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Cloud · head to head

OpenEBS vs Prometheus

OpenEBS logo

OpenEBS

Cloud

Open source container-attached storage for Kubernetes

From
Free
Rated
-
Full reviewWebsite
Prometheus logo

Prometheus

Networking

Open source monitoring and alerting toolkit for cloud native environments

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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.; Prometheus not suitable for per-request billing as collected data lacks 100% accuracy
  • They diverge on capability: OpenEBS covers Replicated engine, Prometheus covers Multi-dimensional Data Model.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which OpenEBS and Prometheus actually diverge.

Attributes where OpenEBS and Prometheus differ
AttributeOpenEBSPrometheus
Pricing modelOpen source, no licence feeopen-source
PlatformsLinuxLinux, macOS, Windows
CategoryCloudNetworking
FoundedUnknown2015

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 OpenEBS

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

Only in Prometheus

  • Multi-dimensional Data Model
  • PromQL Query Language
  • Pull-based Collection
  • Service Discovery
  • Alerting Rules
  • Federation
  • Local Storage
  • Grafana

What people use each for

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

OpenEBS

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

Prometheus

  • Monitoring and alerting systemnot OpenEBS
  • Time-series databasenot OpenEBS
  • Infrastructure metrics collectionnot OpenEBS

Where each one falls short

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

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.

Prometheus

  • Not suitable for per-request billing as collected data lacks 100% accuracy
  • Hard limit on scrape body size; large responses cause scrape failure
  • Per-scrape sample limit enforced; exceeding limit marks targets as failed
  • Not designed for long-term durable storage; optimised for metrics collection

Pricing, plan by plan

OpenEBS

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

Prometheus

Free
  • Prometheus (Open Source)Free
    • 100% open source
    • Community-driven project
    • Apache 2 License

Which should you pick?

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

Choose Prometheus if

  • You need multi-dimensional data model.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want promql query language.
Prometheus review

Questions people ask

Is OpenEBS or Prometheus better?
Neither clearly leads. OpenEBS starts at Free and Prometheus at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, OpenEBS or Prometheus?
OpenEBS starts at Free and Prometheus at Free.
Does OpenEBS or Prometheus run on more platforms?
OpenEBS runs on Linux. Prometheus runs on Linux, macOS, Windows.
Can I use OpenEBS for free?
Both have a free tier, so you can try either at no cost before committing.
What is OpenEBS best used for?
OpenEBS is most often used for running cassandra or kafka on kubernetes where the application already replicates and node-local volumes are sufficient, a platform team that needs persistent volumes on bare metal kubernetes without a per node subscription, an edge or lab deployment where a commercial storage licence cannot be justified, replacing hostpath volumes with something that has snapshots and a container storage interface driver. Of those, running cassandra or kafka on kubernetes where the application already replicates and node-local volumes are sufficient and a platform team that needs persistent volumes on bare metal kubernetes without a per node subscription are not what Prometheus is typically brought in for.
What can OpenEBS do that Prometheus cannot?
OpenEBS covers Replicated engine, Local PV engines, Kubernetes-native management, Snapshots and clones. Prometheus covers Multi-dimensional Data Model, PromQL Query Language, Pull-based Collection, Service Discovery.

Answered from the vendors’ own pages

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.

Prometheus: What does Prometheus cost?

Prometheus is completely free and open source. There are no pricing tiers or paid plans. The entire project is licensed under Apache 2 and hosted on GitHub.

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.

Prometheus: Is Prometheus commercial software or free?

Prometheus is 100% open source and community-driven. It is a CNCF graduated project with no commercial restrictions or licensing fees.

Source
OpenEBS: Does it cost anything?

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

Prometheus: How is Prometheus licensed?

Prometheus is licensed under the Apache 2 License, which permits free use, modification, and distribution for commercial and non-commercial purposes.

Source
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