Icinga vs Prometheus: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for Icinga and Prometheus side by side. This page compares data; it is not a hands-on review.
On the data: On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Icinga
Open-source infrastructure monitoring for complex and hybrid IT environments.
Best for you if:
- • You want open-source and highly customizable
Prometheus
Monitoring and alerting toolkit
Best for you if:
- • You want a fully free tool (Icinga requires payment)
| At a Glance | Icinga | Prometheus |
|---|---|---|
Starts at | Free plan, paid from $166.67/mo, billed yearly Module Subscription plan | Free 100% free |
Category | Monitoring DevOps | DevOps Monitoring |
Rating | n/a | 4.5/5 G2 4.5 61 reviews |
Free plan | Yes | Yes |
Watch out for | Module subscription features are 'upcoming', not all available. | Storage costs grow linearly with metric cardinality and retention period |
Choose Icinga or Prometheus?
Choose Icinga if
- You want open-source and highly customizable
- You want supports hybrid environments (on-premise and cloud)
- You work in monitoring, not DevOps
Choose Prometheus if
- You want a fully free tool (Icinga requires payment)
- You want industry standard
- You want great for metrics
- You work in DevOps, not monitoring
In-Depth Analysis
Icinga
Open-source infrastructure monitoring for complex and hybrid IT environments.
Icinga's pricing model is generous for open-source users with its robust 'Forever Free Edition'.
Watch out
Module subscription features are 'upcoming', not all available.
Strengths
- Pro: Open-source and highly customizable
- Pro: Supports hybrid environments (on-premise and cloud)
- Pro: Scalable for enterprise-grade deployments
- Pro: Extensive integration capabilities with existing tools
- Pro: Provides comprehensive visibility across IT components
Weaknesses
- Con: Requires technical expertise for setup and configuration
- Con: May have a steeper learning curve compared to commercial off-the-shelf solutions
- Con: Reliance on community support for some issues, though enterprise support is available
Key features
Prometheus
Monitoring and alerting toolkit
Prometheus is 100% free and open source (Apache 2.0).
Watch out
Storage costs grow linearly with metric cardinality and retention period
Strengths
- Pro: Industry standard
- Pro: Great for metrics
- Pro: Open source
Weaknesses
- Con: Long-term storage
- Con: Learning curve
Key features
Plans and prices: Icinga vs Prometheus
| Tool | Plans and prices | Source |
|---|---|---|
| Icinga |
| icinga.com/pricing read Oct 30, 2026 |
| Prometheus |
| prometheus.io read Oct 2, 2026 |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on Icinga pricing and Prometheus pricing.
Key Takeaways
Icinga
- Choose if you want open-source infrastructure monitoring for complex and hybrid IT environments
Prometheus
- Choose if you want monitoring and alerting toolkit
What the data shows
On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
- Only Prometheus has a published user rating (4.5/5 from 61 reviews); Icinga has none we can show.
- Icinga starts at $166.67/mo, billed yearly; Prometheus has no public paid plan price on file.
- Both have a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do Icinga and Prometheus compare in 2026?
On the data below the two are close or not directly comparable, so we do not name a winner for this pair. Only Prometheus has a published user rating (4.5/5 from 61 reviews); Icinga has none we can show. Icinga starts at $166.67/mo, billed yearly; Prometheus has no public paid plan price on file. Both have a free plan.
What are Icinga and Prometheus used for?
Icinga: Open-source infrastructure monitoring for complex and hybrid IT environments. Prometheus: Monitoring and alerting toolkit.
What does Icinga cost vs Prometheus?
Icinga's cheapest paid plan is Module Subscription at $166.67/mo, billed yearly; it also has a free plan. Prometheus is free. Prices read on the vendors' pricing pages, latest check Oct 30, 2026.
What's the main difference between Icinga and Prometheus?
Icinga's main strength: open-source and highly customizable. Prometheus's main strength: industry standard.