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Cassandra

Manage massive amounts of data with linear scalability

As of 30 August 2026, Cassandra is free to use. Apache Cassandra is an open source NoSQL distributed database trusted by thousands of companies for scalability and high availability. Softwr lists it under Databases. Cassandra is made by Apache Software Foundation, launched in 1999, available on Linux, macOS, Windows, Self-hosted.

Overview

What Cassandra does

Apache Cassandra is an open source NoSQL distributed database trusted by thousands of companies for scalability and high availability. It offers linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure, making it the perfect platform for mission-critical data.

What people use it for

  • Real-time applications
  • Content management
  • User profiles
  • Mobile backends
  • Caching

The honest half

Where it falls short

Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Cassandra.

  • No support for joins across tables
  • No ACID transactions across multiple rows
  • Data model must be designed around query patterns upfront, making schema evolution difficult
  • Partition key misconfigurations can cause uneven data distribution and hotspots that degrade performance

Cross-shopped

What people choose instead of Cassandra

Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.

  • Cassandra logo
    Cassandra
    vs
    DynamoDB logo
    DynamoDB

    DynamoDB: AWS-managed distributed NoSQL database with similar scale-out architecture and high write throughput, but as a proprietary cloud service.

  • Cassandra logo
    Cassandra
    vs
    CouchDB logo
    CouchDB

    CouchDB: Open source distributed database with peer-to-peer replication model and eventual consistency like Cassandra, supporting offline-first applications.

  • Cassandra logo
    Cassandra
    vs
    Elasticsearch logo
    Elasticsearch

    Elasticsearch: Distributed search and analytics engine built on peer-to-peer architecture for similar large-scale data workloads.

  • Cassandra logo
    Cassandra
    vs
    Couchbase logo
    Couchbase

    Couchbase: Distributed NoSQL database designed for high performance, supporting both document and key-value storage with multi-datacenter replication.

  • Cassandra logo
    Cassandra
    vs
    ClickHouse logo
    ClickHouse

    ClickHouse: Distributed columnar database optimized for analytical queries at scale with strong compression and performance.

  • Cassandra logo
    Cassandra
    vs
    Firebase Realtime Database logo
    Firebase Realtime Database

    Firebase Realtime Database: Google's managed cloud NoSQL database for real-time applications, offering simpler operational model but less flexibility than Cassandra.

Capabilities

Features

  • Linear Scalability

  • Fault Tolerance

  • Multi-datacenter Replication

  • Tunable Consistency

  • CQL Query Language

  • Distributed Architecture

  • No Single Point of Failure

  • DataStax

    Integration with DataStax

  • Apache Spark

    Integration with Apache Spark

  • Apache Kafka

    Integration with Apache Kafka

  • Presto

    Integration with Presto

  • cqlsh

    Integration with cqlsh

Answered, with sources

Questions people ask

Each answer names the page it came from, so you can check it rather than take our word for it.

Does Cassandra support joins between tables?

No. Cassandra does not support joins or foreign keys. The data model requires denormalization, meaning data must be duplicated across tables to support different query patterns.

Source
Does Cassandra offer ACID transactions?

No. Cassandra provides only row-level atomicity and isolation, not full ACID transactions across multiple rows or tables. It uses lightweight transactions via Paxos for per-row compare-and-set operations.

Source
What programming languages can connect to Cassandra?

Cassandra supports official drivers for multiple languages including Python, Java, Node.js, and Go, allowing applications to communicate via the native Cassandra protocol.

Source
Can I deploy Cassandra in the cloud?

Yes. Cassandra can run on any cloud platform (AWS, Google Cloud, Azure) via Docker, virtual machines, or managed services like DataStax Astra DB, which provides a fully managed DBaaS option.

Source
Does Cassandra have a free option?

The open source Apache Cassandra is free. DataStax also offers Astra DB with a free tier providing up to 25GB storage and 25 million read/write operations per month.

Source

Behind it

Who makes Cassandra

Company
Apache Software Foundation
Based in
Wakefield, Massachusetts
Founders
Avinash Lakshman, Prashant Malik

Timeline

Cassandra over time

  1. Acquisition2025-05-28

    IBM completes acquisition of DataStax

    Source
  2. Launch2009-03-01

    Cassandra becomes Apache Incubator project

    Source
  3. Launch2008-07-01

    Cassandra released as open source on Google Code

    Source
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Keep looking

Where to go from Cassandra

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Softwr does not host reviews and shows no star rating for Cassandra, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.

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