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Prometheus

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Monitoring and alerting toolkit

MonitoringDevOpsAnalytics
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Reviews onG2CapterraSourceForge
135 reviews tracked

The Bottom Line

Entry price

Free, no paid tier

Biggest pro

Industry standard

Biggest con

Long-term storage

TL;DR - Prometheus

  • Prometheus is an open-source monitoring system with a time-series database
  • It collects metrics, provides alerting, and powers Grafana dashboards
  • Completely free and open-source
Pricing: Free forever
Best for: Individuals & startups
4.3/5 across review platforms

What is Prometheus?

Editorial review
Prometheus is an open-source monitoring and alerting toolkit designed for reliability. Pull-based metrics collection scales to thousands of targets. Powerful query language PromQL enables flexible analysis. Built-in alerting with Alertmanager integration. CNCF graduated project used by enterprises worldwide. The standard for metrics monitoring in cloud-native environments.

Available on: Web

how we evaluateSourceprometheus.io ↗

Pros & Cons

Pros

  • Industry standard
  • Great for metrics
  • Open source

Cons

  • Long-term storage
  • Learning curve

Ratings Across the Web

4.3(135 reviews)
G259 reviews
4.4/5
Capterra9 reviews
4.3/5
SourceForge67 reviews
4.3/5

Ratings aggregated from independent review platforms. Learn more

Key Features

MonitoringTime seriesPromQLAlertingCNCFOpen source

Pricing Plans

Pricing checked Jul 13, 2026

Most Popular

Free

Free

Open source

  • Time series DB
  • PromQL
  • Alerting
  • Service discovery
Calculate your costView full pricing

Reviews

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4.3/5

Across 135 verified user reviews on SourceForge, G2, Capterra

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Best Prometheus Alternatives

Top alternatives based on features, pricing, and user needs.

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DatadogFreemium

Cloud monitoring, security, and AI investigations for DevOps

4.4
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ZabbixFreemium

The universal, open-source observability solution for IT & OT infrastructure.

4.5
Nagios logo
NagiosFreemium

The industry standard in open-source IT monitoring tools for servers, networks, applications, and services.

4.6
Grafana logo
GrafanaFreemium

Observability and visualization platform

4.5
Influxdb logo
InfluxdbFreemium

High-speed time-series database for real-time analytics

4.6
VictoriaMetrics logo
VictoriaMetricsFreemium

Simple, reliable, and efficient monitoring for everyone, built by engineers for engineers.

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Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

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Prometheus FAQ

How does Prometheus facilitate monitoring in cloud-native environments?

Prometheus is an open-source monitoring and alerting toolkit that has become the standard for metrics monitoring in cloud-native environments. It uses a pull-based model for metrics collection, which scales efficiently to thousands of targets. This design allows it to effectively gather operational data from dynamic cloud infrastructure.

What kind of user benefits most from Prometheus?

Prometheus is best suited for DevOps teams and site reliability engineers who require robust monitoring and alerting for their systems. Its powerful query language, PromQL, enables flexible analysis of metrics, making it ideal for those who need deep insights into their application and infrastructure performance.

How is Prometheus priced?

Prometheus is free to use, as it is an open-source project. There is no paid plan required to access its features for monitoring and alerting.

Can Prometheus be integrated with other alerting tools?

Yes, Prometheus includes built-in alerting capabilities and integrates with Alertmanager. This allows users to manage and route alerts effectively based on the metrics collected.

What are the main limitations of using Prometheus?

A primary limitation of Prometheus is its approach to long-term storage, which can require additional considerations for extended data retention. Additionally, users may encounter a learning curve when first adopting the toolkit due to its powerful, but specific, query language and configuration.

How does Prometheus compare to Datadog for monitoring?

Prometheus is an open-source monitoring and alerting toolkit, offering a free-to-use solution that is an industry standard for metrics. In contrast, Datadog is a commercial monitoring platform that typically offers a broader range of features beyond just metrics, often including logs and traces, under a paid subscription model.

Source: prometheus.io

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