# Weaviate vs Zilliz: who uses which

On usedby, 60 companies use Weaviate and 19 use Zilliz. No company is listed with both yet. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side. Latest check 2026-10-06: 68 of 79 public lines checked.

## Side by side

|  | [Weaviate](https://www.usedby.ai/tools/weaviate.md) | [Zilliz](https://www.usedby.ai/tools/zilliz.md) |
|---|---|---|
| Public customers | 60 | 19 |
| Confirmed | 17 | 12 |
| Observed | 42 | 7 |
| Signals (job posts) | 1 | 0 |
| Top industries of customers | Artificial Intelligence (5), Fintech & Payments (5), Data & Analytics (2) | Artificial Intelligence (3), Media & Publishing (2), Sales Tech & CRM (2) |
| Category | Vector Databases | Vector Databases |
| Data processing terms | A data processing agreement is available. ([weaviate.io](https://weaviate.io/dpa), checked 2026-10-03) | — |
| Free trial | Free trial or free plan available. ([weaviate.io](https://weaviate.io/pricing), checked 2026-10-03) | Free trial or free plan available. ([zilliz.com](https://zilliz.com/pricing), checked 2026-10-07) |
| Integrations | Airbyte, Confluent, Databricks, Unstructured, LlamaIndex, LangChain, DSPy, Haystack, CrewAI, Snowflake, Mem0, N8n ([weaviate.io](https://weaviate.io/product/integrations), checked 2026-10-03) | LangChain, Databricks, Confluent, Prometheus, Datadog, HoneyHive, Cohere, Haystack, FiftyOne, DSPy, Voyage AI, Jina AI ([zilliz.com](https://zilliz.com/product/integrations), checked 2026-10-07) |
| Pricing | Free: $0 /mo; Flex: $45 /mo; Premium: contact sales ([weaviate.io](https://weaviate.io/pricing), checked 2026-10-03) | — |

## Published results

Reviewed stories only; usedby did not measure the figures.

- Weaviate: [Booking.com](https://www.usedby.ai/case-studies/booking-com-weaviate.md): **40%**: “Weaviate outperformed OpenSearch by 20x at scale and with 40% lower operational costs” (captured by usedby 2026-10-02)
- Weaviate: [Delegance](https://www.usedby.ai/case-studies/delegance-weaviate.md): **$20M**: “Delegance holds $20M in premium under management across 40 accounts” (captured by usedby 2026-10-02)
- Zilliz: [Plaud](https://www.usedby.ai/case-studies/plaud-zilliz.md): **under 200ms**: “Recall returns in under 200ms on average and under 800ms at P99” (captured by usedby 2026-10-06)
- Zilliz: [Read AI](https://www.usedby.ai/case-studies/read-ai-zilliz.md): **5×**: “Read AI has achieved a 5× speedup in agentic search across diverse data sources” (captured by usedby 2026-10-06)

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Source: https://www.usedby.ai/compare/weaviate-vs-zilliz · How we check: https://www.usedby.ai/methodology