What AI assistants actually recommend when buyers ask about vector database tools — measured weekly across 4 engines, published as open data.
Updated 2026-08-02 · 70 sampled answers · rolling 4-week window · methodology
Rankings are measured from sampled AI answers — never editorial, never paid. Orbator builds AI-visibility tooling; when Orbator itself appears in any category, it is measured by the same rules as everyone else.
Sample: 70 AI answers · Window: Jul 5, 2026 – Aug 2, 2026 (4-week rolling) · trend vs prior 4 weeks (44 answers)
Across 70 sampled AI answers from 4 engines, Milvus is recommended most often — appearing in 88.6% of recommendations, followed by Qdrant (88.6%) and Pinecone (85.7%).
This is a measurement of share of voice across 4 AI engines — not an editorial pick. See the full ranking below.
| # | Product | Share | Trend | Engines | |
|---|---|---|---|---|---|
| 1 | Milvus milvus.io Best for: AI recommends Milvus most when buyers ask “best managed vector databases for building semantic search and RAG applications” (100% of those answers) | 88.6% 95% CI 79–94.1% 62 mentions · avg pos 5 first pick 17.7% | — | GROK 100%GEMINI 85.7%CLAUDE 57.1%PERPLEXITY 96.4% | Claim |
| 2 | Qdrant qdrant.tech Best for: AI recommends Qdrant most when buyers ask “best vector database tools for AI and machine learning applications” (100% of those answers) | 88.6% 95% CI 79–94.1% 62 mentions · avg pos 5.5 first pick 11.3% | — | GROK 100%GEMINI 78.6%CLAUDE 71.4%PERPLEXITY 100% | Claim |
| 3 | Pinecone pinecone.io Best for: AI recommends Pinecone most when buyers ask “best managed vector databases for building semantic search and RAG applications” (100% of those answers) | 85.7% 95% CI 75.7–92.1% 60 mentions · avg pos 3.8 first pick 45% | — | GROK 100%GEMINI 71.4%CLAUDE 71.4%PERPLEXITY 100% | Claim |
| 4 | Weaviate weaviate.io Best for: AI recommends Weaviate most when buyers ask “best managed vector databases for building semantic search and RAG applications” (100% of those answers) | 82.9% 95% CI 72.4–89.9% 58 mentions · avg pos 5.8 first pick 3.4% | — | GROK 100%GEMINI 82.1%CLAUDE 71.4%PERPLEXITY 82.1% | Claim |
| 5 | pgvector Best for: AI recommends pgvector most when buyers ask “best vector database tools for AI and machine learning applications” (92.3% of those answers) | 78.6% 95% CI 67.6–86.6% 55 mentions · avg pos 7.9 first pick 3.6% | — | GROK 100%GEMINI 82.1%CLAUDE 42.9%PERPLEXITY 78.6% | Claim |
| 6 | PostgreSQL postgresql.org Best for: AI recommends PostgreSQL most when buyers ask “purpose-built vector databases vs vector search extensions on existing databases” (92.3% of those answers) | 70% 95% CI 58.5–79.5% 49 mentions · avg pos 9.2 first pick 0% | — | GROK 71.4%GEMINI 82.1%PERPLEXITY 75% | Claim |
| 7 | Zilliz zilliz.com Best for: AI recommends Zilliz most when buyers ask “which vector database scales best for billions of embeddings” (84.6% of those answers) | 51.4% 95% CI 40–62.8% 36 mentions · avg pos 5.6 first pick 11.1% | — | GROK 100%GEMINI 53.6%CLAUDE 28.6%PERPLEXITY 42.9% | Claim |
| 8 | HNSW Best for: AI recommends HNSW most when buyers ask “how do I choose a vector database for a production RAG pipeline” (76.9% of those answers) | 50% 95% CI 38.6–61.4% 35 mentions · avg pos 4 first pick 34.3% | — | GROK 71.4%GEMINI 71.4%CLAUDE 14.3%PERPLEXITY 32.1% | Claim |
| 9 | Chroma trychroma.com Best for: AI recommends Chroma most when buyers ask “what should I use as a vector database for my LLM-powered search feature” (100% of those answers) | 50% 95% CI 38.6–61.4% 35 mentions · avg pos 10.9 first pick 2.9% | — | GROK 100%GEMINI 39.3%CLAUDE 42.9%PERPLEXITY 50% | Claim |
