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Azure Functions vs Cloudflare

Azure Functions logo

Azure Functions

Cloud

Event-driven serverless compute on Azure

From
Free
Rated
-
Full reviewWebsite
Cloudflare logo

Cloudflare

Networking

The web performance and security company

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Azure Functions consumption plan free grant is capped at 1 million executions and 400,000 GB-seconds of resource consumption per month per subscription, billed per GB-second beyond that; Cloudflare free tier limited to basic features (no advanced analytics or premium features)

Where they differ

Only the attributes on which Azure Functions and Cloudflare actually diverge.

Attributes where Azure Functions and Cloudflare differ
AttributeAzure FunctionsCloudflare
Pricing modelusage-basedfreemium
CategoryCloudNetworking
FoundedUnknown2009

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

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 Azure Functions

Nothing recorded that Cloudflare does not also cover.

Only in Cloudflare

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

What people use each for

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

Azure Functions

  • Event-driven computingnot Cloudflare
  • Serverless application backendnot Cloudflare
  • Scalable API endpointsnot Cloudflare

Cloudflare

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

Where each one falls short

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

Azure Functions

  • Consumption plan free grant is capped at 1 million executions and 400,000 GB-seconds of resource consumption per month per subscription, billed per GB-second beyond that
  • The newer Flex Consumption plan's free grant is smaller still, at 250,000 executions and 100,000 GB-seconds per month
  • Premium plan avoids per-execution charges but bills continuously for allocated core seconds and memory regardless of invocation volume
  • Memory is rounded up to the nearest 128 MB and execution time to the nearest 1 ms for billing, so small overages round upward

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)

Pricing, plan by plan

Azure Functions

Free
  • Consumption Plan$null/month
    • 1 million requests free monthly
    • 400,000 GB-seconds free monthly
    • Billed per second and executions
  • Flex Consumption Plan$null/month
    • 250,000 executions free monthly
    • 100,000 GB-seconds free monthly
    • Event-driven scaling
  • Premium Plan$null/month
    • No execution charges
    • At least one instance required
    • Includes automatic scaling and VNET access

Cloudflare

Free

No published plan breakdown. See the Cloudflare review.

Which should you pick?

Choose Azure Functions if

  • You want to start without paying.
Azure Functions review

Choose Cloudflare if

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

Questions people ask

Is Azure Functions or Cloudflare better?
Neither clearly leads. Azure Functions starts at Free and Cloudflare at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Azure Functions or Cloudflare?
Azure Functions starts at Free and Cloudflare at Free.
Does Azure Functions or Cloudflare run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Azure Functions for free?
Both have a free tier, so you can try either at no cost before committing.
What is Azure Functions best used for?
Azure Functions is most often used for event-driven computing, serverless application backend, scalable api endpoints. Of those, event-driven computing and serverless application backend are not what Cloudflare is typically brought in for.
What can Azure Functions do that Cloudflare cannot?
Cloudflare covers Global CDN, DDoS Protection, WAF, DNS.

Answered from the vendors’ own pages

Azure Functions: Does Azure Functions have a free tier?

Yes, Azure Functions includes a monthly free grant of 1 million requests and 400,000 GB-seconds on the Consumption Plan, or 250,000 executions and 100,000 GB-seconds on Flex Consumption.

Source
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
Azure Functions: What is Azure Functions' pricing model?

Azure Functions uses usage-based pricing. Consumption plans charge per second of resource consumption and per execution, measured in gigabyte-seconds and rounded to the nearest 128 MB.

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
Azure Functions: What is the minimum execution time for Azure Functions?

The minimum execution time is 100 milliseconds on Consumption plans. Premium plans charge based on core seconds and allocated memory.

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
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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