Prometheus vs SigNoz: 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 Prometheus and SigNoz 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:
Prometheus
Monitoring and alerting toolkit
Best for you if:
- • You want a fully free tool (SigNoz requires payment)
SigNoz
Open-source APM and observability
Best for you if:
- • You want open source observability
| At a Glance | Prometheus | SigNoz |
|---|---|---|
Starts at | Free 100% free | Free plan, paid from $199/mo, billed monthly Teams plan |
Category | DevOps Monitoring | Monitoring DevOps |
Rating | 4.5/5 G2 4.5 61 reviews | n/a |
Free plan | Yes | Yes |
Watch out for | Storage costs grow linearly with metric cardinality and retention period | n/a |
Choose Prometheus or SigNoz?
Choose Prometheus if
- You want a fully free tool (SigNoz requires payment)
- You want industry standard
- You want great for metrics
- You work in DevOps, not monitoring
Choose SigNoz if
- You want open source observability
- You want all-in-one
- You work in monitoring, not DevOps
In-Depth Analysis
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
SigNoz
Open-source APM and observability
SigNoz offers a very generous pricing model with its free Community tier, providing full features and unlimited data for self-hosted users.
Strengths
- Pro: Open source observability
- Pro: All-in-one
- Pro: Self-hostable
- Pro: OpenTelemetry native
- Pro: Fair cloud pricing
Weaknesses
- Con: Newer platform
- Con: Self-hosting complex
- Con: Smaller community
- Con: Documentation improving
- Con: Less features than Datadog
Key features
Plans and prices: Prometheus vs SigNoz
| Tool | Plans and prices | Source |
|---|---|---|
| Prometheus |
| prometheus.io read Oct 2, 2026 |
| SigNoz |
| signoz.io/pricing read Oct 18, 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 Prometheus pricing and SigNoz pricing.
Key Takeaways
Prometheus
- Choose if you want monitoring and alerting toolkit
SigNoz
- Choose if you want open-source APM and observability
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); SigNoz has none we can show.
- SigNoz starts at $199/mo, billed monthly; 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 Prometheus and SigNoz 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); SigNoz has none we can show. SigNoz starts at $199/mo, billed monthly; Prometheus has no public paid plan price on file. Both have a free plan.
What are Prometheus and SigNoz used for?
Prometheus: Monitoring and alerting toolkit. SigNoz: Open-source APM and observability.
What does Prometheus cost vs SigNoz?
Prometheus is free. SigNoz's cheapest paid plan is Teams at $199/mo, billed monthly; it also has a free plan. Prices read on the vendors' pricing pages, latest check Oct 18, 2026.
What's the main difference between Prometheus and SigNoz?
Prometheus's main strength: industry standard. SigNoz's main strength: open source observability.