| 10 | Redis redis.io Best for: AI recommends Redis most when buyers ask “open-source alternatives to managed vector database platforms” (76.9% of those answers) | 45.7% 95% CI 34.6–57.3% 32 mentions · avg pos 11.9 first pick 3.1% | — | GROK 57.1%GEMINI 57.1%CLAUDE 14.3%PERPLEXITY 39.3% | Claim |
| 11 | Elasticsearch elastic.co Best for: AI recommends Elasticsearch most when buyers ask “purpose-built vector databases vs vector search extensions on existing databases” (92.3% of those answers) | 45.7% 95% CI 34.6–57.3% 32 mentions · avg pos 13.5 first pick 0% | — | GROK 57.1%GEMINI 60.7%CLAUDE 14.3%PERPLEXITY 35.7% | Claim |
| 12 | MongoDB mongodb.com Best for: AI recommends MongoDB most when buyers ask “purpose-built vector databases vs vector search extensions on existing databases” (84.6% of those answers) | 42.9% 95% CI 31.9–54.5% 30 mentions · avg pos 11.1 first pick 6.7% | — | GROK 57.1%GEMINI 60.7%CLAUDE 28.6%PERPLEXITY 25% | Claim |
| 13 | Postgres Best for: AI recommends Postgres most when buyers ask “open-source alternatives to managed vector database platforms” (53.8% of those answers) | 37.1% 95% CI 26.8–48.9% 26 mentions · avg pos 8.2 first pick 7.7% | — | GROK 100%GEMINI 3.6%CLAUDE 42.9%PERPLEXITY 53.6% | Claim |
| 14 | OpenSearch opensearch.org Best for: AI recommends OpenSearch most when buyers ask “best vector database tools for AI and machine learning applications” (46.2% of those answers) | 31.4% 95% CI 21.8–43% 22 mentions · avg pos 13.4 first pick 0% | — | GROK 71.4%GEMINI 35.7%PERPLEXITY 25% | Claim |
| 15 | Vespa vespa.ai Best for: AI recommends Vespa most when buyers ask “best vector database tools for AI and machine learning applications” (38.5% of those answers) | 22.9% 95% CI 14.6–34% 16 mentions · avg pos 10.5 first pick 0% | — | GROK 28.6%GEMINI 28.6%CLAUDE 28.6%PERPLEXITY 14.3% | Claim |
| 16 | Firecrawl firecrawl.dev Best for: AI recommends Firecrawl most when buyers ask “best vector database tools for AI and machine learning applications” (53.8% of those answers) | 21.4% 95% CI 13.4–32.4% 15 mentions · avg pos 9.4 first pick 6.7% | — | GROK 85.7%PERPLEXITY 32.1% | Claim |
| 17 | ZenML zenml.io Best for: AI recommends ZenML most when buyers ask “how do I choose a vector database for a production RAG pipeline” (46.2% of those answers) | 21.4% 95% CI 13.4–32.4% 15 mentions · avg pos 15 first pick 6.7% | — | GROK 42.9%PERPLEXITY 42.9% | Claim |
| 18 | FAISS faiss.ai Best for: AI recommends FAISS most when buyers ask “open-source alternatives to managed vector database platforms” (61.5% of those answers) | 18.6% 95% CI 11.2–29.2% 13 mentions · avg pos 7.9 first pick 23.1% | — | GROK 28.6%GEMINI 17.9%CLAUDE 14.3%PERPLEXITY 17.9% | Claim |
| 19 | Qdrant Cloud qdrant.io Best for: AI recommends Qdrant Cloud most when buyers ask “best managed vector databases for building semantic search and RAG applications” (69.2% of those answers) | 17.1% 95% CI 10.1–27.6% 12 mentions · avg pos 8.9 first pick 0% | — | GROK 42.9%GEMINI 10.7%CLAUDE 14.3%PERPLEXITY 17.9% | Claim |
| 20 | LanceDB lancedb.com Best for: AI recommends LanceDB most when buyers ask “open-source alternatives to managed vector database platforms” (53.8% of those answers) | 15.7% 95% CI 9–26% 11 mentions · avg pos 12.6 first pick 0% | — | GROK 42.9%GEMINI 14.3%CLAUDE 14.3%PERPLEXITY 10.7% | Claim |
