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 3.9 for OpenSearch, and ranks ahead in 83% 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 Weaviate if…

You want the brand AI engines rank higher (45.2 vs 3.9)
AI answers describe it more positively (59% vs 0% positive)
You need SOC 2 Type II or HIPAA (Enterprise Cloud on AWS) coverage
Strong native hybrid search

AI visibility side by side

Latest weekly run · Nov 2

Metric	OpenSearch	Weaviate
Visibility score	3.9%	45.2%
Change vs last week	New	New
Rank in Vector Databases	#16	#4
Share of voice	1.7%	11.7%
Mentions this run	8	56
Positive in AI answers	0%	59%

The stronger value in each row is marked with a ✓.

Visibility score trend

Weekly runs over the last 60 days

OpenSearch 0pp · Weaviate 0pp over 0 weekly runs.

Engine by engine

Weaviate leads on 3 of 3 engines

ChatGPT

3.9%

57.8%

AI Mode

40%

Perplexity

4.8%

37.8%

OpenSearchWeaviate

Head to head in AI answers

6 engine answers name both brands

1OpenSearch ranked higher

5Weaviate ranked higher

Prompt	Engine	OpenSearch	Weaviate
How do I choose a vector database for a mid-market team?	ChatGPT	#8	#4
How do companies store and search embeddings without a dedicated tool?	ChatGPT	#4	#9
Top vector database options for B2B SaaS companies	Perplexity	#7	#4
Compare the leading Vector Databases platforms	Perplexity	#7	#2
Which Vector Databases vendors do analysts recommend?	ChatGPT	#8	#3
Who makes the most used vector database?	AI Mode	#6	#3

Features, pricing & fit

Dimension	OpenSearch	Weaviate
Pricing model	—	Usage-based
Entry price	—	Free; paid from $45 / 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.	Serverless, Enterprise Cloud, or Bring Your Own Cloud
Compliance	—	SOC 2 Type II, HIPAA (Enterprise Cloud on AWS)
Support	Community forum, Slack, GitHub, Long-term support from certified providers	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	2021	2019
Headquarters	San Francisco, CA, United States	Amsterdam, Netherlands
Employees	51–200	51–200
Funding	—	Strategic investment (Ricoh corporate venture fund)
Best for	Organizations that want search, vector retrieval, and observability on open source software without vendor lock-in.	Development teams and enterprises building search, RAG and agent applications who want an open-source, production-ready vector database.