Finden Sie die richtige WAF für Ihr Unternehmen

It depends on your stack and budget. For most sites, Cloudflare WAF offers strong protection with a generous free tier and trivial DNS-based setup. For AWS-native workloads, AWS WAF integrates directly with ALB and CloudFront. Enterprises needing advanced bot management and API protection typically choose Akamai, Imperva, or Fastly Next-Gen WAF. See our full provider list for detailed ratings across all 10 WAFs we cover.

Cloudflare's free plan includes basic WAF rules and DDoS protection, making it the most popular free option. For self-hosted setups, ModSecurity (works with Apache and Nginx) and Coraza (modern Go-based alternative) are solid open-source choices. BunkerWeb and SafeLine add web-based management on top. We cover all 5 free options in our free WAF guide.

Start with your deployment model. Cloud WAFs like Cloudflare and Sucuri require only a DNS change. Reverse proxy WAFs like ModSecurity need server-level configuration. Then consider pricing (per-request, per-site, or bandwidth-based), compliance requirements (SOC2, PCI-DSS, HIPAA), and how it integrates with your existing stack. Our best-for guides break this down by framework and use case.

WAF pricing ranges from free (Cloudflare free tier, ModSecurity, Coraza) to $3,000+/month for enterprise solutions. Cloud-managed WAFs typically run $20 to $200/month for small and mid-size sites. Enterprise WAFs from Akamai, Imperva, and F5 usually require custom quotes. The biggest cost variable is traffic volume, since most providers charge by request count or bandwidth.

A traditional firewall operates at the network layer (layers 3 and 4), filtering traffic by IP address, port, and protocol. A web application firewall (WAF) operates at the application layer (layer 7), inspecting HTTP and HTTPS traffic to block attacks like SQL injection, XSS, and CSRF. Most modern web applications need both: a network firewall for infrastructure protection and a WAF for application-level security.

Cloudflare's free plan includes basic WAF protection, but it has limits. The free tier covers a subset of OWASP rules and lacks custom rules, advanced rate limiting, and bot management. If you handle payments, store user data, or need compliance certifications, upgrading to Cloudflare Pro ($20/month) or evaluating alternatives like AWS WAF or Sucuri is worth considering.