| 21 | LangChain langchain.com Best for: AI recommends LangChain most when buyers ask “how do I choose a vector database for a production RAG pipeline” (38.5% of those answers) | 15.7% 95% CI 9–26% 11 mentions · avg pos 14.4 first pick 9.1% | — | GROK 71.4%GEMINI 10.7%PERPLEXITY 10.7% | Claim |
| 22 | LlamaIndex llamaindex.ai Best for: AI recommends LlamaIndex most when buyers ask “how do I choose a vector database for a production RAG pipeline” (30.8% of those answers) | 14.3% 95% CI 7.9–24.3% 10 mentions · avg pos 17.1 first pick 10% | — | GROK 71.4%GEMINI 7.1%PERPLEXITY 10.7% | Claim |
| 23 | pgvectorscale Best for: AI recommends pgvectorscale most when buyers ask “purpose-built vector databases vs vector search extensions on existing databases” (38.5% of those answers) | 12.9% 95% CI 6.9–22.7% 9 mentions · avg pos 8 first pick 0% | — | GROK 71.4%GEMINI 10.7%PERPLEXITY 3.6% | Claim |
| 24 | Turbopuffer Best for: AI recommends Turbopuffer most when buyers ask “best managed vector databases for building semantic search and RAG applications” (30.8% of those answers) | 12.9% 95% CI 6.9–22.7% 9 mentions · avg pos 12.9 first pick 0% | — | GROK 28.6%GEMINI 25% | Claim |
| 25 | DataCamp datacamp.com Best for: AI recommends DataCamp most when buyers ask “best managed vector databases for building semantic search and RAG applications” (46.2% of those answers) | 12.9% 95% CI 6.9–22.7% 9 mentions · avg pos 16 first pick 0% | — | GROK 28.6%PERPLEXITY 25% | Claim |
| 26 | Instaclustr instaclustr.com Best for: AI recommends Instaclustr most when buyers ask “open-source alternatives to managed vector database platforms” (46.2% of those answers) | 10% 95% CI 4.9–19.2% 7 mentions · avg pos 10 first pick 0% | — | GROK 28.6%PERPLEXITY 17.9% | Claim |
| 27 | Dev.to dev.to Best for: AI recommends Dev.to most when buyers ask “purpose-built vector databases vs vector search extensions on existing databases” (46.2% of those answers) | 10% 95% CI 4.9–19.2% 7 mentions · avg pos 13 first pick 0% | — | GROK 14.3%PERPLEXITY 21.4% | Claim |
| 28 | RediSearch | 8.6% 95% CI 4–17.5% 6 mentions · avg pos 10.2 first pick 0% | — | GEMINI 17.9%PERPLEXITY 3.6% | Claim |
| 29 | VectorDBBench | 8.6% 95% CI 4–17.5% 6 mentions · avg pos 19.2 first pick 0% | — | GROK 85.7% | Claim |
| 30 | ScaNN | 5.7% 95% CI 2.2–13.8% 4 mentions · avg pos 2.8 first pick 25% | — | GROK 14.3%GEMINI 3.6%PERPLEXITY 7.1% | Claim |
| 31 | Faiss (Facebook AI Similarity Search) Best for: AI recommends Faiss (Facebook AI Similarity Search) most when buyers ask “best vector database tools for AI and machine learning applications” (38.5% of those answers) | 5.7% 95% CI 2.2–13.8% 4 mentions · avg pos 7 first pick 50% | — | GEMINI 14.3% | Claim |
| 32 | DiskANN Best for: AI recommends DiskANN most when buyers ask “which vector database scales best for billions of embeddings” (38.5% of those answers) | 4.3% 95% CI 1.5–11.9% 3 mentions · avg pos 1 first pick 33.3% | — | GROK 14.3%GEMINI 3.6%PERPLEXITY 3.6% | Claim |
| 33 | lakeFS lakefs.io Best for: AI recommends lakeFS most when buyers ask “what should I use as a vector database for my LLM-powered search feature” (30.8% of those answers) | 4.3% 95% CI 1.5–11.9% 3 mentions · avg pos 1 first pick 33.3% | — | GROK 14.3%PERPLEXITY 7.1% | Claim |
| 34 | YugabyteDB yugabyte.com Best for: AI recommends YugabyteDB most when buyers ask “which vector database scales best for billions of embeddings” (46.2% of those answers) | 4.3% 95% CI 1.5–11.9% 3 mentions · avg pos 4 first pick 0% | — | GEMINI 7.1%PERPLEXITY 3.6% | Claim |
