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Databases · head to head

Apache Kafka vs Confluent Cloud

Apache Kafka logo

Apache Kafka

Databases

Open-source distributed event streaming platform

From
Free
Rated
-
Full reviewWebsite
Confluent Cloud logo

Confluent Cloud

Technology

The data streaming platform built on Apache Kafka, delivered as a fully managed cloud service

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Apache Kafka operationally heavy to self-host: brokers, storage, rebalancing and upgrades are a standing job, which is why managed Kafka is a large market; Confluent Cloud requires understanding of eCKU (Elastic Confluent Unit) billing

Where they differ

Only the attributes on which Apache Kafka and Confluent Cloud actually diverge.

Attributes where Apache Kafka and Confluent Cloud differ
AttributeApache KafkaConfluent Cloud
Pricing modelOpen source, no licence fee; managed services billed separatelyusage-based
PlatformsLinux, Windows, macOS, Self-hosted, DockerWeb
CategoryDatabasesTechnology

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 Apache Kafka

  • Durable commit log
  • Horizontal scale
  • Kafka Connect
  • Kafka Streams
  • Replication
  • Low latency

Only in Confluent Cloud

Nothing recorded that Apache Kafka does not also cover.

What people use each for

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

Apache Kafka

  • Moving events between services without point-to-point couplingnot Confluent Cloud
  • Feeding analytics and warehouses from operational systems in near real timenot Confluent Cloud
  • Replaying history to rebuild state after a consumer bugnot Confluent Cloud
  • Buffering bursty producers ahead of slower downstream systemsnot Confluent Cloud

Confluent Cloud

  • Apache Kafka event streaming and processingnot Apache Kafka
  • Real-time data pipeline architecturenot Apache Kafka
  • Multi-cloud event broker deploymentnot Apache Kafka
  • Stream processing and analyticsnot Apache Kafka
  • Microservices data synchronizationnot Apache Kafka

Where each one falls short

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

Apache Kafka

  • Operationally heavy to self-host: brokers, storage, rebalancing and upgrades are a standing job, which is why managed Kafka is a large market
  • Overkill for straightforward job queues, where a simpler broker is easier to run and reason about
  • Ordering guarantees hold per partition, not per topic, and getting partitioning wrong is a common and expensive design mistake
  • The ecosystem is fragmented across the Apache project and vendor distributions, so documentation and tooling advice often assume a particular distribution

Confluent Cloud

  • Requires understanding of eCKU (Elastic Confluent Unit) billing
  • Data in/egress costs add $0.014-$0.050 per GB
  • Storage costs of $0.03-$0.08 per GB-month
  • Minimum commitment recommended for cost optimization

Pricing, plan by plan

Apache Kafka

Free
  • Apache KafkaFree
    • Full platform
    • Kafka Connect
    • Kafka Streams

Confluent Cloud

Free
  • BasicFree
    • Free first eCKU
    • Then $0.14 per eCKU-hour
    • 99.5% uptime
  • Standard$385/month
    • $0.75 per eCKU-hour
    • 99.99% uptime with 2+ eCKUs
    • Infinite storage
  • Enterprise$895/month
    • $1.75-$2.25 per eCKU-hour
    • Private networking
    • GBps+ scaling
  • Freight$2300/month
    • $2.25 per eCKU-hour
    • Specialty logging tier
    • Highest throughput requirements

Which should you pick?

Choose Apache Kafka if

  • You need durable commit log.
  • You want to start without paying.
  • You work on Linux, Windows, macOS, Self-hosted, Docker.
  • You also want horizontal scale.
Apache Kafka review

Choose Confluent Cloud if

  • You want to start without paying.
Confluent Cloud review

Questions people ask

Is Apache Kafka or Confluent Cloud better?
Neither clearly leads. Apache Kafka starts at Free and Confluent Cloud at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Apache Kafka or Confluent Cloud?
Apache Kafka starts at Free and Confluent Cloud at Free.
Does Apache Kafka or Confluent Cloud run on more platforms?
Apache Kafka runs on Linux, Windows, macOS, Self-hosted, Docker. Confluent Cloud runs on Web.
Can I use Apache Kafka for free?
Both have a free tier, so you can try either at no cost before committing.
What is Apache Kafka best used for?
Apache Kafka is most often used for moving events between services without point-to-point coupling, feeding analytics and warehouses from operational systems in near real time, replaying history to rebuild state after a consumer bug, buffering bursty producers ahead of slower downstream systems. Of those, moving events between services without point-to-point coupling and feeding analytics and warehouses from operational systems in near real time are not what Confluent Cloud is typically brought in for.
What can Apache Kafka do that Confluent Cloud cannot?
Apache Kafka covers Durable commit log, Horizontal scale, Kafka Connect, Kafka Streams.

Answered from the vendors’ own pages

Apache Kafka: Is Apache Kafka free?

Yes. Kafka is open source under the Apache License v2 with no licence fee. Costs come from the infrastructure you run it on, or from a managed service such as Confluent Cloud.

Confluent Cloud: How much does Confluent Cloud cost?

Confluent Cloud pricing starts free on Basic tier with $0.14 per eCKU-hour, Standard at $0.75 per eCKU-hour (~$385/month base), Enterprise at $1.75-$2.25 per eCKU-hour (~$895/month base), and Freight specialty tier at $2.25 per eCKU-hour (~$2300/month).

Source
Apache Kafka: How is Kafka different from a message queue?

A queue usually removes a message once it is consumed. Kafka keeps an ordered, durable log, so consumers track their own position and history can be replayed — which is what makes rebuilding state after a bug possible.

Confluent Cloud: Is there a free tier for Confluent Cloud?

Yes, the Basic tier is free with one eCKU credit included. Additional usage is billed at $0.14 per eCKU-hour, plus data transfer and storage fees apply.

Source
Apache Kafka: Who uses Kafka?

The project reports use by more than 80% of the Fortune 100, with over 5 million lifetime downloads.

Confluent Cloud: What additional fees does Confluent Cloud charge?

Beyond eCKU hours, Confluent charges data in/egress at $0.014-$0.050 per GB and storage at $0.03-$0.08 per GB-month. Costs vary by tier and region.

Source
Apache Kafka: Do I need to run Kafka myself?

No. Self-hosting is the operationally expensive option; managed services such as Confluent Cloud run the brokers for you and bill on throughput and storage instead.

Confluent Cloud: Does Confluent offer discounts for higher usage?

Yes, volume discounts are negotiated upfront based on annual consumption estimates. Annual commitments allow flexible cross-product allocation with guaranteed cost savings.

Source
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