Best CDN APIs for Developers in 2026

TL;DR

If you just want the answer: Cloudflare for the best all-around platform with a genuinely useful free tier, Fastly for real-time purge and edge compute, AWS CloudFront for deep AWS integration, Bunny CDN for the lowest per-GB cost, Vercel Edge Network for frontend framework deployments, and KeyCDN for simple pay-as-you-go without platform complexity. Read on for the full breakdown.

Key Takeaways

Cloudflare is the default for most developers -- free unlimited bandwidth, 330+ PoPs, DDoS protection, and Workers for edge compute.
Fastly delivers 150ms global cache purge and Compute@Edge with WebAssembly for content that changes frequently.
AWS CloudFront has 600+ edge locations with free data transfer from AWS origins and two tiers of edge compute.
Bunny CDN starts at $0.01/GB with a $1/month minimum -- the most affordable CDN with global coverage.
Vercel Edge Network is the best way to deliver Next.js and frontend framework apps at the edge with zero configuration.
KeyCDN offers flat $0.04/GB pricing with no minimums, a RESTful API, and image processing -- just content delivery.

The CDN Landscape in 2026

CDNs in 2026 are no longer just caching layers. They fall into distinct categories.

Full edge platforms (Cloudflare, Fastly) provide CDN as the foundation for serverless compute, security, DNS, storage, and media delivery. You are adopting a platform, not just a cache.

Cloud-native CDNs (AWS CloudFront) integrate deeply with a cloud provider's ecosystem. Data transfer from origin to edge is free, and edge compute uses the same languages as your backend.

Budget CDNs (Bunny CDN, KeyCDN) focus on delivery at the lowest cost. Fewer enterprise features, but dramatically cheaper bandwidth.

Framework-integrated CDNs (Vercel Edge Network) are built into deployment platforms. You deploy your app and edge caching happens automatically.

Quick Comparison Table

Provider	Best For	Edge Locations	Free Tier	Starting Price	Edge Compute
Cloudflare	Full edge platform	330+ PoPs	Unlimited bandwidth	$20/mo (Pro)	Workers (JS/Wasm)
Fastly	Real-time content	90+ PoPs	Limited	$50/mo minimum	Compute@Edge (Wasm)
CloudFront	AWS ecosystem	600+ PoPs	1TB/mo	~$0.085/GB	Lambda@Edge
Bunny CDN	Budget CDN	119 PoPs	14-day trial	$0.01/GB	Limited
Vercel Edge	Frontend frameworks	Global	100GB/mo	$20/user/mo	Edge Functions
KeyCDN	Simple pay-as-you-go	50+ PoPs	None	$0.04/GB	None

1. Cloudflare -- Best Full Platform

Best for: CDN, security, edge compute, DNS, and storage in one platform with a production-ready free tier

Cloudflare's free tier is not a demo -- it includes unlimited CDN bandwidth, DDoS protection, DNS hosting, basic WAF rules, SSL/TLS, and 100,000 Workers requests per day. Many production sites run on the free plan indefinitely.

Workers turn every edge location into a serverless compute node. V8 isolates (JavaScript/TypeScript/Wasm) cold-start in sub-milliseconds. Combined with KV, R2 (S3-compatible storage with zero egress), D1 (SQLite at the edge), and Queues, Workers can power full applications at the edge.

Key strengths:

Free unlimited CDN bandwidth with DDoS protection at every tier
330+ PoPs within 50ms of 95% of connected users
Workers edge compute with sub-millisecond cold starts
R2 object storage with zero egress fees
Comprehensive security: WAF, bot management, API Shield
Images and Stream for media optimization and delivery

Pricing:

Free: unlimited bandwidth, DDoS, DNS, basic WAF, 100K Workers requests/day
Pro: $20/month -- enhanced WAF, image optimization, analytics
Business: $200/month -- advanced security, custom rules
Enterprise: custom pricing

Limitations:

Free WAF is limited; serious security needs Pro or Business
Workers use V8 isolates, not Node.js -- some npm packages need modification
Cache configuration has a steep learning curve
No phone support on free or Pro plans

Best when: You want one vendor for CDN, DNS, security, and edge compute with a free tier that genuinely works for production.

2. Fastly -- Best Real-Time CDN

Best for: Content that changes frequently where cache invalidation speed is critical

Fastly's defining feature is instant purge -- cache invalidation completes globally in approximately 150 milliseconds. For news sites, e-commerce pages, and API responses, this eliminates the tradeoff between caching and freshness.

Compute@Edge runs WebAssembly at the edge with near-zero cold starts. Unlike Cloudflare Workers (V8 isolates), it supports Rust, Go, JavaScript, and any language that compiles to Wasm. VCL (Varnish Configuration Language) provides granular, programmable cache control for teams that need fine-tuned caching logic.

