AWS CloudFront vs Cloudflare: CDN Comparison for 2025

CloudFront and Cloudflare both accelerate content delivery and protect origins from malicious traffic — but they are built around fundamentally different assumptions. CloudFront is an AWS-native service optimized for deep integration with the AWS ecosystem. Cloudflare is a standalone network security and performance platform that works with any infrastructure.

Choosing between them is as much an organizational decision as a technical one.

Overview

WAF Cost Model: A Critical Difference

WAF costs are where the two platforms diverge most sharply in pricing model.

AWS WAF pricing:

• $5.00/month per WebACL
• $1.00/month per rule group
• $0.60 per million requests evaluated

A typical production WebACL with 10 custom rules processing 100 million requests/month costs approximately $65/month before any data transfer. If you also need bot control or account takeover prevention rules, add another $10/month each.

Cloudflare WAF pricing:

• Included in Pro ($20/month) — managed rule sets, rate limiting, 5 custom rules
• Included in Business ($200/month) — full managed WAF, 20 custom rules, OWASP ruleset
• Enterprise — custom pricing with advanced rule sets

For a medium-traffic application running 500 million requests/month with a full managed WAF ruleset, Cloudflare Business is significantly cheaper than equivalent CloudFront + AWS WAF. The math changes for organizations that are already paying for AWS Shield Advanced — Shield Advanced includes AWS WAF usage at no extra charge for resources it protects, effectively making WAF free if you need advanced DDoS protection anyway.

Edge Compute: Lambda@Edge vs Cloudflare Workers

Edge compute is where the architectural differences are most significant.

When Lambda@Edge is the right choice:

• You need AWS SDK access at the edge (calling DynamoDB, Secrets Manager, etc.)
• Your edge logic uses IAM authentication or AWS service APIs
• You are performing A/B testing, authentication, or URL rewriting that benefits from AWS IAM integration
• Your team is already operating Lambda functions and prefers operational consistency

When Cloudflare Workers is the right choice:

• Cold start latency is unacceptable (sub-millisecond response time requirements)
• You need edge compute in markets where CloudFront regional caches are sparse
• You are building Worker-native patterns (Durable Objects, KV storage, R2 integration)
• Your infrastructure is multi-cloud or not AWS-centric

CloudFront Functions fills a middle ground — extremely fast (< 1 ms) and cheap for simple header manipulation, URL rewrites, and redirects, but limited to ES5 JavaScript with 2 MB memory and no external calls.

DDoS Protection

Both platforms provide DDoS mitigation, but the model differs.

CloudFront + AWS Shield:

• Shield Standard is free and included automatically — protects against common Layer 3/4 attacks
• Shield Advanced ($3,000/month + data transfer fees) adds Layer 7 protection, attack diagnostics, DDoS cost protection, and 24/7 access to AWS DDoS Response Team (DRT)
• Shield Advanced is typically justified only for organizations with regular DDoS events or regulatory requirements for incident response documentation

Cloudflare:

• Unmetered DDoS protection is included on all plans, including the free tier
• No separate DDoS product to purchase or configure
• Cloudflare’s network scale (absorbing attacks at the network edge before traffic reaches your origin) is a genuine architectural advantage

For most organizations, Cloudflare’s DDoS story is simpler and cheaper. The exception is organizations that need AWS Shield Advanced’s compliance documentation, cost protection guarantees, or the DRT’s direct involvement during incidents.

Integration Depth with AWS

CloudFront’s integration with the AWS ecosystem is where it has a clear and durable advantage.

If your application is fully AWS-native — S3-hosted assets, API Gateway, ALB origins, WAF rules, CloudWatch dashboards — CloudFront is the lower-complexity option. Introducing Cloudflare adds a second control plane, a second DNS provider (or split DNS configuration), and a second point of failure.

Free Tier and Entry-Level Pricing

For side projects, early-stage startups, or low-traffic properties, Cloudflare’s free tier is the clear winner — unlimited bandwidth, SSL, and basic DDoS protection without an expiry date.

Decision Framework

Choose CloudFront when:

• Your application is fully hosted on AWS (S3, EC2, ALB, API Gateway)
• You need S3 Origin Access Control (OAC) to restrict direct S3 access
• You are using Lambda@Edge for AWS-integrated edge logic
• You want a single AWS bill and unified CloudWatch observability
• You are already using AWS WAF and Shield Advanced

Choose Cloudflare when:

• Your infrastructure is multi-cloud or not AWS-centric
• WAF and DDoS protection cost is a primary driver
• You need the best possible global performance in emerging markets
• You want Workers’ zero cold start for edge compute
• You are starting a new project and want simplicity over deep AWS integration

Our AWS CloudFront consulting service covers CloudFront configuration, Lambda@Edge deployments, WAF rule tuning, and Origin Access Control setups. If you are deciding between the two platforms or migrating from one to the other, we can help you model the cost and complexity trade-offs for your specific traffic patterns.