# Amazon DynamoDB vs Azure Cosmos DB

**Leader by Vioscale score:** Amazon DynamoDB

| Attribute | Amazon DynamoDB | Azure Cosmos DB |
|---|---|---|
| **Vioscale score** | 60.4 (72% (medium)) | 48.6 (31% (low)) |
| deployment.options | `{"cloud":true}` | `{"cloud":true}` |
| description.long | A cloud-native database service that scales instantly to handle any workload size while maintaining millisecond response times, requiring no server provisioning or maintenance, with built-in capabilities for AI applications including native vector search and global multi-region replication. | 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. |
| features.capabilities | `{"schema":"schemaless","hosting":"cloud","data_model":"document","consistency":"strong","replication":"active_active","multi_region":true,"partitioning":"automatic","license_class":"proprietary","vector_search":true,"change_streams":true,"query_language":"key_only","secondary_indexes":"yes"}` | `{"schema":"schemaless","hosting":"cloud","data_model":"multi_model","multi_region":true,"license_class":"proprietary","vector_search":true}` |
| integrations.count | 10 | - |
| integrations.list | `[{"name":"AWS Lambda"},{"name":"Amazon OpenSearch Service"},{"name":"Amazon SageMaker"},{"name":"Amazon Redshift"},{"name":"Amazon S3 Tables"},{"name":"DynamoDB Accelerator (DAX)"},{"name":"AWS Key Management Service (KMS)"},{"name":"AWS Identity and Access Management (IAM)"},{"name":"AWS CloudWatch"},{"name":"AWS PrivateLink"}]` | - |
| market.availability | `{"hqCountry":"US","primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"hqCountry":"US","primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"web":true}` | `{"web":true}` |
| pricing | `{"type":"usage","summary":"Pay-as-you-go model. Free tier available.","currency":"USD","freeTier":true,"sourceUrl":"https://aws.amazon.com/pricing/?nc2=h_pr_pr","retrievedAt":"2026-08-14T11:06:10.784Z","billingPeriods":["month"]}` | `{"type":"usage","currency":"USD","freeTier":true,"sourceUrl":"https://azure.microsoft.com/acom/etc.clientlibs/onecloud/components/content/reimagine/atomic/carousel/v1/carousel/clientlibs/pricing-styles.ACSHASHbcdafd3e07059ae596973551430292fc.min.css","retrievedAt":"2026-08-14T11:05:21.839Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | freemium |
| pricing.price_level | low | low |
| pricing.transparent | yes | - |
| reliability.sla_pct | 99.999 | - |
| reliability.status_page | yes | yes |
| security.disclosure_policy | yes | - |
| security.fedramp | yes | - |
| security.gdpr | yes | yes |
| security.hipaa | yes | - |
| security.pci | yes | - |

## Capabilities (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 | - | - |
| **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 |

*Source: Vioscale. Generated 2026-09-01T17:35:33.822Z. "-" = undocumented, not absent.*