Key strengths:

150ms global cache purge -- fastest in the industry
Compute@Edge with Wasm supporting Rust, Go, and JavaScript
VCL for programmable cache control
Real-time log streaming to Datadog, S3, BigQuery, etc.
Image Optimizer for on-the-fly resizing and format conversion
WAF and DDoS protection included

Pricing:

Free tier available with limited bandwidth
Pay-as-you-go: ~$0.12/GB (NA), ~$0.19/GB (EU), ~$0.28/GB (Asia)
$50/month minimum on paid plans
Flat-rate packages from $1,500/month (100M requests)

Limitations:

Fewer PoPs than Cloudflare (90 vs 330+) or CloudFront (600+)
$50/month minimum makes it expensive for low-traffic sites
VCL has a significant learning curve
Per-GB pricing is 3-12x more expensive than Bunny CDN

Best when: You serve content that changes frequently and need sub-second global cache invalidation. Media companies, large e-commerce, and API providers benefit most.

3. AWS CloudFront -- Best for AWS Ecosystems

Best for: Teams on AWS wanting tight origin integration and edge compute

CloudFront has the largest edge network (600+ PoPs) and a compelling integration story for AWS teams: data transfer from S3, EC2, ALB, and API Gateway to CloudFront edges is free. Two tiers of edge compute cover different needs -- CloudFront Functions ($0.10/million invocations) for lightweight logic, and Lambda@Edge ($0.60/million) for full Node.js/Python at the edge.

AWS introduced flat-rate pricing plans alongside pay-as-you-go. The Free plan ($0/month) includes 1M requests and 100GB data transfer. Pro ($15/month) and Business ($200/month) include up to 50TB of data transfer with no overages, simplifying cost management.

Key strengths:

600+ edge locations -- the largest CDN network globally
Free data transfer from AWS origins to CloudFront
Two tiers of edge compute: CloudFront Functions and Lambda@Edge
Origin Shield to reduce origin load
Flat-rate pricing plans with no overage charges
Deep integration with IAM, CloudWatch, WAF, and Route 53

Pricing:

Free plan: $0/month -- 1M requests, 100GB data transfer
Pro plan: $15/month -- 10M requests, 50TB data transfer
Business plan: $200/month -- 125M requests, 50TB data transfer
Pay-as-you-go: ~$0.085/GB (first 10TB, US)

Limitations:

AWS ecosystem lock-in
Pay-as-you-go pricing is complex (per-region, per-request-type billing)
Lambda@Edge has cold starts and is limited to Node.js/Python
No built-in image optimization
Configuration is verbose for simple use cases

Best when: Your backend runs on AWS and you want zero origin data transfer costs, edge compute with Lambda, and the largest global edge network.

4. Bunny CDN -- Best Budget CDN

Best for: Global CDN performance without enterprise pricing

Bunny CDN (bunny.net) starts at $0.01/GB on the Standard Network and drops to $0.005/GB on the Volume Network -- 4-8x cheaper than Fastly and significantly cheaper than CloudFront pay-as-you-go. The $1/month minimum means you can run a CDN for less than a cup of coffee.

Performance is strong despite the price. 119 PoPs across 82 countries deliver an average global latency of 25ms. Bunny Optimizer handles image optimization at $9.50/month per zone. Bunny Stream provides video delivery. The API is RESTful with no request fees -- you pay only for bandwidth.

Key strengths:

$0.01/GB Standard, $0.005/GB Volume -- industry-leading pricing
119 PoPs across 82 countries with 25ms average latency
Bunny Optimizer, Stream, DNS, and Edge Storage
No request fees -- bandwidth-only pricing
Simple, transparent pricing with no overage surprises

Pricing:

Standard Network: $0.01/GB (NA/EU)
Volume Network: $0.005/GB for high-traffic projects
$1/month minimum spend
Bunny Optimizer: $9.50/month per zone
14-day free trial with full access

Limitations:

No full edge compute platform
Fewer enterprise security features (no configurable WAF)
Smaller documentation and community
No free permanent tier
Fewer official SDKs

Best when: Bandwidth cost is your primary concern and you need a CDN that delivers globally without the complexity or cost of a full edge platform.

5. Vercel Edge Network -- Best for Frameworks

Best for: Next.js and frontend framework deployments where CDN should be invisible

Vercel Edge Network is not a CDN you configure -- it configures itself. Deploy a Next.js, Nuxt, SvelteKit, or Remix app to Vercel and static assets are cached globally. ISR keeps pages fresh without full rebuilds. Image Optimization runs on-the-fly. Edge Functions handle server-side logic at the edge.

The tradeoff is platform lock-in. Vercel Edge only serves content deployed through Vercel. Bandwidth overages on Pro ($0.15/GB beyond 1TB) can add up for high-traffic applications.

