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Apache Cassandra

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Spec score 8.9 #1 of 22 in Wide-Column Databases

What it is

Apache Cassandra is a free, open-source NoSQL distributed database for mission-critical data and large active datasets. Its masterless architecture gives each node the same functionality. The project says read and write throughput can grow linearly as machines are added, without downtime or application interruption. Cassandra can run on premises, with one cloud provider, across multiple providers, or in a combination of those environments. It supports replication across data centers and configurable consistency levels for queries, along with CQL, transactions, and horizontal scaling. The project lists audit logging for DML, DDL, and DCL activity, and fqltool for recording and replaying production workloads. Drivers are available for Java, Go, Python, and Node.js; downloads include tarballs and packages, and installation guidance covers Debian and RPM. The ecosystem includes tools and connectors for Apache Kafka, Apache Flink, Apache Spark, and Kubernetes. The project identifies version 5.0 as the latest GA release and says it is maintained until the 8.0 release. Cassandra is self-managed, and listed third-party ecosystem projects are not supported by its community.

Spec sheet

What it does
Apache Cassandra is an open-source distributed NoSQL database using a partitioned wide-column model with eventual consistency.Read 14 Oct 2026 · cassandra.apache.org
Product
Apache Cassandra is an open source NoSQL distributed database.Read 30 Sep 2026 · cassandra.apache.org
Deployment
Cassandra can run on premises, with one cloud provider, across multiple cloud providers, or in a combination of these environments.Read 30 Sep 2026 · cassandra.apache.org
Integrations
The ecosystem page lists connectors and tools for Apache Kafka, Apache Flink, Apache Spark, and Kubernetes.Read 30 Sep 2026 · cassandra.apache.org
License
The Cassandra repository identifies Apache-2.0 as its license, and ASF lists Apache License 2.0 as its current software license.Read 14 Oct 2026 · github.com
Founded
2008Read 23 Sep 2026 · cassandra.apache.org
Maker
The Apache Software Foundation is the nonprofit organization behind Apache Cassandra.Read 14 Oct 2026 · linkedin.com
Architecture
Cassandra has a masterless architecture in which every node can provide the same functionality.Read 30 Sep 2026 · cassandra.apache.org
Audit logging
The project says audit logging records DML, DDL and DCL activity with limited workload impact.Read 14 Oct 2026 · cassandra.apache.org
Caching and indexes
G2 describes built-in caching, denormalization support, materialized views and column indexes in Cassandra's data model.Read 14 Oct 2026 · g2.com
Cassandra Query Language
CQL is an SQL-like language for defining schema and accessing data, with keyspaces, tables, rows and columns.Read 14 Oct 2026 · cassandra.apache.org
Client drivers
Official downloads list Java, Go, Python, Node.js and other language drivers, with Java, Go and Node.js release artifacts linked.Read 14 Oct 2026 · cassandra.apache.org
Community support
The repository directs users to ASF Slack, user and developer mailing lists, community pages and contribution documentation.Read 14 Oct 2026 · github.com
Company facts
LinkedIn lists ASF headquarters in Wilmington, Delaware, founded in 1999, with a stated company size of 5,001–10,000 employees.Read 14 Oct 2026 · linkedin.com
Consistency model
Cassandra prioritizes availability and partition tolerance, normally providing eventual consistency while offering linearizable lightweight transactions through Paxos.Read 14 Oct 2026 · cassandra.apache.org
Developer documentation
The documentation covers getting started, architecture, data modeling, CQL, configuration, operations, tools, vector search, troubleshooting and native protocols.Read 14 Oct 2026 · cassandra.apache.org
Drivers
The download page lists Cassandra drivers for Java, Go, Python, and Node.js.Read 30 Sep 2026 · cassandra.apache.org
Fault tolerance
Cassandra uses identical nodes without single points of failure and supports operation through datacenter outages.Read 14 Oct 2026 · cassandra.apache.org
Installation
The project provides Cassandra downloads as tarballs and packages, and documents Debian and RPM installation.Read 30 Sep 2026 · cassandra.apache.org
Installation options
Official installation methods include Docker, tarball binaries, Debian packages and RPM/YUM packages.Read 14 Oct 2026 · cassandra.apache.org
