Cloudflare vs Fastly vs AWS CloudFront for Ecommerce: CDN Setup and Performance Guide

A Content Delivery Network (CDN) is one of the highest-leverage performance improvements an ecommerce store can make. By serving assets from edge nodes close to your visitors — instead of a single origin server — a good CDN reduces latency, improves Core Web Vitals, and protects against traffic spikes.

But "CDN" covers a massive range of capabilities. Cloudflare, Fastly, and AWS CloudFront each take a different approach to edge delivery, and the right choice depends on your store's stack, traffic profile, and how much configuration you want to manage.

What a CDN Does for Ecommerce

At minimum, a CDN caches static assets (images, CSS, JavaScript, fonts) at edge nodes around the world. Instead of a visitor in Tokyo waiting for a file to load from your US-based server, they receive it from a node in Singapore or Tokyo in milliseconds.

Modern CDNs do considerably more:

• Image optimization — automatic WebP/AVIF conversion, resizing, compression on the fly
• Edge computing — run JavaScript/WASM code at the edge before the request reaches your origin
• DDoS protection — absorb volumetric attacks before they reach your infrastructure
• Bot management — distinguish legitimate crawlers from scrapers and fraud bots
• SSL/TLS termination — handle HTTPS at the edge for faster connections
• HTTP/3 (QUIC) — faster protocol support for mobile visitors

Cloudflare

How it works

Cloudflare operates as a DNS-based proxy. You change your domain's nameservers to Cloudflare, and all traffic routes through Cloudflare's network before reaching your origin. This is the reverse proxy model — Cloudflare sits in front of everything, not just your static assets.

Edge network

Cloudflare operates 300+ data centers globally, including Points of Presence (PoPs) in tier-2 cities that competitors skip. This is particularly valuable for traffic from Southeast Asia, Latin America, and Africa where CDN PoP density varies significantly between providers.

Ecommerce-specific features

• Cloudflare Images — Automatic image optimization, resizing, and WebP/AVIF conversion at the edge. Pricing by stored image + transformation, not by bandwidth. Native integration without changing image URLs.
• Workers — JavaScript execution at the edge. Used by ecommerce teams for A/B testing, personalization, bot-blocking, and edge-side includes (assembling personalized pages at the edge without hitting the origin).
• Waiting Room — Managed queue system for high-traffic events (flash sales, product drops). Visitors are queued and granted entry in order rather than seeing your site collapse under load.
• Turnstile — Privacy-respecting CAPTCHA alternative to protect checkout and account forms from bot attacks without adding friction for real customers.
• Cache Rules — Fine-grained control over what to cache, what headers to set, and what to bypass — including excluding authenticated sessions, cart, and checkout from the cache.

Pricing

Free tier is legitimately useful — unlimited CDN bandwidth, basic DDoS protection, SSL, and caching. Pro plan ($20/mo) adds image optimization, better bot protection, and Web Analytics. Business ($200/mo) adds custom WAF rules and priority support. Workers pricing is usage-based (100,000 free requests/day, then $0.50 per million).

Best for

Most ecommerce stores — especially on Shopify, WooCommerce, or any platform where you control the DNS. Cloudflare's free/Pro tier covers the needs of most stores, the setup is genuinely simple (change nameservers, toggle features), and the feature breadth is hard to match at the price point.

Fastly

How it works

Fastly is a CDN built on Varnish Cache, with a powerful configuration language (VCL — Varnish Configuration Language) that gives engineers precise control over caching behavior, request manipulation, and edge logic. Unlike Cloudflare's dashboard-centric configuration, Fastly is designed for programmers who want to describe exactly how the cache should behave.

Edge network

Fastly operates fewer but larger PoPs than Cloudflare — around 90+ locations, concentrated in high-traffic regions. Coverage is excellent in North America, Europe, and Asia-Pacific; less comprehensive in emerging markets.

