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Cloud & Infrastructure · head to head

Lambda (AWS Serverless) vs Cloudflare

Lambda (AWS Serverless) logo

Lambda (AWS Serverless)

Cloud & Infrastructure

Run code without thinking about servers

From
Free
Rated
-
Full reviewWebsite
Cloudflare logo

Cloudflare

Network & Connectivity

The web performance and security company

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Lambda (AWS Serverless) billed on two axes at once, $0.20 per million requests plus $0.0000166667 per GB-second of duration, so memory settings change the bill as much as traffic does; Cloudflare free tier limited to basic features (no advanced analytics or premium features)
  • They diverge on capability: Lambda (AWS Serverless) covers Function-as-a-Service, Cloudflare covers Global CDN.

Where they differ

Only the attributes on which Lambda (AWS Serverless) and Cloudflare actually diverge.

Attributes where Lambda (AWS Serverless) and Cloudflare differ
AttributeLambda (AWS Serverless)Cloudflare
Pricing modelusage-basedUnknown
PlatformsWeb, ApiWeb
CategoryCloud & InfrastructureNetwork & Connectivity
Founded20142009

Identical on both: starting price (Free), free tier (Yes), 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 Lambda (AWS Serverless)

  • Function-as-a-Service
  • Event-driven execution
  • Auto-scaling
  • Pay-per-use
  • Multiple languages
  • Concurrency limits
  • Dead Letter Queues
  • Environment variables

Only in Cloudflare

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

Both cover

  • Cloud deployment
  • Web support

What people use each for

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

Lambda (AWS Serverless)

  • Event-driven functions without managing serversnot Cloudflare
  • API backends behind API Gatewaynot Cloudflare
  • Processing S3, DynamoDB, SQS and Kinesis eventsnot Cloudflare
  • Scheduled jobs without a always-on instancenot Cloudflare
  • Edge compute through Lambda@Edgenot Cloudflare

Cloudflare

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

Where each one falls short

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

Lambda (AWS Serverless)

  • Billed on two axes at once, $0.20 per million requests plus $0.0000166667 per GB-second of duration, so memory settings change the bill as much as traffic does
  • Provisioned concurrency, used to avoid cold starts, is charged separately at $0.0000041667 per GB-second whether or not the function runs
  • Ephemeral storage beyond the included 512 MB is metered
  • Lambda@Edge costs $0.60 per million requests, three times the standard request rate
  • VPC use and cross-region data transfer carry EC2 charges on top

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

Lambda (AWS Serverless)

Free
  • Free TierFree
    • 1M free requests/month
    • 400,000 GB-seconds/month
    • Always free

Cloudflare

Free

No published plan breakdown. See the Cloudflare review.

Which should you pick?

Choose Lambda (AWS Serverless) if

  • You need function-as-a-service.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want event-driven execution.
Lambda (AWS Serverless) 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 Lambda (AWS Serverless) or Cloudflare better?
Neither clearly leads. Lambda (AWS Serverless) 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, Lambda (AWS Serverless) or Cloudflare?
Lambda (AWS Serverless) starts at Free and Cloudflare at Free.
Does Lambda (AWS Serverless) or Cloudflare run on more platforms?
Lambda (AWS Serverless) runs on Web, Api. Cloudflare runs on Web.
Can I use Lambda (AWS Serverless) for free?
Both have a free tier, so you can try either at no cost before committing.
What is Lambda (AWS Serverless) best used for?
Lambda (AWS Serverless) is most often used for event-driven functions without managing servers, api backends behind api gateway, processing s3, dynamodb, sqs and kinesis events, scheduled jobs without a always-on instance. Of those, event-driven functions without managing servers and api backends behind api gateway are not what Cloudflare is typically brought in for.
What can Lambda (AWS Serverless) do that Cloudflare cannot?
Lambda (AWS Serverless) covers Function-as-a-Service, Event-driven execution, Auto-scaling, Pay-per-use. Cloudflare covers Global CDN, DDoS Protection, WAF, DNS. Both handle Cloud deployment, Web support.
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