# Vector databases for small business buyers: what AI models recommend, October 2026

Gane Index, October 2026 Edition. Asked as "vector database" and as "vector search database for AI applications", six framings each, to fourteen models with search on, on behalf of a small B2B company. Page: https://www.gane.ai/index/it/it-data/vector-databases/2026-10/smb

This is the permanent record of the October 2026 Edition, published October 1, 2026 and superseded since. The current standing: https://www.gane.ai/index/it/it-data/vector-databases/smb/index.md

**Standing:** pgvector leads with 49% of first choices; verdict clear leader. 59 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| Rank | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | [pgvector](https://www.gane.ai/index/it/vendors/pgvector/index.md) | 49% | 2% | 65 |
| 2 | [Pinecone](https://www.gane.ai/index/it/vendors/pinecone/index.md) | 24% | 35% | 71 |
| 3 | [Qdrant](https://www.gane.ai/index/it/vendors/qdrant/index.md) | 17% | 3% | 73 |
| 4 | [Weaviate](https://www.gane.ai/index/it/vendors/weaviate/index.md) | 5% | 18% | 66 |
| 5 | [Chroma](https://www.gane.ai/index/it/vendors/chroma/index.md) | 5% | 29% | 42 |
| 6 | [LanceDB](https://www.gane.ai/index/it/vendors/lancedb/index.md) | 0% | 9% | 11 |
| 35 | [Milvus](https://www.gane.ai/index/it/vendors/milvus/index.md) | 0% | 52% | 42 |

Rank is by share of first choices among all 35 products named; products with the same share are tied, and the order among them carries no meaning. The table lists those with at least 10 labels.

## Each model's first choice on the direct prompt

- Claude Haiku 4.5: Pinecone; alternatives Supabase pgvector, Weaviate
- GPT-5.4 mini: Qdrant; alternatives Weaviate
- Gemini 3.5 Flash: pgvector; alternatives LanceDB, Pinecone, Qdrant, Weaviate
- Perplexity Sonar: Qdrant, pgvector; alternatives Chroma
- Grok 4.20: Qdrant, pgvector; alternatives Pinecone
- Mistral Small: Pinecone; alternatives Qdrant, Weaviate, pgvector
- DeepSeek V4 Flash: pgvector; alternatives Pinecone, Qdrant, Supabase pgvector
- Llama 4 Maverick: pgvector; alternatives Milvus, Pinecone, Weaviate
- Qwen 3.7 Flash: pgvector; alternatives Pinecone, Qdrant
- Kimi K2: Pinecone; alternatives Qdrant, Weaviate, pgvector
- GLM 4.7 FlashX: pgvector; alternatives Pinecone, Qdrant, Supabase pgvector, Weaviate
- MiniMax M2.5: Pinecone; alternatives Qdrant, Weaviate
- GPT-6 Luna: pgvector; alternatives Pinecone, Qdrant
- Muse Glimmer 30B: Pinecone, Qdrant; alternatives Chroma, Weaviate, pgvector

## Sources the answers cite

75 of 84 answers came back with a source list, from 14 of 14 models. Sites named in the most answers:

- dev.to: 31 answers, 44 citations
- pecollective.com: 31 answers, 37 citations
- marktechpost.com: 28 answers, 28 citations
- g2.com: 25 answers, 34 citations
- firecrawl.dev: 25 answers, 25 citations
- iternal.ai: 24 answers, 25 citations
- cognee.ai: 23 answers, 24 citations
- altexsoft.com: 18 answers, 19 citations

Pages named in the most answers:

- https://marktechpost.com/2026/05/10/best-vector-databases-in-2026-pricing-scale-limits-and-architecture-tradeoffs-across-nine-leading-systems (28 answers)
- https://pecollective.com/tools/best-vector-databases (27 answers)
- https://firecrawl.dev/blog/best-vector-databases (25 answers)
- https://iternal.ai/insights/best-vector-databases-2026 (24 answers)
- https://cognee.ai/best-vector-database (23 answers)
- https://dev.to/michaelaiglobal/beyond-pinecone-a-developers-deep-dive-into-the-top-10-vector-databases-for-genai-in-2024-4no9 (20 answers)
- https://g2.com/articles/best-vector-databases (20 answers)
- https://altexsoft.com/blog/vector-databases-compared (18 answers)
- https://mastra.ai/articles/best-vector-database-providers (16 answers)
- https://blog.n8n.io/best-vector-database (13 answers)

## Warned against

- Pinecone: 25 of 71 labels negative. "Ones to Avoid or Use with Extreme Caution:
- Pinecone (fully managed SaaS)... SMBs risk overspending" (Grok 4.20, negative prompt)
- Milvus: 22 of 42 labels negative. "Why avoid: Milvus is powerful for large-scale projects ... It's not suitable for small businesses with limited technical resources" (Mistral Small, negative prompt)
- Weaviate: 12 of 66 labels negative. "costs escalate for production use; self-hosted version demands schema planning and ops" (Grok 4.20, negative prompt)
- Chroma: 12 of 42 labels negative. "Chroma is currently best suited for single-node deployments. It lacks robust authentication, authorization, and high-concurrency handling" (Qwen 3.7 Flash, negative prompt)

## Movement since September 2026

Floor: 11 points of share, measured on the calibration repeat.
Same leader: pgvector at 45%.

- Qdrant: 30% to 18%, −12. Cleared the floor by 1 point · rank 2 → 3 of 29.
- Pinecone: 16% to 25%, +9. Inside the floor by 2 points · rank 3 → 2 of 29.
- Weaviate: 4% to 6%, +2. Inside the floor by 9 points · rank 4 of 29, unchanged.
- Chroma: 4% to 6%, +2. Inside the floor by 9 points · rank 5 of 29, unchanged.
- pgvector: 46% to 45%, −1. Inside the floor by 10 points · rank 1 of 29, unchanged.
- LanceDB: 0% to 0%, ±0. Inside the floor by 11 points · rank 6 of 29, unchanged.
- Milvus: 0% to 0%, ±0. Inside the floor by 11 points · rank 25 → 29 of 29.

## Record

- Method: https://www.gane.ai/index/it/methodology
- License: CC BY 4.0. Cite as Gane Index, October 2026 Edition, www.gane.ai/index/it.