LibreNMS 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 LibreNMS 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:
LibreNMS
Automated network discovery, monitoring, and alerting for your entire infrastructure.
Best for you if:
- • You want open-source and free to use
Prometheus
Monitoring and alerting toolkit
Best for you if:
- • You want industry standard
| At a Glance | LibreNMS | Prometheus |
|---|---|---|
Starts at | Free 100% free | Free 100% free |
Category | Monitoring DevOps | DevOps Monitoring |
Rating | 4.7/5 G2 4.7 14 reviews | 4.5/5 G2 4.5 61 reviews |
Free plan | Yes | Yes |
Watch out for | n/a | Storage costs grow linearly with metric cardinality and retention period |
Choose LibreNMS or Prometheus?
Choose LibreNMS if
- You want open-source and free to use
- You want comprehensive automatic network discovery
- You work in monitoring, not DevOps
Choose Prometheus if
- You want industry standard
- You want great for metrics
- You work in DevOps, not monitoring
In-Depth Analysis
LibreNMS
Automated network discovery, monitoring, and alerting for your entire infrastructure.
Strengths
- Pro: Open-source and free to use
- Pro: Comprehensive automatic network discovery
- Pro: Highly flexible and customizable alerting
- Pro: Scalable architecture with distributed polling
- Pro: Strong community support and active development
Weaknesses
- Con: Requires self-hosting and technical expertise for setup and maintenance
- Con: No official commercial support plans mentioned (community-driven)
- Con: Mobile app mentioned by a third-party, not directly by LibreNMS
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: LibreNMS vs Prometheus
| Tool | Plans and prices | Source |
|---|---|---|
| LibreNMS | No plan prices on file | librenms.org |
| 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 LibreNMS pricing and Prometheus pricing.
Key Takeaways
LibreNMS
- Choose if you want automated network discovery, monitoring, and alerting for your entire infrastructure
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.
- User ratings rest on too few reviews to rank (4.7/5 from 14 reviews for LibreNMS, 4.5/5 from 61 reviews for Prometheus; we compare ratings only above 20 reviews on both sides).
- 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 LibreNMS 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. User ratings rest on too few reviews to rank (4.7/5 from 14 reviews for LibreNMS, 4.5/5 from 61 reviews for Prometheus; we compare ratings only above 20 reviews on both sides). Both have a free plan.
What are LibreNMS and Prometheus used for?
LibreNMS: Automated network discovery, monitoring, and alerting for your entire infrastructure. Prometheus: Monitoring and alerting toolkit.
What does LibreNMS cost vs Prometheus?
LibreNMS is free. Prometheus is free. Prices read on the vendors' pricing pages, latest check Oct 2, 2026.
What's the main difference between LibreNMS and Prometheus?
LibreNMS's main strength: open-source and free to use. Prometheus's main strength: industry standard.