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Cassandra vs Knack

Cassandra logo

Cassandra

Software

Manage massive amounts of data with linear scalability

From
Free
Rated
-
Full reviewWebsite
K

Knack

Software

Build online databases and apps without code

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Cassandra has a free tier, so it costs nothing to try first.
  • Each has a real cost: Cassandra no support for joins across tables; Knack plans are priced by number of records and objects rather than users, ranging from $110 to $300 per month as data volume grows

Where they differ

Only the attributes on which Cassandra and Knack actually diverge.

Attributes where Cassandra and Knack differ
AttributeCassandraKnack
Starting priceFreeOn request
Pricing modelUnknownsubscription
Free tierYesNo
PlatformsLinux, macOS, Windows, Docker, KubernetesWeb
Founded2008Unknown

Identical on both: 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 Knack

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 Knack
  • Content managementnot Knack
  • User profilesnot Knack
  • Mobile backendsnot Knack
  • Cachingnot Knack

Knack

No use cases recorded yet. See the Knack review.

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

Knack

  • Plans are priced by number of records and objects rather than users, ranging from $110 to $300 per month as data volume grows

Pricing, plan by plan

Cassandra

Free

No published plan breakdown. See the Cassandra review.

Knack

On request

No published plan breakdown. See the Knack review.

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 Knack if

Nothing in the data separates Knack from Cassandra on the points above - pick on price and on how each one feels to use.

Knack review

Questions people ask

Is Cassandra or Knack better?
Neither clearly leads. Cassandra starts at Free and Knack at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cassandra or Knack?
Cassandra has a free tier; the other does not. Paid plans start at Free for Cassandra and On request for Knack.
Does Cassandra or Knack run on more platforms?
Cassandra runs on Linux, macOS, Windows, Docker, Kubernetes. Knack runs on Web.
Can I use Cassandra for free?
Yes. Cassandra has a free tier, so you can try it without paying. Knack starts at On request.
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 Knack is typically brought in for.
What can Cassandra do that Knack 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
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
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