Amazon DynamoDB vs Azure Cosmos DB: Which is Better in 2026?
Choosing between Amazon DynamoDB and Azure Cosmos DB comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Bottom line: Amazon DynamoDB is our overall pick for data & databases workflows. Pick Azure Cosmos DB if you need its specific feature set.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Amazon DynamoDB
Serverless NoSQL database with single-digit millisecond latency
Best for you if:
- • Amazon DynamoDB is a serverless NoSQL database designed for applications requiring single-digit millisecond latency
- • It scales automatically to handle any workload with built-in security and backup capabilities
Azure Cosmos DB
Globally distributed multi-model database on Azure
Best for you if:
- • Azure Cosmos DB is a globally distributed NoSQL database with multiple consistency models
- • It provides single-digit millisecond latency and automatic scaling worldwide
| At a Glance |  Amazon DynamoDB |  Azure Cosmos DB |
|---|---|---|
Starts at | $1.25/1M writesOn-Demand | $0.25/1M RUsServerless |
Best For | Data & Databases | Data & Databases |
Rating | - | - |
Choose Amazon DynamoDB or Azure Cosmos DB?
Choose Amazon DynamoDB if
Serverless NoSQL database with single-digit millisecond latency
- Fully managed NoSQL
- Single-digit millisecond latency
- Scales automatically
Choose Azure Cosmos DB if
Globally distributed multi-model database on Azure
- Multi-model database
- Global distribution
- Multiple consistency levels
- Budget matters ($0.25/1M RUs vs $1.25/1M writes)
| Feature | Amazon DynamoDB | Azure Cosmos DB |
|---|---|---|
| Pricing Model | Paid | Paid |
| User Rating | ★4.4/5 545 reviews | ★4.2/5 78 reviews |
| Categories | Data & DatabasesCloud & Infrastructure | Data & DatabasesCloud & Infrastructure |
In-Depth Analysis
Amazon DynamoDB
Serverless NoSQL database with single-digit millisecond latency
Strengths
- +Fully managed NoSQL
- +Single-digit millisecond latency
- +Scales automatically
- +Serverless option
- +Global tables
Weaknesses
- -Pricing complex
- -Query limitations
- -No joins or complex queries
- -Vendor lock-in
- -Learning curve for data modeling
Key features
Azure Cosmos DB
Globally distributed multi-model database on Azure
Strengths
- +Multi-model database
- +Global distribution
- +Multiple consistency levels
- +Serverless option
- +Good for geo-distributed apps
Weaknesses
- -Expensive
- -Complex pricing (RUs)
- -Vendor lock-in
- -Learning curve
- -Some limitations per model
Key features
Pricing: Amazon DynamoDB vs Azure Cosmos DB
| Plan | Amazon DynamoDB | Azure Cosmos DB |
|---|---|---|
| Tier 1 | Free Tier | Free Tier |
| Tier 2 | $1.25 /1M writes On-Demand | $0.25 /1M RUs Serverless |
| Tier 3 | $0.00065 /WCU/hour Provisioned | $0.008 /100 RU/s/hour Provisioned |
Pricing verified from each vendor's public pricing page. Compare in detail on Amazon DynamoDB pricing and Azure Cosmos DB pricing.
Who Should Use What?
On a budget?
Both are paid. Compare plans on their websites.
Go with: Amazon DynamoDB
Want the highest-rated option?
Neither has user reviews yet.
Go with: Amazon DynamoDB
Value user reviews?
Neither has user reviews yet.
Go with: Amazon DynamoDB
3 Questions to Help You Decide
What's your budget?
Both are paid. Pricing won't help you decide here.
What's your use case?
Both are data & databases tools. Compare their specific features to decide.
How important are ratings?
Neither has user reviews yet.
Key Takeaways
Amazon DynamoDB
- Higher user rating: 4.4/5 vs 4.2/5
- Larger review base (545 reviews)
- Our pick for this comparison
Azure Cosmos DB
- Choose if you want globally distributed multi-model database on Azure
The Bottom Line
Amazon DynamoDB is our pick.
Frequently Asked Questions
Is Amazon DynamoDB or Azure Cosmos DB better?
Amazon DynamoDB is rated in our evaluation. Both are paid.
What are Amazon DynamoDB and Azure Cosmos DB used for?
Amazon DynamoDB: Serverless NoSQL database with single-digit millisecond latency. Azure Cosmos DB: Globally distributed multi-model database on Azure.
What does Amazon DynamoDB cost vs Azure Cosmos DB?
Amazon DynamoDB is a paid tool. Azure Cosmos DB is a paid tool. Visit their websites for detailed pricing.