# Amazon DynamoDB vs Apache Cassandra

**Leader by Vioscale score:** Amazon DynamoDB

| Attribute | Amazon DynamoDB | Apache Cassandra |
|---|---|---|
| **Vioscale score** | 60.4 (72% (medium)) | 44.8 (40% (low)) |
| activity.commits_last_30d | - | 100 |
| adoption.dependent_repos | - | 0 |
| adoption.github_stars | - | 10,081 |
| deployment.options | `{"cloud":true}` | `{"cloud":true,"hybrid":true,"on_prem":true,"self_hosted":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. | An open-source, distributed NoSQL database that automatically scales across commodity hardware and cloud infrastructure, providing high availability and fault tolerance with no single points of failure and multi-datacenter replication support. |
| 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":"enforced","hosting":"both","data_model":"wide_column","consistency":"tunable","replication":"leaderless","multi_region":true,"partitioning":"automatic","transactions":"single_item","license_class":"permissive","query_language":"cql","secondary_indexes":"yes"}` |
| integrations.count | 10 | 19 |
| 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"}]` | `[{"name":"Amazon Keyspaces"},{"name":"Azure Cosmos DB"},{"name":"Azure Managed Instance for Apache Cassandra"},{"name":"DataStax Astra"},{"name":"Elassandra"},{"name":"Instaclustr"},{"name":"Docker"},{"name":"DataStax Studio"},{"name":"AxonOps"},{"name":"Cassandra Lucene Index"},{"name":"Elasticsearch"},{"name":"Prometheus"},{"name":"DbVisualizer"},{"name":"Apache Ignite"},{"name":"Ansible"},{"name":"Lagom"},{"name":"EmoDB"},{"name":"FiloDB"},{"name":"CQLAI"}]` |
| language.primary | - | Java |
| license.spdx | - | Apache-2.0 |
| market.availability | `{"hqCountry":"US","primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"cli":true,"web":true}` | `{"cli":true,"mac":true,"linux":true,"windows":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":"open_source","freeTier":true,"sourceUrl":"https://cassandra.apache.org","retrievedAt":"2026-08-14T11:07:28.314Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | open_source |
| pricing.price_level | low | free |
| pricing.transparent | yes | - |
| reliability.sla_pct | 99.999 | - |
| reliability.status_page | yes | - |
| security.disclosure_policy | yes | - |
| security.fedramp | yes | - |
| security.gdpr | yes | - |
| security.hipaa | yes | - |
| security.pci | yes | - |
| security.scorecard | - | 4.8 |
| security.vulnerabilities | - | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fapache%2Fcassandra&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (NoSQL Databases)

| Capability | Amazon DynamoDB | Apache Cassandra |
|---|:--:|:--:|
| **Core** |  |  |
| Data model | Document | Wide-column |
| **Query** |  |  |
| Query language | Key API only | CQL |
| **Consistency** |  |  |
| Consistency | Strong | Tunable |
| **Transactions** |  |  |
| Transactions | - | Single-item |
| **Indexing** |  |  |
| Secondary indexes | Yes | Yes |
| **Scale** |  |  |
| Partitioning / sharding | Automatic | Automatic |
| Multi-region | ✓ | ✓ |
| **Replication** |  |  |
| Replication topology | Active-active | Leaderless |
| **Deployment** |  |  |
| Hosting | Cloud only | Cloud + self-hosted |
| **Schema** |  |  |
| Schema | Schemaless | Enforced |
| **Features** |  |  |
| TTL / auto-expiry | - | - |
| Change streams / CDC | ✓ | - |
| Vector / search built-in | ✓ | - |
| **Licensing** |  |  |
| Licence class | Proprietary | Permissive OSS |

*Source: Vioscale. Generated 2026-09-01T17:20:58.545Z. "-" = undocumented, not absent.*