your data, with connectors, indexes, query engines and event-driven workflows, alongside the commercial LlamaParse document platformMITOpen sourceFreeLocalSelf-hostedNov 2, 2026
MMilvusZilliz / LF AI & Data Foundation · Vector databasesOpen-source vector database from Zilliz with Lite, Standalone and Distributed deployments, many index types and GPU accelerationApache-2.0Open sourceFreeLocalSelf-hostedNov 2, 2026
PpgvectorAndrew Kane (pgvector project) · Vector databasesIn-depth entryPostgreSQL extension adding vector types, distance operators and HNSW/IVFFlat indexes for similarity search inside the databasePostgreSQLOpen sourceFreeSelf-hostedNov 2, 2026