What AI assistants recommend when buyers ask about self-hosted vector databases — measured weekly across engines, published as open data.
Sample: 49 AI answers · Window: May 21, 2026 – Jun 18, 2026 (4-week rolling)
| # | Product | Share | Trend | Engines | |
|---|---|---|---|---|---|
| 1 | Weaviate weaviate.io | 87.8% avg pos 6.5 | — | GEMINI 100%CHATGPT 85.7%CLAUDE 78.6%PERPLEXITY 92.9% | Claim |
| 2 | Milvus milvus.io | 75.5% avg pos 4.5 | — | GEMINI 100%CHATGPT 85.7%CLAUDE 71.4%PERPLEXITY 57.1% | Claim |
| 3 | Qdrant qdrant.tech | 63.3% avg pos 5 | — | GEMINI 57.1%CHATGPT 21.4%CLAUDE 85.7%PERPLEXITY 85.7% | Claim |
| 4 | pgvector | 38.8% avg pos 5.1 | — | GEMINI 71.4%CLAUDE 57.1%PERPLEXITY 42.9% | Claim |
| 5 | FAISS | 34.7% avg pos 6.4 | — | GEMINI 28.6%CHATGPT 35.7%CLAUDE 42.9%PERPLEXITY 28.6% | Claim |
| 6 | Chroma trychroma.com | 34.7% avg pos 6.5 | — | GEMINI 71.4%CHATGPT 28.6%CLAUDE 42.9%PERPLEXITY 14.3% | Claim |
| 7 | Pinecone pinecone.io | 30.6% avg pos 11.3 | — | CHATGPT 78.6%CLAUDE 21.4%PERPLEXITY 7.1% | Claim |
| 8 | Redis redis.io | 30.6% avg pos 11.9 | — | GEMINI 57.1%CHATGPT 21.4%CLAUDE 50%PERPLEXITY 7.1% | Claim |
| 9 | OpenSearch | 16.3% avg pos 5.8 | — | GEMINI 28.6%CLAUDE 28.6%PERPLEXITY 14.3% | Claim |
| 10 | Vespa vespa.ai | 16.3% avg pos 10 | — | GEMINI 14.3%CHATGPT 14.3%CLAUDE 28.6%PERPLEXITY 7.1% | Claim |
| 11 | Zilliz zilliz.com | 16.3% avg pos 11.8 | — | CHATGPT 21.4%CLAUDE 28.6%PERPLEXITY 7.1% | Claim |
| 12 | GitHub Releases github.com | 16.3% avg pos 11.9 | — | GEMINI 28.6%CHATGPT 35.7%PERPLEXITY 7.1% | Claim |
| 13 | Qdrant Cloud qdrant.io | 14.3% avg pos 1.6 | — | GEMINI 42.9%CHATGPT 7.1%CLAUDE 14.3%PERPLEXITY 7.1% | Claim |
| 14 | PostgreSQL | 12.2% avg pos 6.5 | — | GEMINI 28.6%CLAUDE 14.3%PERPLEXITY 14.3% | Claim |
| 15 | Apache Cassandra | 10.2% avg pos 8 | — | GEMINI 14.3%CLAUDE 28.6% | Claim |
| 16 | Annoy | 8.2% avg pos 10.5 | — | CHATGPT 28.6% | Claim |
| 17 | Elasticsearch elastic.co | 6.1% avg pos 12.3 | — | GEMINI 28.6%PERPLEXITY 7.1% | Claim |
| 18 | Apigee cloud.google.com | 6.1% avg pos 23 | — | CHATGPT 7.1%CLAUDE 14.3% | Claim |
| 19 | Facebook facebook.com | 4.1% avg pos 1 | — | CHATGPT 14.3% | Claim |
| 20 | Kubernetes | 4.1% avg pos 2 | — | CLAUDE 14.3% | Claim |
| 21 | TiDB Vector Search pingcap.com | 4.1% avg pos 4 | — | PERPLEXITY 14.3% | Claim |
| 22 | Postgres | 4.1% avg pos 5.5 | — | CLAUDE 7.1%PERPLEXITY 7.1% | Claim |
| 23 | MongoDB | 4.1% avg pos 8 | — | GEMINI 14.3%CLAUDE 7.1% | Claim |
| 24 | Vald | 4.1% avg pos 16 | — | GEMINI 14.3%CHATGPT 7.1% | Claim |
| 25 | LangChain langchain.com | 4.1% avg pos 17 | — | GEMINI 14.3%PERPLEXITY 7.1% | Claim |
| 26 | LlamaIndex llamaindex.ai | 4.1% avg pos 17 | — | GEMINI 14.3%PERPLEXITY 7.1% | Claim |
