Amazon DocumentDB vs Amazon ElastiCache
Amazon DocumentDB
aws.amazon.com
Amazon ElastiCache
aws.amazon.comSide by side
| Figure | Amazon DocumentDB | Amazon ElastiCache |
|---|---|---|
| Price from | — | $0.09/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | Yes | Yes |
| Plans published | 11 | 6 |
| Spec score · NoSQL Databases | 9.0 (#4) | 9.4 (#1) |
| Founded | 2006 | 2006 |
| High availability | The storage volume keeps six copies across three Availability Zones and replicas can provide automated failover. | Serverless and Multi-AZ configurations have a 99.99% monthly uptime SLA, while single-AZ configurations have a 99.5% SLA. |
| Rating on G2 | 4.3 out of 5 from 44 reviews | 4.5 out of 5 from 88 reviews |
| Rating on Gartner Peer Insights | 4.3 out of 5 from 15 ratings | 4.0 out of 5 from 1 review |
| Rating on TrustRadius | 5.1 out of 10 from 9 reviews | 8.9 out of 10 from 17 reviews |
| Security | AWS documents VPC isolation, KMS encryption at rest, TLS in transit, IAM/RBAC controls, Secrets Manager and FedRAMP High authorization in GovCloud. | ElastiCache supports encryption in transit and at rest, IAM authentication, Valkey or Redis OSS AUTH, and role-based access control. |
| Serverless scaling | Serverless automatically scales database capacity to workload demand and supports Multi-AZ deployments and read replicas. | ElastiCache Serverless continuously monitors compute, memory, and network use and scales capacity without user capacity planning. |
| Use cases | AWS lists content management, e-commerce, mobile and web applications, and generative and agentic AI applications as use cases. | AWS describes use cases including application data caching, semantic caching, data stores, session stores, and leaderboards. |
| What it does | Amazon DocumentDB is a fully managed cloud document database designed to run MongoDB-compatible applications, drivers and tools. | Amazon ElastiCache is a managed cloud service for deploying, operating, and scaling distributed in-memory caches and data stores. |
Plans
Amazon DocumentDB
- Serverless — StandardPrice not published
- Serverless — I/O-OptimizedPrice not published
- Provisioned On-Demand — StandardPrice not published
- Provisioned On-Demand — I/O-OptimizedPrice not published
- Amazon DocumentDB free trialFree
- Free trialFree
- Amazon DocumentDB Serverless (Standard)$0.08 a month
- Amazon DocumentDB Serverless (I/O-Optimized)$0.09 a month
- DocumentDB I/O-OptimizedPrice not published
- DocumentDB ServerlessPrice not published
Amazon ElastiCache
- AWS Free TierFree
- Backup storage$0.09 a month
- ElastiCache Serverless$6 a month
- ElastiCache Serverless$6 a month
- Database Savings PlansPrice not published
- On-demand nodesPrice not published
In their own words
Amazon DocumentDB
Amazon DocumentDB has no write-up on Specifiction yet; its figures are above.
Amazon ElastiCache
Amazon ElastiCache is a managed caching service compatible with Valkey, Memcached, and Redis OSS, with performance described as microsecond latency. Customers can deploy a serverless cache or a node-based cluster. ElastiCache Serverless monitors compute, memory, and network use and scales vertically and horizontally as demand changes. It replicates data across multiple Availability Zones and offers a 99.99% availability SLA for each cache. Listed uses include application and semantic caching, data and session stores, and leaderboards. It can act as a front-end cache for Amazon RDS, Aurora, DocumentDB, and DynamoDB, and improve performance with EC2 and EMR. Security options include encryption in transit and at rest, IAM authentication, Valkey or Redis OSS AUTH, and role-based access control. CloudWatch provides more than 40 operational metrics at no additional charge. Valkey serverless pricing starts at $6 a month, billed according to stored data in GB-hours and requests measured in ECPUs. Data tiering is unavailable with ElastiCache Serverless.