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Confluent Cloud vs OpenEBS

Confluent Cloud logo

Confluent Cloud

Cloud

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

From
Free
Free plan
Yes
Visit Confluent CloudFull review
OpenEBS logo

OpenEBS

Cloud

Open source container-attached storage for Kubernetes

From
Free
Free plan
Yes
Visit OpenEBSFull review

The short version

  • Confluent Cloud is a managed Apache Kafka service billed.
  • OpenEBS is free; Confluent Cloud starts at $385/mo.
  • Where Confluent Cloud falls short: requires understanding of eCKU (Elastic Confluent Unit) billing.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Confluent Cloud and OpenEBS actually diverge.

Attributes where Confluent Cloud and OpenEBS differ
AttributeConfluent CloudOpenEBS
Pricing modelUsage-basedOpen source, no licence fee
PlatformsWebLinux

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

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 Confluent Cloud

Nothing recorded that OpenEBS does not also cover.

Only in OpenEBS

  • Replicated engine
  • Local PV engines
  • Kubernetes-native management
  • Snapshots and clones
  • No licence fee
  • Hardware independence

What people use each for

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

Confluent Cloud

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

OpenEBS

  • Running Cassandra or Kafka on Kubernetes where the application already replicates and node-local volumes are sufficientnot Confluent Cloud
  • A platform team that needs persistent volumes on bare metal Kubernetes without a per node subscriptionnot Confluent Cloud
  • An edge or lab deployment where a commercial storage licence cannot be justifiednot Confluent Cloud
  • Replacing hostpath volumes with something that has snapshots and a Container Storage Interface drivernot Confluent Cloud

Where each one falls short

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

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

OpenEBS

  • There is no vendor on the other end of an incident unless you separately contract DataCore, so an outage at three in the morning is resolved by your own team and a public Slack channel
  • The project has several storage engines with different maturity and different operational characteristics, and choosing the wrong one for your workload produces poor results that look like a product failure
  • Documentation and upgrade guidance assume real Kubernetes storage knowledge, so teams without that expertise underestimate the operational load they are taking on
  • Project governance shifted after DataCore acquired MayaData in 2021, which means the direction of a supposedly neutral project is influenced by one commercial sponsor
  • Disaster recovery, cross-cluster replication and policy-driven data services are thinner than in the commercial alternatives, so organisations with those requirements end up building them or buying a product anyway

Pricing, plan by plan

Confluent Cloud

Free
  • BasicFree
    • Free first eCKU
    • Then $0.14 per eCKU-hour
    • 99.5% uptime
  • Standard$385/mo
    • $0.75 per eCKU-hour
    • 99.99% uptime with 2+ eCKUs
    • Infinite storage
  • Enterprise$895/mo
    • $1.75-$2.25 per eCKU-hour
    • Private networking
    • GBps+ scaling
  • Freight$2,300/mo
    • $2.25 per eCKU-hour
    • Specialty logging tier
    • Highest throughput requirements

OpenEBS

Free
  • OpenEBSFree
    • Apache 2.0 licensed
    • All storage engines included
    • No node or capacity limits

Which should you pick?

Choose Confluent Cloud if

  • You want to start without paying.
Confluent Cloud review

Choose OpenEBS if

  • You need replicated engine.
  • You want to start without paying.
  • You work on Linux.
  • You also want local pv engines.
OpenEBS review

Questions people ask

Is Confluent Cloud or OpenEBS better?
Neither clearly leads. Confluent Cloud starts at Free and OpenEBS at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Confluent Cloud or OpenEBS?
Confluent Cloud starts at Free and OpenEBS at Free.
Does Confluent Cloud or OpenEBS run on more platforms?
Confluent Cloud runs on Web. OpenEBS runs on Linux.
Can I use Confluent Cloud for free?
Both have a free tier, so you can try either at no cost before committing.
What is Confluent Cloud best used for?
Confluent Cloud is most often used for apache kafka event streaming and processing, real-time data pipeline architecture, multi-cloud event broker deployment, stream processing and analytics. Of those, apache kafka event streaming and processing and real-time data pipeline architecture are not what OpenEBS is typically brought in for.
What can Confluent Cloud do that OpenEBS cannot?
OpenEBS covers Replicated engine, Local PV engines, Kubernetes-native management, Snapshots and clones.

Answered from the vendors’ own pages

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
OpenEBS: Who supports it in production?

The project is community supported. Commercial support is available from DataCore, which acquired the original sponsor MayaData in 2021. Establish that relationship before production, not during an incident.

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
OpenEBS: Which engine should we use?

If your application replicates its own data, use a Local engine and avoid replicating twice. If it does not, such as with PostgreSQL, use the Replicated engine.

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
OpenEBS: Does it cost anything?

No licence fee. The cost is operational, and a support contract if you want someone accountable.

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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