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Free vector databases
22 vector databases tools with a free plan, free tier or free open-source version. Vector Databases tools whose official pricing page shows a free plan or free tier, plus open-source projects. Free plans usually have limits on usage, features or commercial use, so check each one before relying on it.
How to read this page. The tools are grouped by category and are not ranked. Pricing labels come from vendors' own pages when we could confirm them. Always verify plans and limits on the vendor's site.
Vector Databases (22)
| Tool | What it does | Pricing | Link |
|---|---|---|---|
| Algolia | Search and discovery API with AI-powered neural and vector search. | Freemium | Official site |
| Annoy | Open-source library from Spotify for approximate nearest neighbor search. | Free | Official site |
| Chroma | Open-source search and embeddings database for AI applications. | Freemium | Official site |
| FAISS | Meta's open-source library for efficient similarity search over dense vectors. | Free | Official site |
| hnswlib | Open-source header-only C++/Python library for fast approximate nearest neighbor search. | Free | Official site |
| Mixedbread | Search platform and embedding and reranking models for building AI search. | Freemium | Official site |
| Neo4j | Graph database with vector search, used for knowledge graphs and GraphRAG. | Freemium | Official site |
| ParadeDB | Postgres extension and distribution for full-text search and analytics, used alongside vector search. | Free | Official site |
| pgvector | Open-source vector similarity search extension for PostgreSQL. | Free | Official site |
| Ragie | Managed retrieval-augmented generation (RAG) service with connectors, indexing and retrieval APIs. | Freemium | Official site |
| Redis | In-memory data platform with vector search and semantic caching for AI apps. | Freemium | Official site |
| ScaNN | Google open-source library for efficient vector similarity search. | Free | Official site |
| Supabase | Open-source Postgres development platform with vector and AI toolkit. | Freemium | Official site |
| SurrealDB | Multi-model database with vector, graph and document data, positioned as memory for AI agents. | Freemium | Official site |
| TigerData | Postgres cloud from the creators of TimescaleDB, with pgvectorscale for vector workloads. | Freemium | Official site |
| Turso | SQLite-compatible database with native vector search for on-device and edge apps. | Freemium | Official site |
| txtai | Open-source embeddings database for semantic search and LLM workflows. | Free | Official site |
| Upstash Vector | Serverless vector database from Upstash, billed by usage. | Freemium | Official site |
| USearch | Open-source single-file vector search and clustering engine. | Free | Official site |
| Vald | Open-source, cloud-native distributed approximate nearest neighbor vector search engine. | Free | Official site |
| Weaviate | Open-source vector database with hybrid search and a managed cloud. | Freemium | Official site |
| Zilliz | Managed Milvus vector database cloud from its creators. | Freemium | Official site |