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Azure Cosmos DB vs Azure Table Storage

Azure Cosmos DB: Microsoft's globally distributed, multi-API NoSQL and vector database with SLA-backed latency. Azure Table Storage: Cheap, schemaless key-attribute store inside an Azure Storage account.

key differences

  • Azure Cosmos DB is primarily a document database; Azure Table Storage is key-value.
  • Azure Cosmos DB is built for larger datasets (Multi-PB) than Azure Table Storage (≤ 1 PB).
  • Only Azure Cosmos DB has secondary indexes, full-text search, vector search, geospatial, json.

choose azure-cosmos-db for

  • +Globally distributed user and session data
  • +IoT telemetry and device state
  • +Chat history and memory for AI agents
  • +Retail carts, catalogs and personalization

best at · OLTP, IoT, Sessions

choose azure-table-storage for

  • +Application logs and diagnostics
  • +Device and user metadata keyed by ID
  • +Lightweight configuration storage
  • +Cheap archival of structured records

best at · Metadata, IoT, Coordination

Azure Cosmos DBMicrosoft's globally distributed, multi-API NoSQL and vector database with SLA-backed latency.
Azure Table StorageCheap, schemaless key-attribute store inside an Azure Storage account.
overview
Primary model
Document
Key-Value
Also supports
Key-Value, Graph, Wide-Column, Vector, Search Engine
Wide-Column
Type
Managed service
Managed service
Status
Active
Active
Developer
Microsoft
Microsoft
First release
2017
2010
Latest version
–
–
License
ProprietaryProprietary Azure service
ProprietaryProprietary (Azure service)
Free tier
✓
—
popularity
WhichDB Score
45.3
19.7
Rank
#39
#162
GitHub stars
–
–
Stack Overflow questions
7.8K
2.4K
scale & guarantees
Comfortable data size
Massive (Multi-PB)
Large (≤ 1 PB)
Horizontal scaling
Native
Native
Multi-region
Active active
Read replicas
ACID
Limited
Limited
Consistency
Tunable, Strong, Causal, Eventual
Strong
Schema
Schemaless
Schemaless
Architecture
Distributed, Multi primary, Serverless
Distributed, Serverless
deployment
Self-hosted
—
—
Vendor-managed cloud
✓
✓
Serverless
✓
✓
Embedded
—
—
Edge
—
—
Clouds
Azure
Azure
capabilities
Transactions
✓
✓
Joins
—
—
Secondary indexes
✓
—
Full-text search
✓
—
Vector search
✓
—
Geospatial
✓
—
JSON
✓
—
Change data capture
✓
—
Triggers
✓
—
Stored procedures
✓
—
Materialized views
—
—
TTL / expiry
✓
—
Pub/Sub
—
—
Columnar storage
✓
—
In-memory
—
—
Durable persistence
✓
✓
Compression
—
—
Encryption at rest
✓
✓
Role-based access
✓
✓
Time travel
—
—
Branching
—
—
Online schema changes
✓
—
Streaming ingest
—
—
Offline sync
—
—
Runs in WebAssembly
—
—
interfaces
Query languages
Cosmos DB NoSQL (SQL dialect), MongoDB Query API, CQL, Gremlin
OData
Client languages
C#, Java, JavaScript, Python, Go, Rust
C#, .NET, Java, Python, JavaScript, Go
Best for
OLTP, IoT, Sessions, Vector search
Metadata, IoT, Coordination, Observability
Add more to this comparisonNot sure either fits? Try smart match

Azure Cosmos DB vs Azure Table Storage: FAQ

What is the difference between Azure Cosmos DB and Azure Table Storage?

Azure Cosmos DB: Microsoft's globally distributed, multi-API NoSQL and vector database with SLA-backed latency. Azure Table Storage: Cheap, schemaless key-attribute store inside an Azure Storage account. Azure Cosmos DB is primarily a document database; Azure Table Storage is key-value. Azure Cosmos DB is built for larger datasets (Multi-PB) than Azure Table Storage (≤ 1 PB). Only Azure Cosmos DB has secondary indexes, full-text search, vector search, geospatial, json.

When should I choose Azure Cosmos DB over Azure Table Storage?

Choose Azure Cosmos DB for globally distributed user and session data; IoT telemetry and device state; and chat history and memory for AI agents. Choose Azure Table Storage for application logs and diagnostics; device and user metadata keyed by ID; and lightweight configuration storage.

Is Azure Cosmos DB or Azure Table Storage more popular?

Azure Cosmos DB ranks #39 on the WhichDB Score (45.3/100) and Azure Table Storage ranks #162 (19.7/100). Popularity is not fit: check the requirements that matter for your project.

Are Azure Cosmos DB and Azure Table Storage open source?

No. Azure Cosmos DB is proprietary, closed-source software. No. Azure Table Storage is proprietary, closed-source software.