Azure Cosmos DB for Apache Cassandra vs DataStax Astra DB

Azure Cosmos DB for Apache Cassandra9.0Visit DataStax Astra DB8.5Visit

Higher score Azure Cosmos DB for Apache Cassandra #3 in Wide-Column Databases 9.0/10 Free plan · 30-day trial Free planFree trial✓ 3 of 3 features Visit site

vs

DataStax Astra DB #8 in Wide-Column Databases 8.5/10 Free plan Free plan✓ 3 of 3 features Visit Astra DB

• Azure Cosmos DB for Apache Cassandra fits best

  Cassandra workloads needing managed global distribution

• DataStax Astra DB fits best

  Managed Cassandra with vector and hybrid search

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Side by side

Feature	Azure Cosmos DB for Apache Cassandra 9.0/10 Visit ↗	DataStax Astra DB 8.5/10 Visit ↗
At a glance
Editor score	9.0	8.5
Ranking	#3 in Wide-Column Databases	#8 in Wide-Column Databases
Best for	Cassandra workloads needing managed global distribution	Managed Cassandra with vector and hybrid search
Pricing model	Free plan + paid	Free plan + paid
Starting price	—	$83.30/mo
Free plan	✓	✓
Free trial	30 days	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Community, Docs	Tickets, Docs
Built for	Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Azure Cosmos DB for Apache Cassandra 3/3 · DataStax Astra DB 3/3
Multi-region support	✓	✓
Transaction support	✓	✓
Horizontal scaling	✓	✓
Specs
Deployment model	Managed	Managed
Query interface	Cql	Multiple
Consistency controls	Configurable	Configurable
Maximum row size	2 MB	Not checked yet
Our review
Pros	CQL v3.11, Cassandra driver, and tool compatibility Multi-region distribution and writes with five consistency levels Managed scaling, backups, partitioning, and automatic indexing	CQL, HTTP Data API, drivers, and client libraries Vector and hybrid search for AI and retrieval applications Configurable consistency and multi-region replication
Cons	Paid pricing varies by usage and region The free tier applies to one account per Azure subscription The 30-day trial is limited to non-production databases	The Free plan does not include multi-region databases Pay Per Use pricing varies with resource consumption It is a managed service, not an open-source product
Our verdict	Azure Cosmos DB for Apache Cassandra is a fully managed NoSQL database service for running Cassandra workloads in the cloud. It is aimed at teams that need wide-column storage with Cassandra Query Language (CQL) v3.11 compatibility,… Read the review →	DataStax Astra DB is a fully managed, serverless database service powered by Apache Cassandra. It is aimed at developers building distributed applications, real-time workloads, and generative-AI or retrieval-augmented-generation… Read the review →

Strengths and trade-offs

• Azure Cosmos DB for Apache Cassandra — where it wins

  • CQL v3.11, Cassandra driver, and tool compatibility
  • Multi-region distribution and writes with five consistency levels
  • Managed scaling, backups, partitioning, and automatic indexing

  Where it doesn't

  • Paid pricing varies by usage and region
  • The free tier applies to one account per Azure subscription
  • The 30-day trial is limited to non-production databases

• DataStax Astra DB — where it wins

  • CQL, HTTP Data API, drivers, and client libraries
  • Vector and hybrid search for AI and retrieval applications
  • Configurable consistency and multi-region replication

  Where it doesn't

  • The Free plan does not include multi-region databases
  • Pay Per Use pricing varies with resource consumption
  • It is a managed service, not an open-source product

• Azure Cosmos DB for Apache Cassandra9.0/10 · Free plan · 30-day trial

  A managed Cassandra option for globally distributed workloads with CQL compatibility.

  Visit siteFull verdict →
• DataStax Astra DB8.5/10 · Free plan

  Managed Cassandra for distributed apps, with vector and hybrid search.

  Visit Astra DBFull verdict →