Databases for semantic search and AI memory
227 companies on usedby use at least one of the 7 tools in this category with a public customer. Qdrant and Weaviate lead together, with 60 companies each. Then come Pinecone (57) and Zilliz (19). 8 companies run two of these tools or more. The most common pair is Pinecone with Qdrant (3 companies).Latest check Oct 7, 2026: 221 of 236 public lines checked. Counts are of companies on usedby, not of the whole market: we list a company when a public page shows its AI tools.
227
companies on usedby use a tool of this category
Companies with a public line for each tool. Job-post signals count and are drawn apart in the proof bar.
| # | Tool | Customers | Proof |
|---|---|---|---|
| 1 |  Qdrant | 60 | |
| 1 |  Weaviate | 60 | |
| 3 |  Pinecone | 57 | |
| 4 |  Zilliz | 19 | |
| 5 |  LanceDB | 16 | |
| 6 |  Vespa | 14 | |
| 7 |  Chroma | 10 |
8 companies run two of these tools or more. The most common pair is Pinecone with Qdrant, at 3 companies.
Qdrant60 customersQdrant is used by 60 companies on usedby, 12 confirmed by a case study, a named quote or a press release. Named customers include Microsoft, Bayer, and Bosch. Who uses Qdrant, Pinecone vs Qdrant
Customer page: qdrant.tech. Latest check of 58 of 60 lines: Oct 5, 2026.
Weaviate60 customersWeaviate is used by 60 companies on usedby, 17 confirmed by a case study, a named quote or a press release. Named customers include Booking.com, Bosch, and Cisco. Who uses Weaviate, Pinecone vs Weaviate
Customer page: weaviate.io. Latest check of 49 of 60 lines: Oct 5, 2026.
Pinecone57 customersPinecone is used by 57 companies on usedby, 27 confirmed by a case study, a named quote or a press release. Named customers include L'Oréal, Microsoft, and OpenAI. Who uses Pinecone, Pinecone vs Qdrant
Customer page: pinecone.io. Latest check of 56 of 57 lines: Oct 5, 2026.
Zilliz19 customersZilliz is used by 19 companies on usedby, 12 confirmed by a case study, a named quote or a press release. Named customers include Meta, Nvidia, and TikTok. Who uses Zilliz, Pinecone vs Zilliz
Customer page: zilliz.com. Latest check of 19 of 19 lines: Oct 6, 2026.
Companies first listed by a tool of this category in the last 90 days.
Side-by-side pages with the companies behind each tool.
Answers drawn from usedby data.
Qdrant and Weaviate are tied, each used by 60 of the 227 companies on usedby in this category. Then come Pinecone (57) and Zilliz (19). Who uses Qdrant.
Qdrant: 60 companies on usedby, against 60 for Weaviate. 1 company uses both, counting confirmed and observed lines only.
Yes: 8 of the 227 companies on usedby in this category run two or more. The most common pair is Pinecone with Qdrant (3 companies).
By the number of companies with a public line for each tool, read from dated captures of vendor customer pages, case studies, press releases and job posts. Job-post signals count in the totals and are shown apart. usedby lists a company when a public page shows it, so these counts describe the companies on usedby, not the whole market.