Prometheus vs Datadog: Which is Better in 2026?
Choosing between Prometheus and Datadog comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Bottom line: Datadog wins this matchup. SolarWinds is our overall Monitoring pick. Hookdeck is our free Monitoring pick. Pick Prometheus if you need a fully free option.
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 (Datadog requires payment)
Datadog
Cloud monitoring, security, and AI investigations for DevOps
Best for you if:
- • You want comprehensive platform
| At a Glance | Prometheus | Datadog |
|---|---|---|
Starts at | Free 100% free | Free Free plan |
Category | Monitoring DevOps | Monitoring Log Management |
Rating | 4.5/5 G2 4.5 61 reviews | 4.4/5 G2 4.4 726 reviews |
Free plan | Yes | Yes |
Watch out for | Storage costs grow linearly with metric cardinality and retention period | APM requires Infrastructure Monitoring on the SAME hosts: you cannot buy APM alone. Most pricing pages only show the APM price |
Choose Prometheus or Datadog?
Choose Prometheus if
- You want a fully free tool (Datadog requires payment)
- You want industry standard
- You want great for metrics
Choose Datadog if
- You want comprehensive platform
- You want great visualizations
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
Datadog
Cloud monitoring, security, and AI investigations for DevOps
Datadog is the most comprehensive observability platform, infrastructure monitoring, APM, logs, RUM, security, and 750+ integrations in one place.
Watch out
APM requires Infrastructure Monitoring on the SAME hosts: you cannot buy APM alone. Most pricing pages only show the APM price
Strengths
- Pro: Comprehensive platform
- Pro: Great visualizations
- Pro: 700+ integrations
Weaknesses
- Con: Complex pricing
- Con: Can be expensive
Key features
Pricing: Prometheus vs Datadog
| Plan | Prometheus | Datadog |
|---|---|---|
| Tier 1 | Free Free | Free Free |
| Tier 2 | N/A | $15 /host/month (annual) Infrastructure Pro |
| Tier 3 | N/A | $23 /host/month (annual) Infrastructure Enterprise |
| Tier 4 | N/A | $31 /host/month (annual, with Infra) APM |
| Tier 5 | N/A | $40 /host/month (annual, with Infra) APM Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on Prometheus pricing and Datadog pricing.
Key Takeaways
Datadog
- Larger review base (726 reviews)
- Free tier available
- Our pick for this comparison
Prometheus
- Completely free
- Higher user rating: 4.5/5 vs 4.4/5
The Bottom Line
Datadog wins this matchup. SolarWinds is our overall Monitoring pick. Hookdeck is our free Monitoring pick. That said, Prometheus is free, hard to beat on price.
Frequently Asked Questions
Is Prometheus or Datadog better in 2026?
Datadog wins this matchup. SolarWinds is our overall Monitoring pick. Hookdeck is our free Monitoring pick. Pick Prometheus for monitoring workflows (main strength: industry standard). Pick Datadog for monitoring workflows (main strength: comprehensive platform).
What are Prometheus and Datadog used for?
Prometheus: Monitoring and alerting toolkit. Datadog: Cloud monitoring, security, and AI investigations for DevOps.
What does Prometheus cost vs Datadog?
Prometheus is free. Datadog's paid plans start at Free (Infrastructure Pro).
What's the main difference between Prometheus and Datadog?
Prometheus's main strength: industry standard. Datadog's main strength: comprehensive platform.