Amazon 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 0 for Amazon OpenSearch.
Choose Amazon OpenSearch if…
- You need HIPAA eligible or PCI DSS or SOC or ISO or FedRAMP or DoD CC SRG or CSA STAR or FIPS 140-2 or ISO 27017 coverage
- You prefer a larger, established vendor (5,000+ employees)
Choose Zilliz Cloud if…
- You want the brand AI engines rank higher (23 vs 0)
- You need SOC 2 Type II or ISO/IEC 27001 or GDPR ready or HIPAA ready coverage
- built for billion-scale vector workloads
- free tier with 5 GB storage
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Amazon OpenSearch | Zilliz Cloud |
|---|---|---|
| Visibility score | 0% | 23% |
| Change vs last week | New | New |
| Rank in Vector Databases | #28 | #5 |
| Share of voice | 0% | 6.3% |
| Mentions this run | 0 | 30 |
| Positive in AI answers | — | 32% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Amazon 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
0 engine answers name both brands
Features, pricing & fit
| Dimension | Amazon OpenSearch | Zilliz Cloud |
|---|---|---|
| Pricing model | — | Usage-based |
| Entry price | — | Free; paid from $197 / mo |
| Free plan | — | Yes |
| Deployment | Fully managed clusters or the Serverless option | Fully managed SaaS, bring-your-own-cloud (BYOC) with data in the customer's VPC, and self-run open-source Milvus |
| Compliance | HIPAA eligible, PCI DSS, SOC, ISO, FedRAMP, DoD CC SRG, CSA STAR, FIPS 140-2, ISO 27017 | SOC 2 Type II, ISO/IEC 27001, GDPR ready, HIPAA ready |
| Support | — | Community support bot, Email/ticket portal, Slack private channel, Zoom, Google Meet or Teams calls |
| Founded | — | 2017 |
| Headquarters | Seattle, Washington | Redwood City, California |
| Employees | 5,000+ | 51–200 |
| Funding | — | Series B extension · $113M raised |
| Best for | — | 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
Amazon OpenSearch
Pricing not available.
Zilliz Cloud
Pros and cons
Themes from the AI answers that mention each brand
Amazon OpenSearch
Profile in progress.
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, “Amazon OpenSearch vs Zilliz Cloud”, https://slateindex.ai/compare/amazon-opensearch-vs-zilliz-cloud, data of Nov 2, 2026. Licence: CC BY 4.0.