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Cassandra vs Tana

Cassandra logo

Cassandra

Software

Manage massive amounts of data with linear scalability

From
Free
Rated
-
Full reviewWebsite
Tana logo

Tana

Software

The everything app for your personal workspace

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Cassandra no support for joins across tables; Tana the free plan hosts only 5 meetings a month with AI transcripts and summaries
  • They diverge on capability: Cassandra covers Linear Scalability, Tana covers Outliner interface.

Where they differ

Only the attributes on which Cassandra and Tana actually diverge.

Attributes where Cassandra and Tana differ
AttributeCassandraTana
Pricing modelUnknownfreemium
PlatformsLinux, macOS, Windows, Docker, KubernetesWeb, Desktop
Founded20082020

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 Tana

  • Outliner interface
  • Supertags
  • Live queries
  • AI integration
  • Graph views
  • Email capture
  • API
  • Zapier

What people use each for

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

Cassandra

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

Tana

  • Structured note taking with a graph based supertag data modelnot Cassandra
  • Automatic meeting capture with AI transcripts and summariesnot Cassandra
  • Turning notes into queryable structured databasesnot 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

Tana

  • The free plan hosts only 5 meetings a month with AI transcripts and summaries
  • The free plan connects only 1 calendar and allows 50 AI queries
  • Pro is $30 per user per month at standard price, with $20 shown as an early bird rate
  • Max is $120 per user per month at standard price, with $80 shown as an early bird rate
  • Integrations and full MCP require the Pro plan
  • Dedicated support and onboarding, and unlimited agents, skills and types, require the Max plan
  • The Business plan is custom priced, billed yearly and has no published rate
  • The free trial runs 30 days

Pricing, plan by plan

Cassandra

Free

No published plan breakdown. See the Cassandra review.

Tana

Free
  • FreeFree
    • Core features
    • Supertags
    • Searches
  • Pro$10/month
    • Advanced AI
    • Priority support
    • Extended history

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 Tana if

  • You need outliner interface.
  • You want to start without paying.
  • You work on Web, Desktop.
  • You also want supertags.
Tana review

Questions people ask

Is Cassandra or Tana better?
Neither clearly leads. Cassandra starts at Free and Tana at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cassandra or Tana?
Cassandra starts at Free and Tana at Free.
Does Cassandra or Tana run on more platforms?
Cassandra runs on Linux, macOS, Windows, Docker, Kubernetes. Tana runs on Web, Desktop.
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 Tana is typically brought in for.
What can Cassandra do that Tana cannot?
Cassandra covers Linear Scalability, Fault Tolerance, Multi-datacenter Replication, Tunable Consistency. Tana covers Outliner interface, Supertags, Live queries, AI integration.

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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