OpenSearch vs Zilliz Cloud
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Zilliz Cloud is the stronger AI pick in Vector Databases: it has a visibility score of 23 versus 3.9 for OpenSearch, and ranks ahead in 100% of the answers that name both.
Choose OpenSearch if…
- Strong general database popularity
- Hybrid keyword-plus-semantic search with dense vectors
- Suited to broader search, logging, analytics, and observability
Choose Zilliz Cloud if…
- You want the brand AI engines rank higher (23 vs 3.9)
- AI answers describe it more positively (32% vs 0% positive)
- You need SOC 2 Type II or ISO/IEC 27001 or GDPR ready or HIPAA ready coverage
- built for billion-scale vector workloads
AI visibility side by side
Latest weekly run · Nov 2
| Metric | OpenSearch | Zilliz Cloud |
|---|---|---|
| Visibility score | 3.9% | 23% |
| Change vs last week | New | New |
| Rank in Vector Databases | #16 | #5 |
| Share of voice | 1.7% | 6.3% |
| Mentions this run | 8 | 30 |
| Positive in AI answers | 0% | 32% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
OpenSearch 0pp · Zilliz Cloud 0pp over 0 weekly runs.
Engine by engine
Zilliz Cloud leads on 3 of 3 engines
Head to head in AI answers
3 engine answers name both brands
| Prompt | Engine | OpenSearch | Zilliz Cloud |
|---|---|---|---|
| How do I choose a vector database for a mid-market team? | ChatGPT | #8 | #5 |
| Top vector database options for B2B SaaS companies | Perplexity | #7 | #5 |
| Compare the leading Vector Databases platforms | Perplexity | #7 | #4 |
Features, pricing & fit
| Dimension | OpenSearch | Zilliz Cloud |
|---|---|---|
| Pricing model | — | Usage-based |
| Entry price | — | Free; paid from $197 / mo |
| Free plan | — | Yes |
| Deployment | Self-managed, or through Amazon OpenSearch Service and managed providers such as Aiven and Instaclustr. A Kubernetes operator is available for managing clusters. | Fully managed SaaS, bring-your-own-cloud (BYOC) with data in the customer's VPC, and self-run open-source Milvus |
| Compliance | — | SOC 2 Type II, ISO/IEC 27001, GDPR ready, HIPAA ready |
| Support | Community forum, Slack, GitHub, Long-term support from certified providers | Community support bot, Email/ticket portal, Slack private channel, Zoom, Google Meet or Teams calls |
| Founded | 2021 | 2017 |
| Headquarters | San Francisco, CA, United States | Redwood City, California |
| Employees | 51–200 | 51–200 |
| Funding | — | Series B extension · $113M raised |
| Best for | Organizations that want search, vector retrieval, and observability on open source software without vendor lock-in. | Teams running production AI applications that need low-latency vector search at scale, and regulated sectors such as healthcare and finance |
Plans side by side
OpenSearch
Pricing not available.
Zilliz Cloud
Pros and cons
Themes from the AI answers that mention each brand
OpenSearch
- Strong general database popularity
- Hybrid keyword-plus-semantic search with dense vectors
- Suited to broader search, logging, analytics, and observability
Zilliz Cloud
- built for billion-scale vector workloads
- free tier with 5 GB storage
- managed Milvus cloud option
- transparent pricing with pay-as-you-go options
- free trial with $100 in credits
- requires team able to support distributed infrastructure
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “OpenSearch vs Zilliz Cloud”, https://slateindex.ai/compare/opensearch-vs-zilliz-cloud, data of Nov 2, 2026. Licence: CC BY 4.0.