Cloudflare operates as a reverse proxy — traffic to your website goes through Cloudflare’s global network before reaching your server. This single architectural change delivers three things simultaneously: faster content delivery through caching at edge locations close to the visitor, protection against DDoS attacks before they reach your origin server, and an SSL certificate without requiring one from your hosting provider.
The free plan delivers all of this at no cost. Cloudflare’s global network spans 330+ data centres in over 100 countries. When a visitor in Singapore loads a page on a US-hosted website, Cloudflare serves the cached version from its Singapore data centre rather than routing the request to the US. Load times improve significantly for international visitors.
DDoS protection on the free tier absorbs volumetric attacks without requiring any configuration. For most websites, this protection alone justifies the five minutes of DNS setup required to activate Cloudflare.
The Pro plan at $20/mo per domain adds image optimisation, more detailed analytics, a more capable Web Application Firewall, and faster support. For an ecommerce site or content publisher where Core Web Vitals directly affect SEO rankings, the image optimisation and caching controls are worth the cost.
Cloudflare has expanded significantly into enterprise security products — Zero Trust network access, Secure Web Gateway, and email security — that are separate from the website acceleration products. These serve IT and security teams managing distributed workforces rather than site owners optimising web performance.