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SlateIndex
Amazon OpenSearchManaged retrieval engine for agentic AI, search, and analytics
vs
VespaThe AI Search Platform for fast, accurate AI search
Comparison · Vector Databases · weekly run Nov 2

Amazon OpenSearch vs Vespa

Which one do AI engines recommend, and how do they differ on price, fit and features?

Track both brands

The short answer

Vespa is the stronger AI pick in Vector Databases: it has a visibility score of 3.8 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 Vespa if…

  • You want the brand AI engines rank higher (3.8 vs 0)
  • Massive-scale big data serving engine and AI search platform
  • Billion-scale hybrid search with native tensor calculations
  • Suited to sophisticated recommendation, ranking, and personalization with custom ranking logic

AI visibility side by side

Latest weekly run · Nov 2

Metric Amazon OpenSearch Vespa
Visibility score0%3.8%
Change vs last weekNewNew
Rank in Vector Databases#28#17
Share of voice0%1.9%
Mentions this run09
Positive in AI answers—67%

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

Visibility score trend

Weekly runs over the last 60 days

0%25%50%75%100%Nov 2Amazon OpenSearch 0%

Amazon OpenSearch 0pp · Vespa 0pp over 0 weekly runs.

Engine by engine

Vespa leads on 3 of 3 engines

ChatGPT
0%
5.9%
AI Mode
0%
2.2%
Perplexity
0%
3.1%
Amazon OpenSearchVespa

Head to head in AI answers

0 engine answers name both brands

0Amazon OpenSearch ranked higher
0Vespa ranked higher

Features, pricing & fit

DimensionAmazon OpenSearchVespa
DeploymentFully managed clusters or the Serverless optionOpen source for self-hosting, Vespa Cloud fully managed on AWS and Google Cloud marketplaces, and Enclave, which runs hosts in the customer's own cloud account.
ComplianceHIPAA eligible, PCI DSS, SOC, ISO, FedRAMP, DoD CC SRG, CSA STAR, FIPS 140-2, ISO 27017—
Support—Developer center and documentation, Vespa Slack community
Founded—2023
HeadquartersSeattle, WashingtonTrondheim, Norway
Employees5,000+51–200
Funding—Series A, led by Blossom Capital · $31M raised
Best for—Teams building search, retrieval-augmented generation, recommendation and personalization applications that must run at large scale.

Pros and cons

Themes from the AI answers that mention each brand

Amazon OpenSearch

Profile in progress.

Vespa

  • Massive-scale big data serving engine and AI search platform
  • Billion-scale hybrid search with native tensor calculations
  • Suited to sophisticated recommendation, ranking, and personalization with custom ranking logic
  • High-throughput serving
  • Recognised by analysts among strongest vector database vendors

    Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run

    Cite as: SlateIndex, “Amazon OpenSearch vs Vespa”, https://slateindex.ai/compare/amazon-opensearch-vs-vespa, data of Nov 2, 2026. Licence: CC BY 4.0.