Integration listings
GetApp lists 22 integrations, including Datadog, New Relic, DbVisualizer, ClicData, Grafana and Sematext Cloud.Read 14 Oct 2026 · getapp.com
Intended use
The project describes Cassandra as a platform for mission-critical data and large active datasets.Read 30 Sep 2026 · cassandra.apache.org
Java SDK
The Java driver is a tunable client library using Cassandra's binary protocol and CQL v3.Read 14 Oct 2026 · github.com
Latest release
The download page lists Cassandra 5.0.9 as the latest GA release, dated 2026-08-07.Read 14 Oct 2026 · cassandra.apache.org
Limit: learning curve
G2 and GetApp reviewers describe a steep learning curve, especially for distributed architecture, compaction and data modeling.Read 14 Oct 2026 · g2.com
Limit: operational complexity
GetApp reviewers describe Cassandra as complex to set up and maintain and requiring substantial expertise.Read 14 Oct 2026 · getapp.com
Limit: relational features
TrustRadius reviewers say Cassandra lacks joins, referential integrity and convenient ad-hoc aggregation queries.Read 14 Oct 2026 · trustradius.com
Limit: storage overhead
G2 reviewers report that denormalized designs can consume much more storage and require new tables for different query needs.Read 14 Oct 2026 · g2.com
Linear scalability
The project states that read and write throughput increase linearly as machines are added.Read 14 Oct 2026 · cassandra.apache.org
Multi-datacenter replication
Its architecture supports full multi-primary replication and replicas distributed across datacenters.Read 14 Oct 2026 · cassandra.apache.org
Praise: integrations
TrustRadius reviewers highlight integration with Hadoop, Spark and Solr, along with low-latency high-throughput performance.Read 14 Oct 2026 · trustradius.com
Praise: replication
GetApp user data rates data replication and support for multiple programming languages 4.4 out of 5.Read 14 Oct 2026 · getapp.com
Praise: scalability and availability
G2 reviewers repeatedly praise high availability, scalability, massive-data handling and fast writes.Read 14 Oct 2026 · g2.com
Production hardware guidance
The hardware guide says a minimal production server needs at least two CPU cores and 8 GB RAM, while typical servers use eight or more cores and 32 GB RAM.Read 14 Oct 2026 · cassandra.apache.org
Rating on Capterra
4.2 out of 5 from 33 reviews.Read 14 Oct 2026 · capterra.com
Rating on G2
4.1 out of 5 from 35 reviews.Read 14 Oct 2026 · g2.com
Rating on GetApp
4.2 out of 5 from 33 reviews.Read 14 Oct 2026 · getapp.com
Rating on Software Advice
4.2 out of 5 from 33 reviews.Read 14 Oct 2026 · softwareadvice.com
Rating on TrustRadius
9 out of 10 from 95 reviews and ratings.Read 14 Oct 2026 · trustradius.com
Recent 5.0 features
Cassandra 5.0 adds Storage Attached Indexes, trie memtables, trie SSTables, JDK 17 support and more guardrails.Read 14 Oct 2026 · cassandra.apache.org
Release support
The download page identifies Cassandra 5.0 as the latest GA version and says it is maintained until the 8.0 release.Read 30 Sep 2026 · cassandra.apache.org
Replication
Cassandra supports replication across multiple data centers and configurable consistency levels for queries.Read 30 Sep 2026 · cassandra.apache.org
Runtime requirements
Cassandra 5.0 documentation requires Java 11 or 17 and Python 3.8 through 3.13 for cqlsh.Read 14 Oct 2026 · cassandra.apache.org
Scaling
The project says read and write throughput increase linearly as machines are added, without downtime or application interruption.Read 30 Sep 2026 · cassandra.apache.org
Schema flexibility
The official architecture describes flexible schema and partition-key-oriented queries rather than relational joins.Read 14 Oct 2026 · cassandra.apache.org
Security and observability
The project lists audit logging for DML, DDL, and DCL activity, and fqltool for capturing and replaying production workloads.Read 30 Sep 2026 · cassandra.apache.org
Security controls
Cassandra provides TLS/SSL encryption, client authentication and authorization, but these protections are disabled in the default configuration.Read 14 Oct 2026 · cassandra.apache.org
Supported Linux distributions
Documented distributions include AlmaLinux, Amazon Linux, Debian, RHEL, SUSE Enterprise Linux and Ubuntu.Read 14 Oct 2026 · cassandra.apache.org
Vulnerability reporting
The Apache Security Team asks that potential vulnerabilities be reported privately before public disclosure.Read 30 Sep 2026 · apache.org