Ecommerce-specific features

• Compute@Edge (now Fastly Compute) — WASM-based edge compute supporting Rust, JavaScript, Go, and other languages. More powerful than Cloudflare Workers for complex use cases, but higher complexity to deploy.
• Image Optimizer — On-the-fly image transformation (resize, format conversion, quality adjustment) via URL parameters. Available as an add-on to any Fastly plan.
• Instant Purge — Fastly's defining feature: cache purge latency of ~150ms globally. Competitors can take seconds to minutes. Critical for ecommerce stores that update product availability, prices, or promotional banners and need cache to clear immediately.
• Surrogate-Control headers — Fastly reads custom headers from your origin to control cache TTLs on a per-resource basis, enabling fine-grained cache management without editing CDN configuration.

Pricing

Usage-based with no free tier (free trial available). Pricing starts around $0.12/GB of bandwidth plus request fees. For high-traffic stores, Fastly negotiates volume discounts. Budget ~$500-$2,000/mo for a mid-size ecommerce store at scale.

Best for

Engineering-led teams at mid-to-large ecommerce stores where cache invalidation speed, programmatic cache control, and edge compute for complex personalization or A/B testing are priorities. The Instant Purge feature alone is worth it for stores with frequently changing prices or flash sales. Not recommended for small stores — the learning curve and cost aren't justified without engineering resources.

AWS CloudFront

How it works

CloudFront is Amazon's CDN, deeply integrated with the AWS ecosystem. If your store runs on AWS (EC2, ECS, Lambda@Edge, or S3), CloudFront is the natural choice — traffic between AWS services stays within Amazon's network, reducing latency and data transfer costs.

Edge network

400+ edge locations globally, including Regional Edge Caches (mid-tier nodes that hold content for longer between edge nodes and the origin). Excellent global coverage, comparable to Cloudflare in tier-1 markets.

Ecommerce-specific features

• Lambda@Edge and CloudFront Functions — Run code at the edge. Lambda@Edge supports Node.js and Python with full AWS SDK access (useful for DynamoDB reads for personalization). CloudFront Functions are faster and cheaper but more limited (JavaScript only, no external network calls).
• AWS WAF integration — Deep integration with AWS WAF for custom bot protection, rate limiting, and IP reputation filtering. Requires separate WAF pricing but offers sophisticated rule management.
• Origin Failover — Automatically route to a backup origin if the primary origin returns 5xx errors. Valuable for high-availability ecommerce during deploys or infrastructure issues.
• Origin Shield — An additional caching layer between edge nodes and your origin that reduces origin load. Useful for origins that struggle with cache-miss spikes (product launches, flash sales).

Pricing

Usage-based: $0.0085–$0.12/GB of data transfer (varies by region), plus $0.0075–$0.0200 per 10,000 HTTP/HTTPS requests. Lambda@Edge adds compute pricing. For stores already on AWS, CloudFront's pricing integrates with existing billing and reserved capacity discounts. Standalone, it's not cheaper than Cloudflare for most ecommerce use cases.

Best for

Stores already running on AWS where infrastructure consolidation, Lambda@Edge integration, and staying within the AWS billing and support ecosystem matters. Also excellent for stores with S3-based media storage — CloudFront in front of S3 is the most cost-effective static asset delivery available. Less compelling as a standalone CDN choice vs. Cloudflare if you're not AWS-native.

Decision Framework for Ecommerce Stores

If you...	Consider...
Run on Shopify, WooCommerce, or any hosted platform	Cloudflare (free/Pro tier)
Need sub-second cache invalidation for price/inventory changes	Fastly
Are already on AWS infrastructure	CloudFront
Want edge compute for personalization without engineering overhead	Cloudflare Workers
Run flash sales or product drops with unpredictable traffic spikes	Cloudflare Waiting Room
Have complex VCL cache logic requirements	Fastly
Need the largest possible global PoP coverage	Cloudflare

What CDNs Don't Fix

A CDN improves asset delivery but doesn't fix your underlying store health issues. Slow server response times (high TTFB from your origin), unoptimized images before they reach the CDN, render-blocking JavaScript, and missing structured data are origin problems a CDN can't solve.

StoreVitals monitors your store's full performance health — including TTFB, render-blocking resources, image optimization status, and Core Web Vitals indicators — so you can fix the root-cause issues that CDN caching can't compensate for.