Open source Vector Database tools

Mem0

Universal memory layer for AI agents — multi-signal retrieval, temporal reasoning, 57k+ GitHub stars

Give your AI apps persistent memory and intelligence

Milvus

High-performance vector database — billion-scale AI similarity search.

Apache-2.0 alternative to Pinecone with HNSW/IVF/DiskANN indexing, GPU acceleration, and distributed architecture. Lite mode for development.

Qdrant

High-performance vector database — semantic search at scale.

Apache-2.0 alternative to Pinecone with HNSW indexing, payload filtering, and distributed deployment. Rust engine with REST/gRPC APIs.

Chroma

Rust-based vector database for AI — serverless cloud with hybrid and full-text search for embeddings, metadata, and RAG

Open-source vector database for AI search and retrieval

Supermemory

Memory layer for AI agents — hybrid vector search, ontology-aware graph, and sub-100ms retrieval

Memory layer for AI agents — hybrid vector search with ontology-aware graph and sub-100ms retrieval. Self-hostable alternative to Pinecone and Mem0.

Weaviate

AI-native vector database with semantic search, RAG, and hybrid search for building AI agents and applications

AI-native vector database for intuitive applications