Amazon OpenSearch vs Weaviate
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Weaviate is the stronger AI pick in Vector Databases: it has a visibility score of 45.2 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 Weaviate if…
- You want the brand AI engines rank higher (45.2 vs 0)
- You need SOC 2 Type II or HIPAA (Enterprise Cloud on AWS) coverage
- Strong native hybrid search
- Open-source and modular AI-native design
AI visibility side by side
Latest weekly run · Nov 2
| Metric | Amazon OpenSearch | Weaviate |
|---|---|---|
| Visibility score | 0% | 45.2% |
| Change vs last week | New | New |
| Rank in Vector Databases | #28 | #4 |
| Share of voice | 0% | 11.7% |
| Mentions this run | 0 | 56 |
| Positive in AI answers | — | 59% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
Amazon OpenSearch 0pp · Weaviate 0pp over 0 weekly runs.
Engine by engine
Weaviate leads on 3 of 3 engines
Head to head in AI answers
0 engine answers name both brands
Features, pricing & fit
| Dimension | Amazon OpenSearch | Weaviate |
|---|---|---|
| Pricing model | — | Usage-based |
| Entry price | — | Free; paid from $45 / mo |
| Free plan | — | Yes |
| Deployment | Fully managed clusters or the Serverless option | Serverless, Enterprise Cloud, or Bring Your Own Cloud |
| Compliance | HIPAA eligible, PCI DSS, SOC, ISO, FedRAMP, DoD CC SRG, CSA STAR, FIPS 140-2, ISO 27017 | SOC 2 Type II, HIPAA (Enterprise Cloud on AWS) |
| Support | — | Email support on all plans, Phone and Slack support on Premium and Dedicated plans, Technical Account Team add-on on Premium and Dedicated plans |
| Founded | — | 2019 |
| Headquarters | Seattle, Washington | Amsterdam, Netherlands |
| Employees | 5,000+ | 51–200 |
| Funding | — | Strategic investment (Ricoh corporate venture fund) |
| Best for | — | Development teams and enterprises building search, RAG and agent applications who want an open-source, production-ready vector database. |
Plans side by side
Amazon OpenSearch
Pricing not available.
Weaviate
Pros and cons
Themes from the AI answers that mention each brand
Amazon OpenSearch
Profile in progress.
Weaviate
- Strong native hybrid search
- Open-source and modular AI-native design
- Free tier or trial to start
- Flexible indexing and configurable managed service
- Published pricing with an annual-commitment option
- Monthly minimum charges
- Higher tiers priced steeply above entry plan
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
Cite as: SlateIndex, “Amazon OpenSearch vs Weaviate”, https://slateindex.ai/compare/amazon-opensearch-vs-weaviate, data of Nov 2, 2026. Licence: CC BY 4.0.