Prometheus vs Splunk Observability Cloud

Prometheus9.1Visit Splunk Observability Cloud8.5Visit

Higher score Prometheus #2 in Kubernetes Monitoring 9.1/10 Free plan Free plan✓ 0 of 4 features Visit Prometheus

vs

Splunk Observability Cloud #7 in Kubernetes Monitoring 8.5/10 Free plan Free plan✓ 0 of 4 features Visit Splunk

• Prometheus fits best

  Core open-source Kubernetes metrics

• Splunk Observability Cloud fits best

  Teams needing broad observability with a free tier

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Side by side

Feature	Prometheus 9.1/10 Visit ↗	Splunk Observability Cloud 8.5/10 Visit ↗
At a glance
Editor score	9.1	8.5
Ranking	#2 in Kubernetes Monitoring	#7 in Kubernetes Monitoring
Best for	Core open-source Kubernetes metrics	Teams needing broad observability with a free tier
Pricing model	Free	Free plan + paid
Starting price	Free plan	$15/mo
Free plan	✓	✓
Free trial	—	—
Deployment	Self-hosted	Cloud
Platforms	Web, Windows, macOS, Linux	Web
Integrations	8 integrations	6 integrations
Features Prometheus 0/4 · Splunk Observability Cloud 0/4
Control-plane monitoring	Not checked yet	Not checked yet
Kubernetes logs	Not checked yet	Not checked yet
Distributed tracing	Not checked yet	Not checked yet
Managed Kubernetes support	Not checked yet	Not checked yet
Specs
Alerting channels	Not checked yet	Not checked yet
Data retention	Not checked yet	416 days
Our review
Pros	PromQL supports selecting and aggregating multidimensional time series. Service discovery and HTTP scraping support dynamic Kubernetes environments. Alerting rules, Alertmanager, federation, and remote storage extend monitoring.	Free Edition covers up to 15 hosts with full feature parity Combines infrastructure, application, database, log, trace, and user monitoring Supports OpenTelemetry plus AWS, Azure, Google Cloud, and Splunk integrations
Cons	Local storage is single-node rather than horizontally scalable. Focuses on metrics rather than logs or distributed tracing. Effective deployments may require exporters and connected ecosystem components.	Kubernetes-specific capabilities are not a stated focus Paid plans use annual billing and per-host pricing SaaS delivery excludes customer-managed deployment
Our verdict	Prometheus is an open-source monitoring and alerting toolkit for collecting numeric metrics and storing them as timestamped time-series data with labels. It is suited to infrastructure, application, and service monitoring, particularly in… Read the review →	Splunk Observability Cloud is a cloud-based observability platform for engineering, operations, and development teams. It brings infrastructure, applications, services, user interfaces, metrics, traces, and logs into one environment, with… Read the review →

Strengths and trade-offs

• Prometheus — where it wins

  • PromQL supports selecting and aggregating multidimensional time series.
  • Service discovery and HTTP scraping support dynamic Kubernetes environments.
  • Alerting rules, Alertmanager, federation, and remote storage extend monitoring.

  Where it doesn't

  • Local storage is single-node rather than horizontally scalable.
  • Focuses on metrics rather than logs or distributed tracing.
  • Effective deployments may require exporters and connected ecosystem components.

• Splunk Observability Cloud — where it wins

  • Free Edition covers up to 15 hosts with full feature parity
  • Combines infrastructure, application, database, log, trace, and user monitoring
  • Supports OpenTelemetry plus AWS, Azure, Google Cloud, and Splunk integrations

  Where it doesn't

  • Kubernetes-specific capabilities are not a stated focus
  • Paid plans use annual billing and per-host pricing
  • SaaS delivery excludes customer-managed deployment

• Prometheus9.1/10 · Free plan

  A strong open-source choice for Kubernetes metrics, with PromQL and flexible collection.

  Visit PrometheusFull verdict →
• Splunk Observability Cloud8.5/10 · Free plan

  Broad observability coverage with a useful free tier, but limited Kubernetes-specific emphasis.

  Visit SplunkFull verdict →