Comparison

Amazon DynamoDB vs Azure Cosmos DB

On the evidence we track, Amazon DynamoDB leads this comparison with a composite score of 88/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Amazon DynamoDB full profile →Azure Cosmos DB full profile →

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.

★Amazon DynamoDB88

Azure Cosmos DB57

Attribute comparison across 2 tools
Attribute	Amazon DynamoDBLeader	Azure Cosmos DB
vioscaleAI score	88 / 100medium · 73%	57 / 100low · 31%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	freemium	freemium
Price levelpricing.price_level	low	low
Starting pricepricing.starting_price	$0.25	-
Transparentpricing.transparent	✓	✓
Integrations
Countintegrations.count	9	-
Security
Certificationssecurity.certifications	SOC 2, PCI DSS, HIPAA/HITECH, FedRAMP, GDPR	-
Disclosure policysecurity.disclosure_policy	✓	-
Fedrampsecurity.fedramp	✓	-
Gdprsecurity.gdpr	✓	✓
Hipaasecurity.hipaa	✓	-
Iso27001security.iso27001	✓	-
Pcisecurity.pci	✓	-
Soc2security.soc2	✓	-
Trust centersecurity.trust_center	https://aws.amazon.com/compliance/	https://azure.microsoft.com/en-us/explore/security/
Reliability
Sla pctreliability.sla_pct	99.999	-
Status pagereliability.status_page	✓	✓
Market
Availabilitymarket.availability	Available worldwide · Popular in US	Available worldwide · HQ US
Content
Faqcontent.faq	7 items	6 items

Score

vioscaleAI score

Amazon DynamoDB88 / 100medium · 73%

Azure Cosmos DB57 / 100low · 31%

Pricing

Free tier

Amazon DynamoDB✓

Azure Cosmos DB✓

Model

Amazon DynamoDBfreemium

Azure Cosmos DBfreemium

Price level

Amazon DynamoDBlow

Azure Cosmos DBlow

Starting price

Amazon DynamoDB$0.25

Azure Cosmos DB–

Transparent

Amazon DynamoDB✓

Azure Cosmos DB✓

Integrations

Count

Amazon DynamoDB9

Azure Cosmos DB–

Security

Certifications

Amazon DynamoDBSOC 2, PCI DSS, HIPAA/HITECH, FedRAMP, GDPR

Azure Cosmos DB–

Disclosure policy

Amazon DynamoDB✓

Azure Cosmos DB–

Fedramp

Amazon DynamoDB✓

Azure Cosmos DB–

Gdpr

Amazon DynamoDB✓

Azure Cosmos DB✓

Hipaa

Amazon DynamoDB✓

Azure Cosmos DB–

Iso27001

Amazon DynamoDB✓

Azure Cosmos DB–

Pci

Amazon DynamoDB✓

Azure Cosmos DB–

Soc2

Amazon DynamoDB✓

Azure Cosmos DB–

Trust center

Amazon DynamoDBhttps://aws.amazon.com/compliance/

Azure Cosmos DBhttps://azure.microsoft.com/en-us/explore/security/

Reliability

Sla pct

Amazon DynamoDB99.999

Azure Cosmos DB–

Status page

Amazon DynamoDB✓

Azure Cosmos DB✓

Market

Availability

Amazon DynamoDBAvailable worldwide · Popular in US

Azure Cosmos DBAvailable worldwide · HQ US

Content

Faq

Amazon DynamoDB7 items

Azure Cosmos DB6 items

Capabilities

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

Capability comparison for NoSQL Databases
Capability	Amazon DynamoDB	Azure Cosmos DB
Core
Data model	Document	Multi-model
Query
Query language	Key API only	-
Consistency
Consistency	Strong	-
Transactions
Transactions	Multi-item ACID	-
Indexing
Secondary indexes	Yes	-
Scale
Partitioning / sharding	Automatic	-
Multi-region	✓	✓
Replication
Replication topology	Active-active	-
Deployment
Hosting	Cloud only	Cloud only
Schema
Schema	Schemaless	Schemaless
Features
TTL / auto-expiry	✓	-
Change streams / CDC	✓	-
Vector / search built-in	✓	✓
Licensing
Licence class	Proprietary	Proprietary

