Softwr

Networking · head to head

Cloudflare vs Prometheus

Cloudflare logo

Cloudflare

Networking

The web performance and security company

From
Free
Rated
-
Full reviewWebsite
Prometheus logo

Prometheus

Networking

Open source monitoring and alerting toolkit for cloud native environments

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Cloudflare free tier limited to basic features (no advanced analytics or premium features); Prometheus not suitable for per-request billing as collected data lacks 100% accuracy
  • They diverge on capability: Cloudflare covers Global CDN, Prometheus covers Multi-dimensional Data Model.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Cloudflare and Prometheus actually diverge.

Attributes where Cloudflare and Prometheus differ
AttributeCloudflarePrometheus
Pricing modelfreemiumopen-source
PlatformsWebLinux, macOS, Windows
Founded20092015

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Networking).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Cloudflare

  • Global CDN
  • DDoS Protection
  • WAF
  • DNS
  • SSL/TLS
  • Load Balancing
  • Bot Management
  • Workers (Serverless)

Only in Prometheus

  • Multi-dimensional Data Model
  • PromQL Query Language
  • Pull-based Collection
  • Service Discovery
  • Alerting Rules
  • Federation
  • Local Storage
  • Grafana

What people use each for

The jobs each tool is most often brought in to do.

Cloudflare

  • Global content delivery network (CDN) with 330+ data centres worldwidenot Prometheus
  • DDoS protection and bot blockingnot Prometheus
  • Web application security and rate limitingnot Prometheus
  • DNS management and domain protectionnot Prometheus
  • Static and dynamic content cachingnot Prometheus
  • Serverless computing via Cloudflare Workersnot Prometheus
  • Database and storage services (D1, R2)not Prometheus
  • Performance optimisation for Core Web Vitalsnot Prometheus

Prometheus

  • Monitoring and alerting systemnot Cloudflare
  • Time-series databasenot Cloudflare
  • Infrastructure metrics collectionnot Cloudflare

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Cloudflare

  • Free tier limited to basic features (no advanced analytics or premium features)
  • Pro tier ($20-25/month) caps at professional websites (higher tiers needed for enterprise scale)
  • Caches only anonymous API GET responses (authenticated requests and non-GET methods not cached)
  • Geographic coverage limited to announced 330+ cities (may not cover all regions globally)

Prometheus

  • Not suitable for per-request billing as collected data lacks 100% accuracy
  • Hard limit on scrape body size; large responses cause scrape failure
  • Per-scrape sample limit enforced; exceeding limit marks targets as failed
  • Not designed for long-term durable storage; optimised for metrics collection

Pricing, plan by plan

Cloudflare

Free

No published plan breakdown. See the Cloudflare review.

Prometheus

Free
  • Prometheus (Open Source)Free
    • 100% open source
    • Community-driven project
    • Apache 2 License

Which should you pick?

Choose Cloudflare if

  • You need global cdn.
  • You want to start without paying.
  • You also want ddos protection.
Cloudflare review

Choose Prometheus if

  • You need multi-dimensional data model.
  • You want to start without paying.
  • You work on Linux, macOS, Windows.
  • You also want promql query language.
Prometheus review

Questions people ask

Is Cloudflare or Prometheus better?
Neither clearly leads. Cloudflare starts at Free and Prometheus at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Cloudflare or Prometheus?
Cloudflare starts at Free and Prometheus at Free.
Does Cloudflare or Prometheus run on more platforms?
Cloudflare runs on Web. Prometheus runs on Linux, macOS, Windows.
Can I use Cloudflare for free?
Both have a free tier, so you can try either at no cost before committing.
What is Cloudflare best used for?
Cloudflare is most often used for global content delivery network (cdn) with 330+ data centres worldwide, ddos protection and bot blocking, web application security and rate limiting, dns management and domain protection. Of those, global content delivery network (cdn) with 330+ data centres worldwide and ddos protection and bot blocking are not what Prometheus is typically brought in for.
What can Cloudflare do that Prometheus cannot?
Cloudflare covers Global CDN, DDoS Protection, WAF, DNS. Prometheus covers Multi-dimensional Data Model, PromQL Query Language, Pull-based Collection, Service Discovery.

Answered from the vendors’ own pages

Cloudflare: Does Cloudflare have a free tier?

Yes, Cloudflare includes a free tier with generous allowances: 100k daily requests for Workers, 10 GB monthly storage for R2, and 1 GB for Workers KV.

Source
Prometheus: What does Prometheus cost?

Prometheus is completely free and open source. There are no pricing tiers or paid plans. The entire project is licensed under Apache 2 and hosted on GitHub.

Source
Cloudflare: How much does Cloudflare cost beyond the free tier?

Cloudflare uses pay-as-you-go pricing beyond free allocations, charging per million requests, per GB-month of storage, or per vCPU-second depending on the service.

Source
Prometheus: Is Prometheus commercial software or free?

Prometheus is 100% open source and community-driven. It is a CNCF graduated project with no commercial restrictions or licensing fees.

Source
Cloudflare: Does Cloudflare charge egress fees?

No, Cloudflare explicitly states no egress fees and no hidden costs; you only pay for the usage metrics specific to each service.

Source
Prometheus: How is Prometheus licensed?

Prometheus is licensed under the Apache 2 License, which permits free use, modification, and distribution for commercial and non-commercial purposes.

Source
Cloudflare: What's the Enterprise pricing model for Cloudflare?

Cloudflare Enterprise offers custom pricing and volume discounts available through direct sales for organizations with specialized needs and large-scale usage.

Source
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