Apache Cassandra vs Azure Cosmos DB for Apache Cassandra

Apache Cassandra9.3Visit Azure Cosmos DB for Apache Cassandra9.0Visit

Higher score Apache Cassandra #1 in Wide-Column Databases 9.3/10 Open source ✓ 3 of 3 features Try Apache Cassandra

vs

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

• Apache Cassandra fits best

  Mature self-hosted Cassandra-compatible deployments

• Azure Cosmos DB for Apache Cassandra fits best

  Cassandra workloads needing managed global distribution

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Side by side

Feature	Apache Cassandra 9.3/10 Visit ↗	Azure Cosmos DB for Apache Cassandra 9.0/10 Visit ↗
At a glance
Editor score	9.3	9.0
Ranking	#1 in Wide-Column Databases	#3 in Wide-Column Databases
Best for	Mature self-hosted Cassandra-compatible deployments	Cassandra workloads needing managed global distribution
Pricing model	Free	Free plan + paid
Starting price	Open source	—
Free plan	Not checked yet	✓ (best)
Free trial	—	30 days
Deployment	Self-hosted, Desktop	Cloud
Platforms	Web, Windows, macOS, Linux	Web
Support	Community, Docs	Community, Docs
Built for	Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Apache Cassandra 3/3 · Azure Cosmos DB for Apache Cassandra 3/3
Multi-region support	✓	✓
Transaction support	✓	✓
Horizontal scaling	✓	✓
Specs
Deployment model	Self_hosted	Managed
Query interface	Cql	Cql
Consistency controls	Tunable	Configurable
Maximum row size	Not checked yet	2 MB
Our review
Pros	Partitioned wide-column model with CQL query access Datacenter replication and tunable consistency controls Horizontal scaling by adding nodes	CQL v3.11, Cassandra driver, and tool compatibility Multi-region distribution and writes with five consistency levels Managed scaling, backups, partitioning, and automatic indexing
Cons	Self-managed deployment requires infrastructure ownership CQL is the primary query interface Desktop deployment uses Docker on supported operating systems	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
Our verdict	Apache Cassandra is an open-source, distributed NoSQL database built around a partitioned wide-column storage model. It is aimed at teams managing self-hosted workloads that need high-volume reads and writes, large datasets, fault… Read the review →	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 →

Strengths and trade-offs

• Apache Cassandra — where it wins

  • Partitioned wide-column model with CQL query access
  • Datacenter replication and tunable consistency controls
  • Horizontal scaling by adding nodes

  Where it doesn't

  • Self-managed deployment requires infrastructure ownership
  • CQL is the primary query interface
  • Desktop deployment uses Docker on supported operating systems

• 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

• Apache Cassandra9.3/10 · Open source

  A mature self-hosted Cassandra-compatible database for distributed, high-volume workloads.

  Try Apache CassandraFull verdict →
• 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 →