Core

Data model

Amazon DynamoDBDocument

Azure Cosmos DBMulti-model

Query

Query language

Amazon DynamoDBKey API only

Azure Cosmos DB-

Consistency

Amazon DynamoDBStrong

Azure Cosmos DB-

Transactions

Amazon DynamoDBMulti-item ACID

Azure Cosmos DB-

Indexing

Secondary indexes

Amazon DynamoDBYes

Azure Cosmos DB-

Scale

Partitioning / sharding

Amazon DynamoDBAutomatic

Azure Cosmos DB-

Multi-region

Amazon DynamoDB✓

Azure Cosmos DB✓

Replication

Replication topology

Amazon DynamoDBActive-active

Azure Cosmos DB-

Deployment

Hosting

Amazon DynamoDBCloud only

Azure Cosmos DBCloud only

Schema

Amazon DynamoDBSchemaless

Azure Cosmos DBSchemaless

Features

TTL / auto-expiry

Amazon DynamoDB✓

Azure Cosmos DB-

Change streams / CDC

Amazon DynamoDB✓

Azure Cosmos DB-

Vector / search built-in

Amazon DynamoDB✓

Azure Cosmos DB✓

Licensing

Licence class

Amazon DynamoDBProprietary

Azure Cosmos DBProprietary

What each one is

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

Amazon DynamoDB

Leader

A fully managed cloud database service for key-value and document data, providing automatic scaling, pay-per-request billing, instant availability, and single-digit millisecond performance without requiring infrastructure management or maintenance.

Independently observed

Azure Cosmos DB

Azure Cosmos DB is a NoSQL database service on Azure that prioritizes minimal latency and the ability to handle massive scale. It includes built-in vector search capabilities for AI-driven applications and is managed fully by Microsoft with no infrastructure to operate.

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 DynamoDB

Leader

from $0.25/gbUsage-basedFree tier

From pay-per-request usage or provisioned capacity. Free tier includes 200M requests/month and 25GB storage.

On-DemandPay per read/write request and storage used
- Serverless
- Automatic scaling
- Vector search
- ACID transactions
- Global tables
Provisioned CapacityFixed provisioned throughput with optional reserved capacity
- Predictable pricing
- Reserved capacity discounts
- Write throughput provisioning
Free TierFree
- Learning and development
- Personal apps
- Prototypes

as of 2026-10-05verify ↗

Azure Cosmos DB

Free tier

as of 2026-09-22verify ↗

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 DynamoDB	Azure Cosmos DB
WebPlatforms	✓	✓
CLIPlatforms	✓	✗
Cloud / SaaSDeployment	✓	✓

Platforms

Web

Amazon DynamoDB✓

Azure Cosmos DB✓

CLI

Amazon DynamoDB✓

Azure Cosmos DB✗

Deployment

Cloud / SaaS

Amazon DynamoDB✓

Azure Cosmos DB✓

Integrations

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

Amazon DynamoDB

Leader

17 total

AWS Lambda
Amazon OpenSearch Service
Amazon SageMaker
Amazon Redshift
Amazon S3 Tables
DynamoDB Accelerator (DAX)
AWS Key Management Service (KMS)
AWS Identity and Access Management (IAM)
AWS CloudWatch
AWS PrivateLink
DynamoDB Accelerator
Kinesis Data Streams
CloudWatch
Amazon Kinesis Data Streams
Amazon Bedrock
OpenAI
Cohere

Independently observed

Azure Cosmos DB

Not documented yet.

Still deciding?

Amazon DynamoDB or Azure Cosmos DB: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

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