A web application firewall (WAF) filters malicious HTTP/S traffic SQL injection, cross-site scripting, credential stuffing, and API abuse — before it reaches your applications. Cloudflare is our top WAF pick for 2026 on the strength of protection-per-dollar and a massive attack-visibility network, with Akamai and Imperva holding the enterprise depth tier and AWS WAF owning cloud-native economics. Below, the ten best WAF solutions ranked by security efficacy, deployment fit, and total cost. How a WAF Works A WAF inspects HTTP/S traffic using predefined rules or policies to detect malicious patterns. Here’s how it operates: Traffic Inspection: It examines HTTP methods (e.g., GET, POST), headers, query strings, and...
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