Softwr

Database & Data Management · head to head

Cassandra vs Flock

Cassandra logo

Cassandra

Database & Data Management

Manage massive amounts of data with linear scalability

From
Free
Rated
-
Full reviewWebsite
Flock logo

Flock

Communication & Collaboration

Organized team communication platform

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Cassandra no support for joins across tables; Flock the Starter plan only makes the most recent 10,000 messages searchable and caps public channels at 10
  • They diverge on capability: Cassandra covers Linear Scalability, Flock covers Team chat.

Where they differ

Only the attributes on which Cassandra and Flock actually diverge.

Attributes where Cassandra and Flock differ
AttributeCassandraFlock
Pricing modelUnknownsubscription
PlatformsLinux, macOS, Windows, Docker, KubernetesWeb, Windows, Macos, Ios, Android
CategoryDatabase & Data ManagementCommunication & Collaboration
Founded20082014

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

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 Flock

  • Team chat
  • Channels
  • Threads
  • File sharing
  • Polls
  • Integrations
  • Mobile apps
  • Slack

Both cover

  • Windows support

What people use each for

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

Cassandra

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

Flock

  • Team messaging with channels, direct messages and file sharingnot Cassandra
  • Running polls, to-dos and reminders inside a chat workspacenot Cassandra
  • Video conferencing and screen sharing for small teamsnot 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

Flock

  • The Starter plan only makes the most recent 10,000 messages searchable and caps public channels at 10
  • Starter storage is 5 GB for the entire team, against 10 GB per member on Pro and 20 GB per member on Enterprise
  • Starter allows a single team admin and a single approved domain
  • Group video calls and screen sharing require the Pro plan; Starter is limited to 1-1 video calls
  • Group video calls are capped at 20 participants even on Enterprise
  • Single Sign-On and Active Directory sync are Enterprise only
  • Enterprise is quote only, with no published rate, and is positioned for organisations with 100 or more members
  • Unlimited auto-join and announcement channels require Enterprise; Starter and Pro get one of each

Pricing, plan by plan

Cassandra

Free

No published plan breakdown. See the Cassandra review.

Flock

Free
  • FreeFree
    • Unlimited chats
    • Channels
    • File sharing
  • Pro$5/month
    • Everything in Free
    • Advanced search
    • API access

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 Flock if

  • You need team chat.
  • You want to start without paying.
  • You work on Web, Windows, Macos, Ios, Android.
  • You also want channels.
Flock review

Questions people ask

Is Cassandra or Flock better?
Neither clearly leads. Cassandra starts at Free and Flock at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cassandra or Flock?
Cassandra starts at Free and Flock at Free.
Does Cassandra or Flock run on more platforms?
Cassandra runs on Linux, macOS, Windows, Docker, Kubernetes. Flock runs on Web, Windows, Macos, Ios, Android.
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 Flock is typically brought in for.
What can Cassandra do that Flock cannot?
Cassandra covers Linear Scalability, Fault Tolerance, Multi-datacenter Replication, Tunable Consistency. Flock covers Team chat, Channels, Threads, File sharing. Both handle Windows 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
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