Plans and prices

Apache Cassandra Free Open source NoSQL distributed database · self-managed Read 30 Sep 2026 · cassandra.apache.org
Apache Cassandra Free Open-source database · self-hosted Read 14 Oct 2026 · getapp.com

Every Apache Cassandra plan and price →

Strong points and limits

Strong points

  • Masterless design gives each node the same functionality.
  • Supports replication across multiple data centers.
  • Offers tunable consistency and CQL querying.
  • Drivers listed for Java, Go, Python, and Node.js.
  • Can be deployed across on-premises and cloud environments.

Limits

  • Cassandra is self-managed.
  • Third-party ecosystem projects are not supported by its community.
  • Potential vulnerabilities should be reported privately before public disclosure.

Who it suits

Cassandra suits teams managing large active datasets who need a self-managed distributed database and control over deployment and consistency. Its documented drivers and ecosystem tools may be useful for teams working with the listed languages and integrations.

Apache Cassandra in depth

Read the full write-up

Overview

Apache Cassandra is a self-managed, open-source NoSQL database for large active datasets and mission-critical workloads. It is best suited to teams that need to distribute data across machines or data centers and can operate their own database infrastructure.

Its masterless design and horizontal scaling aim to let a cluster grow without downtime, but Cassandra puts deployment and day-to-day management in the team's hands. That makes it a stronger fit for organizations with database operations capacity than for teams seeking a managed service.

For category browsing, see Wide-Column Databases and Database Software.

Key features

Masterless architecture: Any node can provide the same functionality. This avoids a designated master role, a useful foundation for distributed deployments.

Horizontal scaling: The project says read and write throughput increase linearly as machines are added, without downtime or application interruption. That is attractive for growing active datasets, though the promise does not remove the need to manage the cluster.

Deployment flexibility: Run Cassandra on premises, with one cloud provider, across several providers, or in a combination of environments. Teams can align deployment with their infrastructure, at the cost of owning the operational work.

Replication and query consistency: Replication across data centers and tunable consistency levels give teams control over data distribution and query behavior. Cassandra also supports transactions, though the available facts do not define their scope.

Operations and security: Audit logging covers DML, DDL, and DCL activity; fqltool can capture and replay production workloads. These tools support auditing and workload analysis, but do not substitute for operating the database.

Integration and drivers: The ecosystem includes connectors and tools for Apache Kafka, Apache Flink, Apache Spark, and Kubernetes. Drivers are available for Java, Go, Python, and Node.js, giving teams several common integration paths.

Installation and releases: Downloads include tarballs and packages, with Debian and RPM installation documentation. Cassandra 5.0 is identified as the latest GA release and is maintained until the 8.0 release.

Pricing

Apache Cassandra — free. The plan is an open-source NoSQL distributed database that is self-managed. There is no paid Cassandra plan in the pricing model given; the tradeoff for the zero license price is that teams must manage deployment and operations themselves.

The project asks that potential vulnerabilities be reported privately to the Apache Security Team before public disclosure. Community support does not extend to listed third-party ecosystem projects, tools, products, or services, so teams relying on those should account for separate support arrangements.

Platforms

Cassandra is listed for Linux, macOS, Windows, web, and self-hosted use. The deployment options include on-premises and cloud environments, including multi-cloud combinations. It uses CQL as its query interface and supports multi-region deployments.

Who it's for

Cassandra suits teams with large active datasets, mission-critical workloads, and a need to scale horizontally or replicate across data centers. It is particularly relevant when infrastructure must span on-premises and cloud environments, or multiple cloud providers.

It is a less natural choice for teams that want a vendor-managed database or do not have capacity to manage a distributed system. Teams depending on third-party ecosystem projects should also distinguish those projects' support from Cassandra community support.

Pros and cons

Pro: Distributed growth path. The masterless architecture and claimed linear read and write throughput growth make adding machines central to Cassandra's scaling model.

Pro: Deployment and replication control. On-premises, single-cloud, multi-cloud, and mixed deployments are supported, with replication across data centers and tunable query consistency.

Pro: No license charge. The open-source plan costs nothing, which avoids a software license fee.

Con: Self-management is required. Teams take responsibility for operating the database rather than buying a managed Cassandra plan.

Con: Ecosystem support has boundaries. The Cassandra community does not support the listed third-party projects, tools, products, or services.

Alternatives

Azure Cosmos DB for NoSQL is worth considering for readers looking for a freemium option with a free tier and free trial; its free tier includes 1,000 RU/s, 25 GB storage, and one free-tier account per Azure subscription.

Google Cloud Bigtable is a paid alternative with a free trial and Enterprise and Enterprise Plus editions; consider it when those editions suit your requirements better than self-managed Cassandra.

Azure Application Insights is a paid, usage-based option with the first 5 GB/month of data ingestion free per billing account, and may suit readers seeking that billing model rather than a self-managed database.

Amazon Keyspaces offers on-demand and provisioned capacity plans; consider it when a paid capacity-based alternative is preferable to operating Cassandra yourself.

HPE Ezmeral Data Fabric is a paid alternative with reseller-variable pricing and 1-year to 5-year E-LTU offerings; it may suit teams considering a commercial data fabric instead.

SWC-DB is another free, self-hosted option; its GPLv3 licensing makes it worth evaluating if that project is a better fit for your requirements.

Apache HBase is a free, open-source distributed database whose operators configure and manage deployments, making it a direct alternative to assess alongside Cassandra.

Tencent Cloud API Gateway is a paid API gateway with a first-year allowance of 1 million API calls per month free; consider it for API gateway needs rather than Cassandra's database role.

Verdict

Choose Apache Cassandra if your team needs a free, horizontally scalable distributed database, values deployment and replication control, and can take responsibility for operating it. Look elsewhere if managed operations or support for third-party ecosystem components is a deciding requirement.

Verdict

Cassandra offers a free, distributed database with multiple deployment options and controls for replication and query consistency. Teams should account for self-management and distinguish community support for Cassandra from support for third-party ecosystem projects.

Where Specifiction places it

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