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Elastic Stack vs Prometheus

Elastic Stack logo

Elastic Stack

Software

Search, Observability, and Security Solutions

From
On request
Rated
-
Full reviewWebsite
Prometheus logo

Prometheus

Software

Open source monitoring and alerting toolkit for cloud native environments

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Prometheus has a free tier, so it costs nothing to try first.
  • Each has a real cost: Elastic Stack self-managed deployment requires licensing based on node count and RAM usage; Prometheus not suitable for per-request billing as collected data lacks 100% accuracy
  • They diverge on capability: Elastic Stack covers Full-text search, Prometheus covers Multi-dimensional Data Model.

Where they differ

Only the attributes on which Elastic Stack and Prometheus actually diverge.

Attributes where Elastic Stack and Prometheus differ
AttributeElastic StackPrometheus
Starting priceOn requestFree
Pricing modelsubscriptionopen-source
Free tierNoYes
PlatformsCloud-hosted, Self-managed, Docker, Kubernetes (ECK)Linux, macOS, Windows
Founded20112015

Identical on both: 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 Elastic Stack

  • Full-text search
  • Log analytics
  • Security monitoring
  • Alerting
  • API
  • Webhooks
  • REST
  • Web support

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.

Elastic Stack

  • Distributed search and analytics engine for production-scale workloadsnot Prometheus
  • Full-text search and vector search with approximate nearest neighbour supportnot Prometheus
  • Security event tracking with field-level and document-level access controlnot Prometheus
  • Machine learning capabilities including anomaly detection and forecastingnot Prometheus

Prometheus

  • Cloud-native monitoring and alertingnot Elastic Stack
  • Time-series metrics collectionnot Elastic Stack
  • Infrastructure monitoringnot Elastic Stack

Where each one falls short

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

Elastic Stack

  • Self-managed deployment requires licensing based on node count and RAM usage
  • Serverless option has pending features including traffic filtering and bring-your-own-key encryption
  • Hosted deployment requires custom resource configuration for cluster management
  • Pricing models differ significantly across Hosted, Serverless, and Self-managed options

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

Elastic Stack

On request

No published plan breakdown. See the Elastic Stack review.

Prometheus

Free

No published plan breakdown. See the Prometheus review.

Which should you pick?

Choose Elastic Stack if

  • You need full-text search.
  • You work on Cloud-hosted, Self-managed, Docker, Kubernetes (ECK).
  • You also want log analytics.
Elastic Stack 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 Elastic Stack or Prometheus better?
Neither clearly leads. Elastic Stack starts at On request and Prometheus at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Elastic Stack or Prometheus?
Prometheus has a free tier; the other does not. Paid plans start at On request for Elastic Stack and Free for Prometheus.
Does Elastic Stack or Prometheus run on more platforms?
Elastic Stack runs on Cloud-hosted, Self-managed, Docker, Kubernetes (ECK). Prometheus runs on Linux, macOS, Windows.
Can I use Prometheus for free?
Yes. Prometheus has a free tier, so you can try it without paying. Elastic Stack starts at On request.
What is Elastic Stack best used for?
Elastic Stack is most often used for distributed search and analytics engine for production-scale workloads, full-text search and vector search with approximate nearest neighbour support, security event tracking with field-level and document-level access control, machine learning capabilities including anomaly detection and forecasting. Of those, distributed search and analytics engine for production-scale workloads and full-text search and vector search with approximate nearest neighbour support are not what Prometheus is typically brought in for.
What can Elastic Stack do that Prometheus cannot?
Elastic Stack covers Full-text search, Log analytics, Security monitoring, Alerting. Prometheus covers Multi-dimensional Data Model, PromQL Query Language, Pull-based Collection, Service Discovery.
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