Who makes the most used vector database?

1. Pinecone — Pinecone, founded by Edo Liberty, is currently the leading commercial vector database vendor by business adoption, according to Ramp's November 2, 2026 data.
2. turbopuffer — Turbopuffer: 2, with 38%.
3. Qdrant — Qdrant: 3, with 11%.
4. Weaviate — Weaviate: 4, with 10%.
5. Faiss — FAISS, pgvector, ChromaDB and Qdrant are major players.
6. PostgreSQL — FAISS, pgvector, ChromaDB and Qdrant are major players.
7. Chroma — FAISS, pgvector, ChromaDB and Qdrant are major players.

1. Pinecone — Pinecone appears to be the most-used dedicated vector-database vendor in the U.S.
2. PostgreSQL — Vector search overall: PostgreSQL with the pgvector extension may have broader deployment because it adds vector search to an already widespread database.

Determining the "most used" vector database depends on whether you look at fully managed cloud services or open-source/self-hosted GitHub popularity , as well as multi-model search giants. The prominent leaders in the space are categorized below by their primary market footprint and makers: Leading Dedicated Vector Databases Database / Project Maker / Company Core Positioning & Usage --------- Pinecone Pinecone Systems Widely cited in developer ecosystem surveys (such as Retool and Streamlit)…

1. Pinecone
2. Qdrant
3. Weaviate
4. Chroma
5. Elasticsearch — If counting incumbent search engines and document stores that added heavy vector capabilities, Elasticsearch (by Elastic ) and OpenSearch technically rank highest on general database popularity metrics (like DB-Engines)…
6. OpenSearch — If counting incumbent search engines and document stores that added heavy vector capabilities, Elasticsearch (by Elastic ) and OpenSearch technically rank highest on general database popularity metrics (like DB-Engines)…