| 27 | LanceDB lancedb.com | 4.1% avg pos 17.5 | — | GEMINI 14.3%PERPLEXITY 7.1% | Claim |
| 28 | AWS SNS aws.amazon.com | 4.1% avg pos 23 | — | CHATGPT 7.1%CLAUDE 7.1% | Claim |
| 29 | ChromaDB | 4.1% | — | CLAUDE 14.3% | Claim |
| 30 | SemaDB semafind.com | 4.1% | — | CHATGPT 14.3% | Claim |
| 31 | Zilliz Cloud | 2% avg pos 1 | — | PERPLEXITY 7.1% | Claim |
| 32 | Docker docker.com | 2% avg pos 2 | — | CLAUDE 7.1% | Claim |
| 33 | MyScaleDB | 2% avg pos 2 | — | CLAUDE 7.1% | Claim |
| 34 | ScyllaDB scylladb.com | 2% avg pos 5 | — | GEMINI 14.3% | Claim |
| 35 | Redis-Search | 2% avg pos 6 | — | GEMINI 14.3% | Claim |
| 36 | Redis-VSS | 2% avg pos 6 | — | GEMINI 14.3% | Claim |
| 37 | YugabyteDB yugabyte.com | 2% avg pos 6 | — | GEMINI 14.3% | Claim |
| 38 | GraphQL graphql.org | 2% avg pos 10 | — | PERPLEXITY 7.1% | Claim |
| 39 | Microsoft Dynamics 365 microsoft.com | 2% avg pos 10 | — | CLAUDE 7.1% | Claim |
| 40 | Annoy (Approximate Nearest Neighbors Oh Yeah) | 2% avg pos 11 | — | CHATGPT 7.1% | Claim |
| 41 | Domino Data Lab | 2% avg pos 11 | — | CLAUDE 7.1% | Claim |
| 42 | H2O AI Cloud | 2% avg pos 11 | — | CLAUDE 7.1% | Claim |
| 43 | Turbopuffer | 2% avg pos 14 | — | GEMINI 14.3% | Claim |
| 44 | RediSearch | 2% avg pos 15 | — | CHATGPT 7.1% | Claim |
| 45 | HNSWlib | 2% avg pos 23 | — | CHATGPT 7.1% | Claim |
| 46 | Vearch | 2% avg pos 23 | — | CHATGPT 7.1% | Claim |
| 47 | Vectara vectara.com | 2% avg pos 25 | — | CHATGPT 7.1% | Claim |
| 48 | AWS | 2% | — | CLAUDE 7.1% | Claim |
| 49 | Amazon RDS | 2% | — | CLAUDE 7.1% | Claim |
| 50 | Amgix amgix.io | 2% | — | CHATGPT 7.1% | Claim |
| 51 | Azure Database for PostgreSQL | 2% | — | CLAUDE 7.1% | Claim |
| 52 | Firecrawl firecrawl.dev | 2% | — | PERPLEXITY 7.1% | Claim |
| 53 | Google Cloud SQL | 2% | — | CLAUDE 7.1% | Claim |
| 54 | HNSW | 2% | — | CLAUDE 7.1% | Claim |
| 55 | Instaclustr instaclustr.com | 2% | — | PERPLEXITY 7.1% | Claim |
| 56 | Liveblocks liveblocks.io | 2% | — | PERPLEXITY 7.1% | Claim |
| 57 | MongoDB Atlas Vector Search | 2% | — | GEMINI 14.3% | Claim |
| 58 | OpenMetal openmetal.io | 2% | — | PERPLEXITY 7.1% | Claim |
| 59 | PyTorch pytorch.org | 2% | — | CLAUDE 7.1% | Claim |
| 60 | SQLite | 2% | — | CLAUDE 7.1% | Claim |
| 61 | TensorFlow tensorflow.org | 2% | — | CLAUDE 7.1% | Claim |
| 62 | VectorChord | 2% | — | GEMINI 14.3% | Claim |
| 63 | ZenML zenml.io | 2% | — | PERPLEXITY 7.1% | Claim |
Independence: Orbator customers are badged for disclosure. Customer status does not affect prompts, sampling, extraction, or ranking — see the methodology. Your product on this list? Claim it to see the prompts behind your rank and track it weekly.
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