Comparison

Amazon Neptune vs Virtuoso

On the evidence we track, Amazon Neptune leads this comparison with a composite score of 45/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Amazon Neptune full profile →Virtuoso full profile →

Machine formatsJSON Markdown GraphQLor send Accept: application/json

★Amazon Neptune45

Virtuoso35

Attribute comparison across 2 tools
Attribute	Amazon NeptuneLeader	Virtuoso
Vioscale score	45 / 100medium · 56%	35 / 100medium · 62%
Pricing
Free tierpricing.free_tier	✗	✗
Modelpricing.model	commercial	commercial
Price levelpricing.price_level	unknown	high
Transparentpricing.transparent	✓	✓
Integrations
Countintegrations.count	2	6
Security
Disclosure policysecurity.disclosure_policy	✓	-
Scorecardsecurity.scorecard	-	2.6
Vulnerabilitiessecurity.vulnerabilities	-	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=com.openlinksw%3Avirtjdbc4&per_page=100 · Last 12m: 0
Reliability
Status pagereliability.status_page	✓	✓
Adoption
Dependent reposadoption.dependent_repos	-	1
Github starsadoption.github_stars	-	973
Package downloads weeklyadoption.package_downloads_weekly	-	22
Activity
Commits last 30dactivity.commits_last_30d	-	16
Release
Cadence daysrelease.cadence_days	-	143
Historyrelease.history	-	19 items
License
Spdxlicense.spdx	-	BSD
Language
Primarylanguage.primary	-	C
Market
Availabilitymarket.availability	Available worldwide · Popular in US	Available worldwide · Popular in US

Score

Vioscale score

Amazon Neptune45 / 100medium · 56%

Virtuoso35 / 100medium · 62%

Pricing

Free tier

Amazon Neptune✗

Virtuoso✗

Model

Amazon Neptunecommercial

Virtuosocommercial

Price level

Amazon Neptuneunknown

Virtuosohigh

Transparent

Amazon Neptune✓

Virtuoso✓

Integrations

Count

Amazon Neptune2

Virtuoso6

Security

Disclosure policy

Amazon Neptune✓

Virtuoso–

Scorecard

Amazon Neptune–

Virtuoso2.6

Vulnerabilities

Amazon Neptune–

VirtuosoCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=com.openlinksw%3Avirtjdbc4&per_page=100 · Last 12m: 0

Reliability

Status page

Amazon Neptune✓

Virtuoso✓

Adoption

Dependent repos

Amazon Neptune–

Virtuoso1

Github stars

Amazon Neptune–

Virtuoso973

Package downloads weekly

Amazon Neptune–

Virtuoso22

Activity

Commits last 30d

Amazon Neptune–

Virtuoso16

Release

Cadence days

Amazon Neptune–

Virtuoso143

History

Amazon Neptune–

Virtuoso19 items

License

Spdx

Amazon Neptune–

VirtuosoBSD

Language

Primary

Amazon Neptune–

VirtuosoC

Market

Availability

Amazon NeptuneAvailable worldwide · Popular in US

VirtuosoAvailable worldwide · Popular in US

Capabilities

Feature-by-feature on the axes that matter for graph databases. “-” means undocumented, not absent.

Capability comparison for Graph Databases
Capability	Amazon Neptune	Virtuoso
Model
Graph model	Multi-model	RDF / triple
Query language(s)	Gremlin, openCypher, SPARQL	SPARQL
Transactions
ACID transactions	Full	-
Consistency model	-	-
Architecture
Storage	-	-
Distributed / scale	Sharded	-
Replication / HA	✓	-
OLTP vs OLAP	Both	Both
Deployment
Deployment	Managed	Self-hosted
Search
Full-text search	None	-
Built-in vector search	✓	-
Licensing
Licence class	Proprietary	-
Portability
openCypher / TinkerPop standard	✓	-

Model

Graph model

Amazon NeptuneMulti-model

VirtuosoRDF / triple

Query language(s)

Amazon NeptuneGremlin, openCypher, SPARQL

VirtuosoSPARQL

Transactions

ACID transactions

Amazon NeptuneFull

Virtuoso-

Consistency model

Amazon Neptune-

Virtuoso-

Architecture

Storage

Amazon Neptune-

Virtuoso-

Distributed / scale

Amazon NeptuneSharded

Virtuoso-

Replication / HA

Amazon Neptune✓

Virtuoso-

OLTP vs OLAP

Amazon NeptuneBoth

VirtuosoBoth

Deployment

Amazon NeptuneManaged

VirtuosoSelf-hosted

Full-text search

Amazon NeptuneNone

Virtuoso-

Built-in vector search

Amazon Neptune✓

Virtuoso-

Licensing

Licence class

Amazon NeptuneProprietary

Virtuoso-

Portability

openCypher / TinkerPop standard

Amazon Neptune✓

Virtuoso-

What each one is

The product in its own terms, so the numbers below have context.

Amazon Neptune

Leader

A cloud-based graph database that scales serverlessly and analyzes relationships across structured and unstructured data. Designed to improve AI application accuracy through integrated GraphRAG capabilities and support for agentic memory tools.

Independently observed

Virtuoso

Enterprise-grade platform designed to consolidate and govern data from diverse sources—databases, knowledge graphs, file systems, and APIs—with built-in support for AI agents and language model integration.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Amazon Neptune

Leader

Hybrid

Pay-as-you-go pricing with on-demand, serverless, and savings plan options. No minimum fees or upfront commitments for on-demand/serverless.

On-demandPay-as-you-go with no commitments
- No minimum fees
- No upfront commitments
- Flexible configuration
ServerlessServerless with automatic scaling
- Automatic scaling
- No minimum fees
- No upfront commitments
Database Savings PlansUsage-based savings plan with 1-year commitment
- Savings vs. on-demand
- 1-year commitment
Neptune AnalyticsPer m-NCU-hour billing with pause option
- Fast analytics on billions of connections
- In-memory storage
- Optimized graph algorithms
- Low-latency queries
- Vector search
- +1 more

as of 2026-08-01verify ↗

Virtuoso

from $99.99/moPerpetual licence

From $99.99 perpetual license, Enterprise custom pricing

Personal$99.99 one-time
Developer$199 one-time
Project$499 one-time
EnterpriseContact sales
- Unlimited Concurrent Sessions
- Unlimited CPU Cores
- Server-Grade Operating Systems
- Enterprise Support
- Custom Licensing Terms

as of 2026-08-14verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Amazon Neptune	Virtuoso
WebPlatforms	✓	✗
macOSPlatforms	✗	✓
WindowsPlatforms	✗	✓
LinuxPlatforms	✗	✓
CLIPlatforms	✓	✓
Cloud / SaaSDeployment	✓	✗
Self-hostedDeployment	✗	✓

Platforms

Web

Amazon Neptune✓

Virtuoso✗

macOS

Amazon Neptune✗

Virtuoso✓

Windows

Amazon Neptune✗

Virtuoso✓

Linux

Amazon Neptune✗

Virtuoso✓

CLI

Amazon Neptune✓

Virtuoso✓

Deployment

Cloud / SaaS

Amazon Neptune✓

Virtuoso✗

Self-hosted

Amazon Neptune✗

Virtuoso✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Amazon Neptune

Leader

2 total

Amazon Bedrock Knowledge Bases
Strands AI Agents SDK

Independently observed

Virtuoso

6 total

SQLAlchemy
RDFLib
SQL databases
NoSQL databases
Linked Data sources
APIs

Independently observed

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.