DocumentDB vs DynamoDB

Amazon DynamoDB and Amazon DocumentDB are both fully managed NoSQL databases on AWS, but they are built for entirely different data models and architectural needs.

• Choose DynamoDB if you need predictable, single-digit millisecond latency at virtually limitless scale, have well-defined access patterns, and want a truly serverless database.
• Choose DocumentDB if your data features complex, deeply nested JSON structures, you require powerful ad-hoc queries or aggregation pipelines, or you are migrating an existing MongoDB workload.