Web Application Firewall & Threat Defense
Cloudflare WAF & AWS WAF
Proprietary Cost$20-$200/mo (Pro/Business) to $3,000+/mo for Enterprise WAF, plus AWS WAF $5/ACL + $1/rule + $0.60/1M reqs
Cloud edge firewalls with aggressive per-request metering, opaque rule costs, and vendor lock-in for enterprise DDoS mitigation.
Top Self-Hosted Alternatives: