CDN vs Reverse Proxy: Key Differences Explained

CDNs and reverse proxies both sit between users and your origin server. The confusion is understandable. But their primary purposes are different, and most production setups benefit from understanding where one ends and the other begins.

What a CDN is optimized for

A CDN is built to cache and deliver static content (images, CSS, JS, video) from edge nodes close to users. Its primary goal is performance: lower latency, higher throughput, reduced origin load for cacheable assets.

What a reverse proxy is optimized for

A reverse proxy is built to control and inspect traffic. It handles TLS termination, load balancing, authentication, rate limiting, WAF filtering, and bot detection. It proxies every request, cached or not, and applies logic to it.

Where they overlap

Modern CDNs have added security features (WAFs, bot management). Some reverse proxies have added caching. Cloudflare is both. But purpose-built tools tend to do one thing better: a CDN excels at cache distribution, a security-focused reverse proxy excels at traffic inspection and threat response.

Which do you need

Most teams need both: a CDN for static asset performance and a security-focused reverse proxy for traffic analysis and protection. They can be stacked, with the reverse proxy at the edge and the CDN behind it, or combined in a single product.