Azure Cosmos DB

Globally distributed multi-model database on Azure

Managed Databases ETL & Data Pipelines Serverless Databases

4.2(78 across the web)

What is Azure Cosmos DB?

Azure Cosmos DB is a managed databases tool. Cosmos DB is Microsoft's globally distributed database. Deploy across Azure regions, and data replicates automatically with consistency levels you choose. Scale throughput on demand without schema migrations. Multiple APIs—SQL, MongoDB, Cassandra, Gremlin—let you use familiar interfaces. Latency stays low worldwide because data lives close to users. Key capabilities: Multi-model database, Global distribution, Multiple APIs, SLA guarantees, Serverless. Azure Cosmos DB is paid-only, with most plans including a trial period. Buyers most often compare Azure Cosmos DB against SurrealDB, Yugabyte, CrateDB.

TL;DR - Azure Cosmos DB

Azure Cosmos DB is a globally distributed NoSQL database with multiple consistency models
It provides single-digit millisecond latency and automatic scaling worldwide
Free tier with 1000 RU/s, then pay per throughput provisioned

Pricing: Paid only

Best for: Enterprises & pros

4.2/5 across review platforms

Pros & Cons

Pros

Multi-model database
Global distribution
Multiple consistency levels
Serverless option
Good for geo-distributed apps

Cons

Expensive
Complex pricing (RUs)
Vendor lock-in
Learning curve
Some limitations per model

Ratings Across the Web

4.2(78 reviews)

Ratings aggregated from independent review platforms. Learn more

Key Features

Multi-model databaseGlobal distributionMultiple APIsSLA guaranteesServerlessAzure

Pricing Plans

Free Trial

Free Tier

Usage-based pricing

1000 RU/s provisioned
25 GB storage
First account free
All features

Serverless

$0.25/per 1M RUs

Intermittent traffic

Pay per request
Auto-scaling
No minimum
Dev/test workloads

Provisioned

$0.008/per 100 RU/s/hour

Predictable workloads

Reserved capacity
Up to 65% savings
Autoscale option
Production ready

View full pricing

About Azure Cosmos DB

LCLouis CorneloupUpdated Apr 29, 2026

Cosmos DB is Microsoft's globally distributed database. Deploy across Azure regions, and data replicates automatically with consistency levels you choose. Scale throughput on demand without schema migrations. Multiple APIs—SQL, MongoDB, Cassandra, Gremlin—let you use familiar interfaces. Latency stays low worldwide because data lives close to users. Applications requiring global scale and availability choose Cosmos DB when multi-region complexity shouldn't be the application's problem.

How we evaluate tools →Source: azure.microsoft.com

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Best Azure Cosmos DB Alternatives

Top alternatives based on features, pricing, and user needs.

View full list →

SurrealDBFreemium

The ultimate multi-model database for AI agents, simplifying your stack and accelerating development.

YugabyteFreemium

AI-ready, distributed, PostgreSQL-compatible database for modern cloud-native applications.

CrateDBFreemium

Real-time analytics database for instant insights from any data, at any scale, with SQL.

HydraFreemium

Serverless analytics on Postgres with sub-second response times and automatic autoscaling.

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Azure Cosmos DB FAQ

Is Cosmos DB free?

Free tier includes 1000 RU/s and 25GB storage forever. Good for development. Production costs vary based on throughput and storage.

What is Azure Cosmos DB?

Cosmos DB is Microsoft's globally distributed, multi-model database. Document, key-value, graph, and column-family in one service. Single-digit millisecond latency worldwide.

How does Cosmos DB pricing work?

Request Units (RUs) for throughput plus storage. Serverless mode for sporadic workloads. Provisioned for predictable traffic. Can be expensive at scale.

Cosmos DB vs DynamoDB?

Cosmos DB is multi-model with SQL API. DynamoDB is simpler key-value. Cosmos DB has global distribution built-in. DynamoDB cheaper for simple use cases.

What APIs does Cosmos DB support?

SQL (document), MongoDB, Cassandra, Gremlin (graph), and Table. Use familiar APIs with Cosmos DB backend. SQL API is most feature-rich.

Source: azure.microsoft.com