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Databases · head to head

Cassandra vs Deno

Cassandra logo

Cassandra

Databases

Manage massive amounts of data with linear scalability

From
Free
Free plan
Yes
Visit CassandraFull review
Deno logo

Deno

Developer Tools

A fast, open-source, fully Node-compatible JS runtime with TypeScript baked right in

From
Free
Free plan
Yes
Visit DenoFull review

The short version

  • Cassandra is free; Deno starts at $20/mo.
  • Where Cassandra falls short: no support for joins across tables.
  • Where Deno falls short: egress bandwidth overage costs $0.20/GB which can become expensive for high-traffic applications.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Cassandra and Deno actually diverge.

Attributes where Cassandra and Deno differ
AttributeCassandraDeno
PlatformsLinux, macOS, Windows, Self-hostedWeb
CategoryDatabasesDeveloper Tools

Identical on both: starting price (Free), free tier (Yes).

Not yet recorded: pricing model for Cassandra, founded for Deno.

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 Deno

Nothing recorded that Cassandra does not also cover.

What people use each for

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

Cassandra

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

Deno

  • Running TypeScript natively without transpilation overheadnot Cassandra
  • Migrating Node.js applications to secure-by-default runtimenot Cassandra
  • Deploying edge functions and serverless containers seamlesslynot Cassandra
  • Consolidating developer tools into single binarynot 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

Deno

  • Egress bandwidth overage costs $0.20/GB which can become expensive for high-traffic applications
  • CPU time overage is $0.10/hour on Pro and Builder tiers, adding to costs for compute-intensive workloads
  • Enterprise pricing is not disclosed; requires sales contact

Pricing, plan by plan

Cassandra

Free

No published plan breakdown. See the Cassandra review.

Deno

Free
  • FreeFree
    • 1 million requests/month
    • 20GB egress bandwidth
    • 10 apps
  • Pro$20/mo
    • 5 million requests/month
    • 200GB egress
    • 50 apps
  • Builder$200/mo
    • 25 million requests/month
    • 2,000GB egress
    • 10,000 apps
  • EnterpriseOn request
    • Custom limits on all metrics
    • 99.95% reliability SLA
    • Email support with SLA

Which should you pick?

Choose Cassandra if

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

Choose Deno if

  • You want to start without paying.
Deno review

Questions people ask

Is Cassandra or Deno better?
Neither clearly leads. Cassandra starts at Free and Deno at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cassandra or Deno?
Cassandra starts at Free and Deno at Free.
Does Cassandra or Deno run on more platforms?
Cassandra runs on Linux, macOS, Windows, Self-hosted. Deno runs on 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 Deno is typically brought in for.
What can Cassandra do that Deno cannot?
Cassandra covers Linear Scalability, Fault Tolerance, Multi-datacenter Replication, Tunable Consistency.

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
Deno: How much does Deno Deploy cost?

Deno Deploy offers a free tier at $0/month, Pro at $20/month, and Builder at $200/month. Enterprise has custom pricing. All plans include base request and bandwidth limits, with overage charges for additional usage.

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
Deno: What are Deno Deploy's overage charges?

Egress bandwidth overages cost $0.20 per GB. CPU time overages are $0.10 per hour on Pro and Builder tiers. Memory time and KV database operations also incur charges beyond included limits.

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
Deno: How many apps can I deploy on Deno's free plan?

The free tier includes 10 apps with up to 1 concurrent build. Pro tier supports 50 apps with 3 concurrent builds, and Builder supports 10,000 apps with 20 concurrent builds.

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
Deno: How many team members can access Deno Deploy?

The free tier supports up to 3 team members. Pro supports 10 team members. Builder supports 25 team members. Enterprise has custom seat limits.

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
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