| 35 | Databricks databricks.com | 4.3% 95% CI 1.5–11.9% 3 mentions · avg pos 4.3 first pick 0% | — | GEMINI 7.1%PERPLEXITY 3.6% | Claim |
| 36 | TiDB Vector Search pingcap.com Best for: AI recommends TiDB Vector Search most when buyers ask “how do I choose a vector database for a production RAG pipeline” (30.8% of those answers) | 4.3% 95% CI 1.5–11.9% 3 mentions · avg pos 9.5 first pick 0% | — | GEMINI 3.6%PERPLEXITY 7.1% | Claim |
| 37 | AWS aws.amazon.com | 4.3% 95% CI 1.5–11.9% 3 mentions · avg pos 13 first pick 0% | — | GEMINI 7.1%PERPLEXITY 3.6% | Claim |
| 38 | Supabase supabase.com | 4.3% 95% CI 1.5–11.9% 3 mentions · avg pos 24.3 first pick 0% | — | GROK 42.9% | Claim |
| 39 | Neon neon.tech | 2.9% 95% CI 0.8–9.8% 2 mentions · avg pos 3 first pick 0% | — | GROK 14.3%PERPLEXITY 3.6% | Claim |
| 40 | Cassandra | 2.9% 95% CI 0.8–9.8% 2 mentions · avg pos 25.5 first pick 0% | — | GROK 14.3%GEMINI 3.6% | Claim |
| 41 | IBM API Connect ibm.com | 2.9% 95% CI 0.8–9.8% 2 mentions first pick 0% | — | PERPLEXITY 7.1% | Claim |
| 42 | Apigee cloud.google.com | 1.4% 95% CI 0.3–7.7% 1 mentions · avg pos 2 first pick 0% | — | GEMINI 3.6% | Claim |
| 43 | Vectara vectara.com | 1.4% 95% CI 0.3–7.7% 1 mentions · avg pos 9 first pick 0% | — | GROK 14.3% | Claim |
| 44 | Azure API Management azure.microsoft.com | 1.4% 95% CI 0.3–7.7% 1 mentions · avg pos 15 first pick 0% | — | GEMINI 3.6% | Claim |
| 45 | Aerospike aerospike.com | 1.4% 95% CI 0.3–7.7% 1 mentions · avg pos 18 first pick 0% | — | GEMINI 3.6% | Claim |
| 46 | SQLite | 1.4% 95% CI 0.3–7.7% 1 mentions · avg pos 34 first pick 0% | — | GROK 14.3% | Claim |
| 47 | Atlan atlan.com | 1.4% 95% CI 0.3–7.7% 1 mentions first pick 0% | — | PERPLEXITY 3.6% | Claim |
| 48 | Couchbase couchbase.com | 1.4% 95% CI 0.3–7.7% 1 mentions first pick 0% | — | PERPLEXITY 3.6% | Claim |
| 49 | Fastio fast.io | 1.4% 95% CI 0.3–7.7% 1 mentions first pick 0% | — | PERPLEXITY 3.6% | Claim |
| 50 | Liveblocks liveblocks.io | 1.4% 95% CI 0.3–7.7% 1 mentions first pick 0% | — | PERPLEXITY 3.6% | Claim |
| 51 | NVIDIA Canvas nvidia.com | 1.4% 95% CI 0.3–7.7% 1 mentions first pick 0% | — | PERPLEXITY 3.6% | Claim |
| 52 | Northflank northflank.com | 1.4% 95% CI 0.3–7.7% 1 mentions first pick 0% | — | PERPLEXITY 3.6% | Claim |
| 53 | OpenAlternative openalternative.co | 1.4% 95% CI 0.3–7.7% 1 mentions first pick 0% | — | PERPLEXITY 3.6% | Claim |
| 54 | OpenMetal openmetal.io | 1.4% 95% CI 0.3–7.7% 1 mentions first pick 0% | — | GROK 14.3% | Claim |
| 55 | RAGAS | 1.4% 95% CI 0.3–7.7% 1 mentions first pick 0% | — | GROK 14.3% | Claim |
| 56 | SourceForge sourceforge.net | 1.4% 95% CI 0.3–7.7% 1 mentions first pick 0% | — | PERPLEXITY 3.6% | Claim |
| 57 | Timescale Cloud timescale.com | 1.4% 95% CI 0.3–7.7% 1 mentions first pick 0% | — | PERPLEXITY 3.6% | Claim |
| 58 | X (Twitter) x.com | 1.4% 95% CI 0.3–7.7% 1 mentions first pick 0% | — | PERPLEXITY 3.6% | Claim |
Reading the numbers: Share is a point estimate on 70 sampled answers, so each row also shows its 95% CI — the Wilson score interval around that share. When two products' intervals overlap, the gap between them isn't statistically meaningful at this sample size. First pick is the share of a product's recommending answers where it was named first, which separates “always mentioned” from “usually the top recommendation”. Full methodology.
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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