Edge computing and DDoS protection at 300+ cities. Cache, compute, and secure traffic before it hits your origin.
Cloudflare is a reverse proxy and edge computing platform that sits between your users and your origin servers. Instead of serving content directly from your data center, Cloudflare caches and processes requests at 300+ edge locations worldwide, reducing latency and origin load. For operators, this splits into three workflows: (1) content acceleration via caching, (2) edge compute via Workers serverless functions, and (3) security filtering (DDoS, bots, WAF rules). The CDN layer is the entry point. You point your DNS to Cloudflare, and static assets (images, CSS, JS) cache automatically at edge nodes. Dynamic content—API responses, personalized pages—can also be cached if you set cache rules correctly. The win: your origin server handles fewer requests, and users in Tokyo or São Paulo see content from a nearby edge node instead of waiting for a transatlantic round trip. Workers is where operators unlock edge compute. Instead of running logic only at origin, you write lightweight functions that execute at the edge. Common patterns: request routing (send /api/* to one origin, /blog/* to another), authentication checks before origin sees the request, rate limiting per IP, header injection, or request transformation. No cold starts. No server to manage. The tradeoff: Workers have CPU and memory limits; heavy lifting still happens at origin. Security is the third pillar. Cloudflare's WAF blocks common attacks (SQL injection, XSS, known CVEs). DDoS protection is automatic—traffic is filtered before it reaches your origin. Bot Management identifies and blocks malicious crawlers. Rate limiting prevents brute force attacks. All of this happens at the edge, so your origin never sees the attack traffic. Who uses this: SaaS platforms with global users (need low latency), high-traffic sites (need DDoS protection and origin offload), and teams that want to move logic away from origin (Workers). Developers love Cloudflare because the API is clean and the dashboard is usable. Pricing is tiered. Free plan includes basic CDN and WAF. Pro and Business plans add more WAF rules, higher rate limits, and priority support. Workers pricing is separate—you pay per request, with a generous free tier. Enterprise plans exist for teams needing custom DDoS mitigation or dedicated support. Honest limits: Cloudflare is a reverse proxy, not a replacement for your origin infrastructure. If your origin is slow, Cloudflare caches the slow response. Workers have execution time limits (50ms on free tier, longer on paid). Cache invalidation can be tricky if you don't set rules correctly—stale content is a real failure mode. And if Cloudflare's edge goes down (rare), your site is unreachable unless you have a fallback. Alternatives: Akamai (enterprise CDN, higher cost), AWS CloudFront (tighter AWS integration, different pricing model), Fastly (developer-friendly, strong for video), Bunny CDN (cheaper, less feature-rich). Cloudflare wins on ease of use and the Workers ecosystem.
Edge computing and DDoS protection at 300+ cities. Cache, compute, and secure traffic before it hits your origin.
Cache static and dynamic content at 300+ edge locations to reduce origin latency for global users without building regional infrastructure; Run request routing, authentication, and rate limiting at the edge using Workers before traffic reaches your origin servers; Block DDoS attacks, bot traffic, and common web vulnerabilities (SQL injection, XSS) with integrated WAF and automatic threat detection; Implement request transformation, header injection, and API gateway logic at the edge without adding origin compute.
Cloudflare uses a freemium pricing model, starting around See vendor site, with a free plan available. Pricing changes often — confirm current tiers on the vendor site.
Yes, Cloudflare lists an API, so you can integrate it into custom workflows.
Reverse proxy model means Cloudflare can't fix slow origin logic; caching slow responses makes the problem worse; Workers have execution time and memory limits; CPU-intensive workloads must stay at origin; Cache invalidation requires explicit rules; misconfigured TTLs lead to stale content in production; DDoS and WAF rules require tuning; overly aggressive rules block legitimate traffic and create false positives.
Popular Cloudflare alternatives include aws-cloudfront, fastly, akamai, aws-lambda-edge. See the full alternatives page for side-by-side comparisons.