Key strengths:

Zero-configuration CDN for framework deployments
Automatic ISR for fresh statically generated pages
Edge Functions for server-side logic
Image Optimization with automatic format selection
Preview deployments for every Git branch
Built-in analytics and Web Vitals monitoring

Pricing:

Hobby (Free): 100GB bandwidth/month, 1M Edge Requests
Pro: $20/user/month -- 1TB bandwidth, 10M Edge Requests
Enterprise: custom -- 99.99% SLA, SAML SSO, advanced security
Overages: $0.15/GB bandwidth on Pro

Limitations:

Vercel platform lock-in -- not usable as a standalone CDN
Bandwidth overages are expensive at scale
Limited to Vercel-supported frameworks
No traditional CDN features (VCL, origin shields, custom edge scripting)

Best when: You are deploying a Next.js app and want edge delivery without thinking about CDN configuration.

6. KeyCDN -- Best Simple Pay-as-You-Go

Best for: Straightforward CDN without platform complexity or minimum commitments

KeyCDN charges $0.04/GB for every region with no minimum monthly commitment. Unlike Cloudflare (tiered features), Fastly (regional pricing), or CloudFront (complex billing), KeyCDN uses one flat rate globally. Cost forecasting is trivial.

The RESTful API provides full control over zones, cache purging, and traffic reporting. Image processing handles resizing, cropping, and format conversion at the edge. HTTP/2 support, free Let's Encrypt SSL, and instant purge cover the fundamentals. No serverless functions, no built-in WAF -- just content delivery.

Key strengths:

Flat $0.04/GB pricing for all regions
No minimum commitment or long-term contracts
RESTful API for zones, purging, and analytics
Image processing at the edge
Free Let's Encrypt SSL with automatic renewal
HTTP/2, instant purge, real-time analytics
24+ CMS integrations (WordPress, Drupal, Joomla, Magento)

Pricing:

$0.04/GB pay-as-you-go (flat rate, all regions)
No monthly minimum
$4 minimum balance applied to account
All features included -- no tiered gating

Limitations:

Fewest PoPs in this list (50 vs 119-600+)
No edge compute or serverless functions
No built-in WAF or advanced DDoS protection
No free tier (minimum $4 balance)

Best when: You need a CDN for static assets or media and want predictable, simple pricing without platform complexity.

How to Choose Your CDN API

Start with your use case:

Scenario	Best Choice	Runner-Up
Full edge platform with free tier	Cloudflare	Fastly
Real-time content, instant purge	Fastly	Cloudflare
AWS-native infrastructure	CloudFront	Cloudflare
Lowest bandwidth cost	Bunny CDN	KeyCDN
Next.js / frontend framework	Vercel Edge	Cloudflare
Simple CDN, no platform complexity	KeyCDN	Bunny CDN
Edge compute with Wasm	Fastly	Cloudflare
Startup on a tight budget	Cloudflare	Bunny CDN

Then consider your constraints:

Budget. If cost per GB is the driver, Bunny CDN is unmatched. If you want free, Cloudflare has no real competitor. For predictability, CloudFront flat-rate plans or KeyCDN's global flat rate simplify planning.
Existing infrastructure. AWS shops should default to CloudFront (free origin transfer). Vercel users get edge delivery included. Everyone else should evaluate Cloudflare first.
Edge compute. Cloudflare Workers (V8, largest network), Fastly Compute@Edge (Wasm, fastest purge), CloudFront Lambda@Edge (Node/Python, AWS), or Vercel Edge Functions (framework-integrated).
Security. Cloudflare and Fastly include enterprise WAF and DDoS. CloudFront needs AWS WAF and Shield separately. Bunny and KeyCDN offer basic protection only.
Simplicity. Vercel is zero-config for frameworks. KeyCDN and Bunny are simple for traditional CDN. Cloudflare, Fastly, and CloudFront offer more power but more configuration.

A practical decision tree:

Want the most capabilities for free? Cloudflare.
Need sub-second cache invalidation? Fastly.
Running on AWS? CloudFront.
Cheapest bandwidth possible? Bunny CDN.
Deploying Next.js with zero config? Vercel Edge.
Simple CDN without complexity? KeyCDN.

Methodology

This comparison is based on publicly available documentation, pricing pages, API references, and developer community feedback as of March 2026. We evaluated each provider across six dimensions:

Network coverage. PoP count, geographic distribution, and average latency.
Edge compute. Runtime capabilities, language support, cold starts, and pricing.
Pricing. Free tier generosity, per-GB cost at scale, and pricing predictability.
Developer experience. API design, SDK availability, and documentation quality.
Security. DDoS, WAF, bot management, and feature availability by tier.
Ecosystem. Additional services, integrations, and platform breadth.

We did not receive compensation from any provider listed in this article. Rankings reflect our assessment of each provider's strengths relative to developer needs.

Comparing CDN APIs? Explore Cloudflare, Fastly, CloudFront, Bunny CDN, and more on APIScout -- pricing, features, and developer experience across every major CDN provider.

Comments