Prometheus vs QuestDB: 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 QuestDB side by side. This page compares data; it is not a hands-on review.
On the data: On the data below, QuestDB leads on higher user rating. We do not name an overall 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
QuestDB
Time series database for fast analytics
| At a Glance | Prometheus | |
|---|---|---|
Starts at | Free 100% free | Free plan |
Category | DevOps Monitoring | Analytics Data & Databases |
Rating | 4.5/5 G2 4.5 61 reviews | 4.8/5 G2 4.8 35 reviews |
Free plan | Yes | Yes |
Watch out for | Storage costs grow linearly with metric cardinality and retention period | n/a |
Choose Prometheus or QuestDB?
Choose Prometheus if
- You need DevOps features specifically.
Choose QuestDB if
- You need analytics features specifically.
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
QuestDB
Time series database for fast analytics
QuestDB offers a very generous freemium model with its Open Source tier at $0, providing a high-performance core engine for basic needs.
Strengths
- Pro: Very fast time-series
- Pro: SQL interface
- Pro: Good for financial data
- Pro: Open source
- Pro: Low resource usage
Weaknesses
- Con: Smaller community
- Con: Less features than competitors
- Con: Newer platform
- Con: Limited ecosystem
- Con: Specific use cases
Key features
Plans and prices: Prometheus vs QuestDB
| Tool | Plans and prices | Source |
|---|---|---|
| Prometheus |
| prometheus.io read Oct 2, 2026 |
| QuestDB |
| questdb.io/pricing read Nov 9, 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 QuestDB pricing.
Key Takeaways
Prometheus
- Worth considering for DevOps
QuestDB
- Higher user rating: 4.8/5 vs 4.5/5
What the data shows
On the data below, QuestDB leads on higher user rating. We do not name an overall winner for this pair.
- QuestDB has the higher user rating (4.5/5 from 61 reviews for Prometheus, 4.8/5 from 35 reviews for QuestDB).
- 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 QuestDB compare in 2026?
On the data below, QuestDB leads on higher user rating. We do not name an overall winner for this pair. QuestDB has the higher user rating (4.5/5 from 61 reviews for Prometheus, 4.8/5 from 35 reviews for QuestDB). Both have a free plan.
What are Prometheus and QuestDB used for?
Prometheus: Monitoring and alerting toolkit. QuestDB: Time series database for fast analytics.
What does Prometheus cost vs QuestDB?
Prometheus is free. QuestDB has no public paid-plan price on file. Prices read on the vendors' pricing pages, latest check Nov 9, 2026.
What's the main difference between Prometheus and QuestDB?
Prometheus's main strength: industry standard. QuestDB's main strength: very fast time-series.
Spotted an outdated price or a wrong fact? Suggest a correction: we check it against the vendor's own page. Work for one of these vendors? Claim your listing to update it yourself.