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Software · head to head

Consul vs Prometheus

Consul logo

Consul

Software

Service discovery, networking, and security

From
Free
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

  • Each has a real cost: Consul namespaces, admin partitions and other multi tenancy controls are Consul Enterprise only; Prometheus not suitable for per-request billing as collected data lacks 100% accuracy
  • They diverge on capability: Consul covers Service discovery, Prometheus covers Multi-dimensional Data Model.

Where they differ

Only the attributes on which Consul and Prometheus actually diverge.

Attributes where Consul and Prometheus differ
AttributeConsulPrometheus
PlatformsLinux, Windows, Mac, CloudLinux, macOS, Windows
Founded20142015

Identical on both: starting price (Free), pricing model (open-source), free tier (Yes), 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 Consul

  • Service discovery
  • Health checking
  • Key/value store
  • Multi-datacenter
  • DNS interface
  • Service mesh
  • Load balancing
  • Configuration management

Only in Prometheus

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

Both cover

  • Kubernetes
  • Linux support

What people use each for

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

Consul

  • Service discovery and health checking across dynamic infrastructurenot Prometheus
  • Running a service mesh with mutual TLS between servicesnot Prometheus
  • Distributed key value configuration storage for applicationsnot Prometheus

Prometheus

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

Where each one falls short

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

Consul

  • Namespaces, admin partitions and other multi tenancy controls are Consul Enterprise only
  • Audit logging, OIDC authentication and FIPS 140-2 builds require Consul Enterprise, so compliance driven deployments cannot use the free edition
  • Automated backups, redundancy zones, read replicas and automated server upgrades are Enterprise only
  • Long Term Support releases are Enterprise only, so community users must upgrade to stay supported
  • Service mesh and advanced traffic management sit in the Premium Enterprise tier above Standard Enterprise
  • HashiCorp does not publish a Consul rate on its pricing page, which lists per resource prices for Terraform instead

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

Consul

Free
  • Open SourceFree
    • Service discovery
    • Health checking
    • KV store

Prometheus

Free

No published plan breakdown. See the Prometheus review.

Which should you pick?

Choose Consul if

  • You need service discovery.
  • You want to start without paying.
  • You work on Linux, Windows, Mac, Cloud.
  • You also want health checking.
Consul 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 Consul or Prometheus better?
Neither clearly leads. Consul 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, Consul or Prometheus?
Consul starts at Free and Prometheus at Free.
Does Consul or Prometheus run on more platforms?
Consul runs on Linux, Windows, Mac, Cloud. Prometheus runs on Linux, macOS, Windows.
Can I use Consul for free?
Both have a free tier, so you can try either at no cost before committing.
What is Consul best used for?
Consul is most often used for service discovery and health checking across dynamic infrastructure, running a service mesh with mutual tls between services, distributed key value configuration storage for applications. Of those, service discovery and health checking across dynamic infrastructure and running a service mesh with mutual tls between services are not what Prometheus is typically brought in for.
What can Consul do that Prometheus cannot?
Consul covers Service discovery, Health checking, Key/value store, Multi-datacenter. Prometheus covers Multi-dimensional Data Model, PromQL Query Language, Pull-based Collection, Service Discovery. Both handle Kubernetes, Linux support.
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