Softwr

Software · head to head

Cassandra vs Neo4j

Cassandra logo

Cassandra

Software

Manage massive amounts of data with linear scalability

From
Free
Rated
-
Full reviewWebsite
Neo4j logo

Neo4j

Software

The world's leading graph database

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Cassandra no support for joins across tables; Neo4j auraDB Free has no service availability SLA, no backups and no point-in-time recovery
  • They diverge on capability: Cassandra covers Linear Scalability, Neo4j covers Native Graph Storage.

Where they differ

Only the attributes on which Cassandra and Neo4j actually diverge.

Attributes where Cassandra and Neo4j differ
AttributeCassandraNeo4j
Pricing modelUnknownfreemium
PlatformsLinux, macOS, Windows, Docker, KubernetesLinux, Windows, Mac, Docker, Web
Founded20082007

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Cassandra

  • Linear Scalability
  • Fault Tolerance
  • Multi-datacenter Replication
  • Tunable Consistency
  • CQL Query Language
  • Distributed Architecture
  • No Single Point of Failure
  • DataStax

Only in Neo4j

  • Native Graph Storage
  • Cypher Query Language
  • ACID Transactions
  • High Availability
  • Graph Data Science
  • Full-text Search
  • Native Indexes
  • GraphQL

Both cover

  • Apache Spark
  • Linux support
  • Windows support
  • Mac support
  • Docker support

What people use each for

The jobs each tool is most often brought in to do.

Cassandra

  • Real-time applicationsnot Neo4j
  • Content managementnot Neo4j
  • User profilesnot Neo4j
  • Mobile backendsnot Neo4j
  • Cachingnot Neo4j

Neo4j

  • Running a managed graph database on AWS, Azure or Google Cloudnot Cassandra
  • Building knowledge graphs and GraphRAG retrieval for AI applicationsnot Cassandra
  • Fraud detection, recommendations and supply chain analysis over connected datanot Cassandra

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

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

Neo4j

  • AuraDB Free has no service availability SLA, no backups and no point-in-time recovery
  • AuraDB Free imposes limits on node and relationship counts and runs single-zone only
  • SSO authentication and role-based access control are excluded from AuraDB Free and AuraDB Professional, starting only at Business Critical at $146 per GB per month with a 2GB minimum cluster
  • AuraDB Professional starts at $65 per GB per month with a minimum 1GB cluster and caps at 128GB memory per instance
  • AuraDB Professional backups are daily with only 7-day retention, against 30 days on Business Critical
  • Customer managed keys and private endpoints are available only on AuraDB Virtual Dedicated Cloud, which is quote only with no published price
  • Change data capture, query log forwarding, secondaries and access to Neo4j Professional Services are excluded below the Business Critical tier
  • Support on AuraDB Free is community only and AuraDB Professional is best effort, with 24x7 one-hour response starting at Business Critical
  • AuraDB Virtual Dedicated Cloud is sold on prepaid contract terms with enterprise commercial negotiation rather than self-serve card payment

Pricing, plan by plan

Cassandra

Free

No published plan breakdown. See the Cassandra review.

Neo4j

Free
  • CommunityFree
    • Single database
    • Cypher queries
    • APOC library
  • AuraDB FreeFree
    • 50K nodes
    • 175K relationships
    • Cloud hosted
  • AuraDB Professional$65/month
    • Dedicated instance
    • Auto-scaling
    • Enterprise support

Which should you pick?

Choose Cassandra if

  • You need linear scalability.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Docker, Kubernetes.
  • You also want fault tolerance.
Cassandra review

Choose Neo4j if

  • You need native graph storage.
  • You want to start without paying.
  • You work on Linux, Windows, Mac, Docker, Web.
  • You also want cypher query language.
Neo4j review

Questions people ask

Is Cassandra or Neo4j better?
Neither clearly leads. Cassandra starts at Free and Neo4j at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cassandra or Neo4j?
Cassandra starts at Free and Neo4j at Free.
Does Cassandra or Neo4j run on more platforms?
Cassandra runs on Linux, macOS, Windows, Docker, Kubernetes. Neo4j runs on Linux, Windows, Mac, Docker, Web.
Can I use Cassandra for free?
Both have a free tier, so you can try either at no cost before committing.
What is Cassandra best used for?
Cassandra is most often used for real-time applications, content management, user profiles, mobile backends. Of those, real-time applications and content management are not what Neo4j is typically brought in for.
What can Cassandra do that Neo4j cannot?
Cassandra covers Linear Scalability, Fault Tolerance, Multi-datacenter Replication, Tunable Consistency. Neo4j covers Native Graph Storage, Cypher Query Language, ACID Transactions, High Availability. Both handle Apache Spark, Linux support, Windows support, Mac support.

Answered from the vendors’ own pages

Cassandra: 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
Cassandra: 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
Cassandra: 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
Cassandra: 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
Cassandra: 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
ShareXLinkedInRedditWhatsAppEmail

Related pages

More on Cassandra

More on Neo4j

Keep looking

Other head to heads