Free OSS; Cloud usage-based Chroma
Dedicated
A developer-friendly vector database for local retrieval, with managed Cloud search and ingestion options.
Vector databases
Stores and searches embeddings for retrieval, recommendations and semantic search.
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Free OSS; Cloud usage-based 
Free OSS LanceDB
Dedicated
An embedded vector database for developers building AI search, with hybrid retrieval, versioned tables, and source data stored alongside embeddings.
Usage-based; monthly minimum Turbopuffer
Dedicated
Search database built on object storage, combining vector and keyword retrieval with native embeddings, metadata filters, and optional reserved resources.
Vespa
Search engine
Search and vector engine for hybrid retrieval, recommendations, and custom phased ranking. Available self-hosted or through Vespa Cloud.
Free Basic / usage-based cloud Elasticsearch
Search engine
Search and analytics engine combining keyword, vector, and hybrid retrieval with document exploration and log analytics. Available self-managed, Hosted, or Serverless.
Free software; usage-based Cloud ClickHouse
Extension
Open-source columnar SQL database for real-time analytics, with managed Cloud deployment, ClickPipes ingestion, and workload-specific scaling.
Milvus
Dedicated
Open-source, billion-scale vector database under LF AI & Data; 3.0 indexes lakehouse data in place, with DiskANN and GPU CAGRA indexes.
Zilliz Cloud
Dedicated
Fully managed Milvus from its commercial steward, with AutoIndex tuning, the Cardinal engine, and post-2026 storage pricing at $0.04/GB/month.
Qdrant
Dedicated
Open-source Rust vector database with in-graph payload filtering, three quantization families, and a free forever cloud tier.
Weaviate
Dedicated
Open-source vector database with native BM25 + vector hybrid search, per-tenant shard isolation, and multimodal vectorizer modules.
Pinecone
Dedicated
Fully managed serverless vector database with zero-ops scaling, deep RAG framework integrations, and enterprise compliance.